Conference · November 25, 2018
PURPOSE
To develop an effective and automated methodology for patient-specific image quality assessment of clinical pediatric body CT examinations.
METHOD AND MATERIALS
This IRB approