ConferenceBcb 2025 Proceedings of the 16th ACM International Conference on Bioinformatics Computational Biology and Health Informatics · December 10, 2025
Personalized radiation therapy (RT) planning is crucial for minimizing toxicities. As large language models (LLMs) advance, it is vital to assess the RT planning knowledge across model types and sizes. We introduce a board-exam-style RT dataset and benchma ...
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ConferenceJ Appl Clin Med Phys · January 2025
BACKGROUND AND PURPOSE: To describe the clinical commissioning of an in-house artificial intelligence (AI) treatment planning platform for head-and-neck (HN) Intensity Modulated Radiation Therapy (IMRT). MATERIALS AND METHODS: The AI planning platform has ...
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ConferenceLecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics · January 1, 2022
We attempted to investigate the Radiomic feature (RF) repeatability and its agreements across imaging modalities and head-and-neck cancer (HNC) subtypes via image perturbations. Contrast-enhanced computed tomography (CECT), CET1-weight, T2-weight magnetic ...
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ConferencePhys Med Biol · December 6, 2021
Objective:To design a deep transfer learning framework for modeling fluence map predictions for stereotactic body radiation therapy (SBRT) of adrenal cancer and similar sites that usually have a small number of cases.Approach:We developed a transfer learni ...
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ConferenceInternational journal of radiation oncology, biology, physics · November 2021
Purpose/objective(s)With many deep learning (DL) models being developed for clinical applications, it is important to understand their behavior and clinical consequence. This study aims to collect insights of the relationship between fluence map p ...
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ConferenceInternational journal of radiation oncology, biology, physics · November 2021
Purpose/objective(s)Artificial intelligence (AI) driven tools have been maturing in automating the radiation treatment planning process. To prepare for clinical deployment of these tools, it is essential to understand their robustness in clinical ...
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ConferenceInternational journal of radiation oncology, biology, physics · November 2021
Purpose/objective(s)Applications involving AI and Machine Learning are rapidly improving our ability to plan treatments efficiently and effectively by aiding human planners and physicians during the iterative process of planning. These algorithms ...
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ConferenceCancer Research · February 15, 2020
AbstractObjectives: The machine learning (ML)-based automated treatment planning tool has been developed and evaluated for whole breast radiotherapy. This study implemented the tool in clinic and compared pl ...
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ConferenceProceedings 2019 IEEE International Conference on Bioinformatics and Biomedicine Bibm 2019 · November 1, 2019
This study aims to demonstrate the feasibility of using a novel distance-based representation of 3D CT-scan images to train a deep learning model for dose predictions in radiation treatment planning. The distance representation is inspired by previous know ...
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Conference2019 Advances in Science and Engineering Technology International Conferences Aset 2019 · May 14, 2019
Two photon dose computation engines based on pencil beam models were customized to meet the requirements of high conformity and fast computation for Volumetric Modulated Arc Therapy (VMAT) plans. The first model is designed to run through first VMAT iterat ...
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ConferenceTechnology in Cancer Research and Treatment · January 1, 2019
Knowledge models in radiotherapy capture the relation between patient anatomy and dosimetry to provide treatment planning guidance. When treatment schemes evolve, existing models struggle to predict accurately. We propose a case-based reasoning framework d ...
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ConferenceTechnology in Cancer Research and Treatment · January 1, 2019
Purpose: To optimize collimator setting to improve dosimetric quality of pancreas volumetric modulated arc therapy plan for stereotactic body radiation therapy. Materials and Methods: Fifty-five volumetric modulated arc therapy cases in stereotactic body r ...
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ConferenceMed Phys · June 2016
PURPOSE: To develop a data-mining methodology based on quantum clustering and machine learning to predict expected dosimetric endpoints for lung SBRT applications based on patient-specific anatomic features. METHODS: Ninety-three patients who received lung ...
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ConferenceMedical Physics · June 2015
Purpose:We present a lung IMRT planning method which automatically determines both plan optimization objectives and beam configurations with non‐coplanar beams by analyzing patient‐specific anatomical information ...
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ConferenceMedical Physics · June 2015
Purpose:We present a novel method for generating a local segment of Pareto surface around the best achievable plan predicted by a knowledge model. This local‐MCO will provide an efficient method to enable clinical ...
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ConferenceMedical Physics · June 2015
Purpose:We present an implementation of the knowledge‐based planning method utilizing a rapid learning approach which enables the accurate evolution of models as new data are collected during daily clinical practi ...
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ConferenceIfmbe Proceedings · January 1, 2015
The purpose for this study is to develop robust and comprehensive knowledge models which can provide patient specific prediction of achievable dose distribution in radiation therapy plans for a wide range of cancer types. These models are useful tools to g ...
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ConferenceIfmbe Proceedings · January 1, 2015
We present an efficient knowledge based automatic beam configuration determination method by utilizing patient-specific anatomy and tumor geometry information and a beam bouquet atlas. The proposed technique is based on learning the relationship between pa ...
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ConferenceIfmbe Proceedings · January 1, 2015
The purpose of this study is to implement a rapid learning method to train the knowledge models to predict the organ-at-risk (OAR) dose sparing in radiation therapy (RT) based on an array of patient anatomical features. We also aim to establish the evaluat ...
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ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2015
Infrared imaging fault detection which is treated as an ideal, non-contact, non-destructive testing method is applied to the circuit board fault detection. Since Infrared images obtained by handheld infrared camera with wide-Angle lens have both rigid and ...
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ConferenceMedical Physics · June 2014
Purpose:We investigate the feasibility of choosing from a small set of standardized templates of beam bouquets (i.e., entire beam configuration settings) for lung IMRT planning to improve planning efficiency and q ...
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ConferenceMed Phys · June 2013
PURPOSE: Volumetric modulated arc therapy (VMAT) is a relatively new treatment modality for dynamic photon radiation therapy. Pre-treatment quality assurance (QA) is necessary and many efforts have been taken to apply electronic portal imaging device (EPID ...
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ConferenceMed Phys · June 2013
PURPOSE: Correct MLC modeling is essential to the accurate IMRT delivery. Most TPSs use simplified models with parameters of leaf transmission (LT) and dynamic leaf gap (DLG). The common way to determine them is through extrapolation from measurements. In ...
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ConferenceMed Phys · June 2013
PURPOSE: Lateral dimensions of the incident electron beam (spot sizes) are essential for accurate modelling of x-ray fields, especially for small field output factors and penumbrae. We present spot sizes measured on the Varian TrueBeam linac and propose an ...
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ConferenceMed Phys · June 2013
PURPOSE: Electron beam therapy is under-utilized in radiation treatment of cancer and has remained practically unchanged for decades. We propose a new technique, Dynamic Electron Arc Radiotherapy (DEAR) with synchronized couch motion. In DEAR, gantry rotat ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To quantify the influence of the gantry‐mounted Delta4‐AT detector array on beam quality, and the detection sensitivity to machine output and MLC position deviations. Methods: A Delta4‐AT prototype was attached to the accessory holder mount of a V ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To evaluate the quality of organs‐at‐risk (OARs) dose sparing in IMRT plans for anorectal and prostate cancer cases utilizing organ‐based knowledge models to predict OAR DVHs.MethodsThe quality of OAR dose sparing in IMRT plans are evaluated by or ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To evaluate the dosimetric quality of an automatic IMRT planning method for Head and Neck (HN) cancer cases. Methods: Eighteen HN cancer patients are planned with nine equally spaced IMRT beams. The OAR dose sparing objectives for each plan (prima ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To evaluate the dosimetric quality of an automatic volumetric‐modulated arc therapy (VMAT) planning method for Head and Neck (HN) cancer cases. Methods: Eighteen HN cancer cases are planned automatically by 2‐arc VMAT. An OAR DVH prediction model ...
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ConferenceMedical Physics · January 1, 2013
Purpose: Electron beam therapy is under‐utilized in radiation treatment of cancer and has remained practically unchanged for decades. We propose a new technique, Dynamic Electron Arc Radiotherapy (DEAR) with synchronized couch motion. DEAR utilizes modulat ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To explore a method of using a computer system for multi‐media cases conference in clinical radiation oncology, in order to replace the traditional use of film images and paper. Methods: In a conference room without any treatment planning system(T ...
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ConferenceMedical Physics · January 1, 2013
Purpose: Referring to the Standard of the Pharmaceutical Industry of the People's Republic of China “Performance and test methods for intensity modulated radiation therapy(IMRT) treatment planning system”, we will do a series of tests to an IMRT planning s ...
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ConferenceMed Phys · June 2012
PURPOSE: To evaluate the dosimetric benefits of online image guidance during prostate stereotactic body radiotherapy (SBRT) and the potential on margin reduction. METHODS: 28 prostate SBRT patients were retrospectively studied, each treated with 37Gy in 5 ...
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ConferenceMed Phys · June 2012
PURPOSE: We present an evidence-based approach to quantifying the dose sparing trade-offs between different Organs-at-risk (OARs) and the trade-off between OAR dose sparing and target dose coverage in IMRT plans. METHODS: The interaction between dose spari ...
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ConferenceMed Phys · June 2012
PURPOSE: To develop a predictive model to assess the quality of critical organ dose sparing in IMRT plans by providing patient specific dose sparing references, based on an array of patient anatomical features and prior planning experience. METHODS: Contri ...
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ConferenceMedical Physics · January 1, 2011
Purpose: In VMAT, the dose rate, MLC position, and gantry angle change simultaneously, it is important they follow their predefined trajectories to ensure correct dose delivery. Our purpose is to develop an efficient VMAT QA strategy using EPID that is cap ...
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ConferenceMedical Physics · January 1, 2011
Volumetric modulated arc therapy (VMAT) is an arc‐based dose delivery approach that produces highly conformal dose distributions similar to those generated with static gantry intensity modulated radiation therapy. Like many existing IMRT approaches, this t ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To implement a clinical protocol for the use of scrotal shields for anal cancer IMRT treatment. Methods and Results: (1) Simulation The patient is immobilized in a full‐body alpha‐cradle mold in the frog‐leg position. Further, the mold is built up ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To compare two methods for reducing artifacts in cone‐beam CT (CBCT) images caused by the presence of an electromagnetic array used for tracking transponders during radiotherapy. Methods: A pelvis phantom was imaged using a gantry mounted CBCT sys ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To develop a Radiation Treatment Guidelines Ontology (RTGO) that represents the concepts, knowledge, and guidelines in radiation therapy using a formal and computable framework. This ontology will serve as the foundation of a decision support syst ...
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ConferenceMedical Physics · January 1, 2011
Purpose: Presently, there is no patient specific dosimetric QA for radiation treatment of moving targets. Here we present a patient specific QA protocol for verification of 4D dosimetry delivered to a moving target in SBRT of lung and liver tumors. Methods ...
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ConferenceMedical Physics · January 1, 2011
Purpose: In fractionated radiotherapy of prostate cancer, both online and offline image‐guided strategies have been used to manage uncertainties such as setup errors and organ motions. In general, online image guidance is more effective than offline image ...
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ConferenceMedical Physics · January 1, 2011
Purpose: Margin has been commonly used to evaluate different image guidance (IG) strategies in prostate cancer radiotherapy. However, it becomes cumbersome when applied to adaptive radiotherapy. In this study, a new index, cumulative index of target volume ...
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ConferenceMedical Physics · January 1, 2011
Purpose: In external beam radiotherapy of prostate cancer, the inter‐fractional motion can have several forms: changes in position, shape and volume. The changes in position can be corrected by online image guidance, while the shape and volume changes are ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To find the most robust strategies of objective setting and starting stage for online plan re‐optimization, so it can be automatically executed within 1 min while providing high quality adaptive plans. Methods: 10 prostate cancer patients, each wi ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To identify the key factors of patient anatomy that influence the optimal dose volume histograms (DVHs) for the organs‐at‐risk (OARs) and to explore the tradeoffs between different OAR sparing goals. Methods: 88 prostate IMRT plans were studied re ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To summarize the knowledge of the dependence of organ‐at‐risk (OAR) dose‐volume distribution on patient's anatomy by machine learning techniques from a database of previous expert plans. Methods: 35 head‐and‐ neck IMRT plans were studied retrospec ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To evaluate setup errors of 192 patients undergone image‐guided radiation therapy (IGRT) using kilovoltage (kV) cone beam CT (CBCT). Methods: A retrospective study has been carried out for 192 patients treated with intensity‐modulated radiation th ...
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ConferenceMedical Physics · January 1, 2010
Purpose: To compare the dosimetric results and treatment efficiency of intensity modulated arc therapy using RapidArc™ to static‐gantry IMRT plans for conventional fractionation treatment of head‐and‐neck cancer. Materials and Methods: This study evaluated ...
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ConferenceMedical Physics · January 1, 2010
Purpose: Gantry‐angle dependence of dose measurement for intensity‐modulated arc therapy (IMAT) quality assurance (QA) using a two‐dimensional ion chamber array may be significant. A new device, the gantry angle sensor, has been provided to compensate for ...
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ConferenceMedical Physics · January 1, 2010
Purpose: To explore similarities between intensity modulated radiotherapy (IMRT) and intensity modulated arc therapy (IMAT) techniques in the context of the number of multi‐leaf collimator (MLC) segments required to achieve plan objectives, the major facto ...
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ConferenceMedical Physics · January 1, 2010
Purpose: The anisotropic analytical algorithm (AAA) has been shown to provide more accurate dose calculation due to 3D scatter and inhomogeneity corrections than the pencil beam convolution algorithm (PBC) for inhomogeneous anatomical regions such as lung ...
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ConferenceMedical Physics · January 1, 2010
Purpose: The challenge for implementing promising Arc Modulated Radiation Therapy (AMRT) is its effectiveness of treatment planning tools to find optimal multileaf collimator (MLC) sequence and the fluence map. This study provides a new approach to the abo ...
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ConferenceMedical Physics · January 1, 2010
Purpose: The large fractional dose of hypo‐fractionated prostate treatment requires high accuracy of daily treatment delivery. This study analyzes the performance of an adaptive IGRT (AIGRT) technique, which combines image guidance and adaptive re‐planning ...
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ConferenceMedical Physics · January 1, 2010
Purpose: To monitor the quality of adaptive IMRT plans, especially dose sparing for the organs‐at‐risk (OARs), a plan evaluation tool is developed to predict the dose volume histogram (DVH) based on patient's anatomical information and a database of high q ...
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ConferenceMedical Physics · January 1, 2010
Purpose: To explore the new degree of freedom of VMAT to design a novel technique for TBI, in which patient is positioned supine/prone on the floor and an arc field is delivered with variable dose rate and/or dynamic collimators. Method and Materials: A fo ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To present QA measurements over extended periods at our institute and recommend a QA program for image‐guided radiosurgery on Novalis Tx system. Method and Materials: Novalis Tx system is developed based on a Trilogy linear accelerator featuring B ...
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ConferenceMedical Physics · January 1, 2009
Purpose: The purpose of this study is to compare RapidArc plans and conventional IMRT plans for head‐and‐neck cancer treatment involving bilateral nodes. Methods and Materials: This study included 10 locally advanced head‐and‐neck cancer patients. The plan ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To investigate localization accuracy for image‐guided frameless stereotactic‐radiosurgery (IG‐SRS) using CBCT 6D image registration and 6D‐couch on Novalis Tx system. Method and Materials: Novalis Tx system is a powerful radiosurgery system featur ...
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ConferenceMedical Physics · January 1, 2009
Objectives: To compare localization accuracy using both conventional frame‐based localizers and cone‐beam CT (CBCT) images for stereotactic radiosurgery (SRS). Methods: A SRS geometric phantom was used to verify the localization accuracy based on a SRS loc ...
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ConferenceMedical Physics · January 1, 2009
Purpose Volumetric modulated arc therapy (VMAT) is a rotational IMRT modality that combines dose rate modulation with gantry and MLC motion, thereby increasing the complexity of IMRT delivery. Effective implementation of this technology is still quite new ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To develop a patient‐specific quality assurance protocol for RapidArc™ radiotherapy. Method and Materials: Following the commissioning of RapidArc™ treatment delivery, we tested several methods of patient‐specific quality assurance (QA). Ion chamb ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To investigate how a real‐time tracking technique, based on implanted transponders, could be effectively integrated into the current process for image‐guided radiation treatment of prostate cancer. Method and Materials: Current prostate IGRT proce ...
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ConferenceMedical Physics · January 1, 2009
Any deviation between treated and planned volumes for 3‐D conformal therapy, such as IMRT, may cause an adverse clinical outcome. It is therefore critical to minimize all potential deviations using an on‐board (or real‐time) imaging procedure immediately p ...
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ConferenceMedical Physics · January 1, 2009
Purpose: Volumetric modulated arc treatment (VMAT) reduces treatment time over static beam intensity modulated treatment (IMRT) by delivering IMRT using arcs. This clinical study evaluates the feasibility of using VMAT for spine stereotactic body radiother ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To develop quality‐assurance (QA) protocols for the Calypso® 4D Localization System including acceptance testing, commissioning, daily QA, monthly QA, and annual QA. Method and Materials: The following acceptance testing/commissioning/QA protocols ...
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ConferenceMedical Physics · January 1, 2009
Purpose: In online image‐guided radiation therapy of prostate cancer, the inter‐fractional translational motion is corrected at each fraction. However, rotation and deformation can only be accounted for using planning margins. Offline adaptive strategy has ...
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ConferenceMedical Physics · January 1, 2009
Purpose: In prostate IGRT employing hypofractionation, two methods are commonly used: patient re‐positioning and re‐planning. We propose a hybrid IGRT technique in this study. The dosimetric benefits and efficiency improvement of the technique is quantitat ...
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ConferenceMedical Physics · January 1, 2009
Purpose: The purpose of this report is to compare RapidArc plans and conventional IMRT plans for prostate cancer involving seminal vesicles. Methods and Materials: This study included 10 patients. The planning‐target volume (PTV) contained the prostate and ...
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ConferenceMedical Physics · January 1, 2009
Purpose: In online image‐guided radiotherapy of prostate cancer, the setup error and inter‐fractional motion is eliminated through pre‐treatment imaging and couch correction at each fraction. However, the rotation and deformation is not corrected and only ...
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ConferenceMedical Physics · January 1, 2009
Purpose: High dose gradients offered by IMRT increase the sensitivity of treatment to setup errors compared to conventional treatments. We evaluated the dosimetric effects of setup error on HN‐IMRT using actual patient CBCT measurements. The purposes were ...
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ConferenceMedical Physics · January 1, 2009
Purpose: Use of on‐board cone‐beam CT (CBCT) imaging during HN‐IMRT treatment course allows for calculation and reconstruction of the dose delivered to the patient daily. The purpose of this study was to investigate whether the average fractional dose repr ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To develop a quick and efficient patient‐specific QA procedure for both IMRT and RapidArc using MLC dynalog files. Method and Materials: MLC dynalog files record both planned and actual MLC leaf positions, actual fractional MU and gantry angle. Th ...
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ConferenceMedical Physics · January 1, 2008
Purpose: A new type of high‐definition multi‐leaf collimator (HD 120 MLC, Varian Medical Systems) is being introduced into clinical practice to improve the conformality of stereotactic radiation therapy and radiosurgery. Its leaf width at isocenter is 2.5 ...
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ConferenceMedical Physics · January 1, 2008
Purpose: While the advantage of imaging guidance with cone beam CT (CBCT) guided radiosurgery is obvious, the localization accuracy of CBCT guided radiosurgery still remains a concern. This study utilized a geometric phantom with known target positions to ...
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ConferenceMedical Physics · January 1, 2008
Purpose: Using an on‐board cone‐beam CT (CBCT) based statistical margin model to determine whether a prostate center‐of‐mass (COM) based translation correction procedure can significantly reduce the CTV‐to‐PTV margin required for prostate patients who were ...
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ConferenceMedical Physics · January 1, 2008
Purpose: To investigate a method to convert the pixel values of DTS images to HU values with reference HU values from CT images. Method and Materials: This study included CT and DTS images of two phantoms (Catphan and a chest phantom) and three patients (p ...
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ConferenceMedical Physics · January 1, 2008
Purpose: To assess the impact of scan angles on the visibility of anatomy in on‐board digital tomosynthesis (DTS) images as a means to optimize this technique. Method and Materials: Head and neck cancer patients undergoing intensity‐modulated radiotherapy ...
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ConferenceMedical Physics · January 1, 2008
Purpose: To investigate the feasibility of a novel online IMRT re‐optimization process. This online process can be an integral part to the current prostate IGRT paradigm to augment the existing patient alignment techniques for cases with complex daily orga ...
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ConferenceMedical Physics · January 1, 2008
Purpose: Accurate and reliable post‐prostate implant dosimetric analysis requires optimal identification of the seeds on CT and optimal description of soft tissues on MRI. We present a fast seed localization technique for MRI that is also robust from motio ...
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ConferenceMedical Physics · January 1, 2008
Purpose: This study proposes a novel on‐line IGRT technique that can modify the original IMRT plan to match with the “anatomy‐of‐the‐day” within few minutes. The performance of this technique is compared with current on‐line IGRT strategies using bone/soft ...
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ConferenceMedical Physics · January 1, 2008
Purpose: It is critical that image‐guided radiation therapy (IGRT) and adaptive radiation therapy (ART) are performed with clearly defined goals without abusing the technologies. This study illustrates the current integrated system that provides efficient ...
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ConferenceMedical Physics · January 1, 2007
Purpose: To demonstrate clinical feasibility of generating digital tomosynthesis (DTS) in a single breath‐hold (BH) period compared to multiple BH periods for CBCT acquisition and to examine on‐board BH‐DTS as an efficient alternative to BH‐CBCT for target ...
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ConferenceMedical Physics · January 1, 2007
PURPOSES: There is a growing interest using MRI only for prostate cancer treatment planning. This study is aimed to investigate clinical feasibility of matching 3D planning MRI to on‐board cone‐beam CT (CBCT) images for target localization. Materials and M ...
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ConferenceMedical Physics · January 1, 2007
Purpose: To compare treatment isocenter placement based on OBI 2D kV imaging and OBI 3D‐CBCT imaging for patients undergoing SBRT, and compare the CBCT based isocenter shifts among liver, lung and spine lesions. Material and Methods: 119 SBRT fractions wer ...
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ConferenceMedical Physics · January 1, 2007
Purpose: It is well‐known that fluctuation in chemical compositions can lead to significant errors in the dosimetry of low‐energy brachytherapy sources using the traditional “water‐equivalent” solid phantoms. The aim of this work was to investigate the fea ...
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ConferenceMedical Physics · January 1, 2007
Purpose: MU efficiency is a major figure of merit for dMLC leaf sequencing. However, leaf sequencing is often generated with focus on other constraints and the MU efficiency is taken as a byproduct. This work is to develop a new dMLC leaf sequencing algori ...
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ConferenceMedical Physics · January 1, 2007
Purpose: The impact of organ motion and deformation has been studied for conventional radiation therapy. The cumulative dose is usually a blurred version of the static plan after motion‐induced hot and cold spots average out over a large number of fraction ...
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ConferenceMedical Physics · January 1, 2007
Purpose: To apply on‐boardmdash;image (OBI) guided amplitude gating for breath‐hold treatment and to assess treatment margin adequacy by analyzing the isocenter placement based on orthogonal 2D kV radiographs and 3D cone‐beam CT (CBCT) acquired under ampli ...
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ConferenceMedical Physics · January 1, 2007
Purpose: This study proposes a novel on‐line adaptive planning technique for the prostate treatment by directly re‐optimizing the IMRT plan based on both the “anatomy‐of‐the‐day” and the original plan information. Method & Materials: Using a commercial tre ...
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ConferenceMedical Physics · January 1, 2007
Purpose: This clinical study evaluates digital tomosynthesis (DTS) technology for daily imaging guidance for partial breast irradiation (PBI) and compares its positioning accuracy to the 3D CBCT technique. Compared to CBCT, DTS offers lower imaging dose an ...
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ConferenceMedical Physics · January 1, 2007
Purpose: To investigate the clinical feasibility of performing concurrent kilovoltage (kV) x‐ray imaging while the patient at the treatment position was irradiated by megavoltage (MV) beams. Method and Materials: Anatomical visibility and contrast details ...
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ConferenceMedical Physics · January 1, 2006
Purpose: To demonstrate the concept of 2D projection and 3D volumetric imaging using brachytherapy treatment sources in patient prior to or during treatment. Method and Materials: As shown Figure 1, an Ir‐192 HDR catheter is placed at 15 cm depth (a reason ...
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ConferenceMedical Physics · January 1, 2006
Purpose: To demonstrate the conservation rule of the integrated reference air kerma (IRAK). Method and Materials: For a brachytherapy photon source whose radial dose functions is flat over the clinical distance range, the dose falls off with the inverse sq ...
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ConferenceMedical Physics · January 1, 2006
Purpose: The internal target volume (ITV) could be determined using 4D CT simulation images and be verified in the treatment room using on‐board cone‐beam CT (CBCT) since the CBCT projection images are acquired over approximately 10 breathing cycles. This ...
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ConferenceMedical Physics · January 1, 2006
Purpose: We have applied OBI guidance together with a respiratory gating system to effectively control patient positioning for amplitude gating treatment with breath hold. The deep inspiration breath‐hold treatment has been proven effective in reducing the ...
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ConferenceMedical Physics · January 1, 2006
Daily target localization is a critical step to secure accurate delivery for 3‐D conformal radiation therapy and intensity‐modulated radiation therapy. One emerging technology using in‐room kilovoltage (kV) imaging has shown to be very promising for target ...
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ConferenceMedical Physics · January 1, 2006
Purpose: To implement a clinical tool for off‐line review of Cone‐Beam Computed Tomography (CBCT) based 3D target verification and localization. Methods and Materials: An in‐house 3D target localization and verification tool is being developed to allow phy ...
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ConferenceMedical Physics · January 1, 2006
Purpose: To evaluate clinical effectiveness of target localization using cone‐beam CT (CBCT) for H&N IMRT treatment. Method and Materials: All H&N patients treated with an IRB approved protocol were imaged on the first day of treatment and weekly thereafte ...
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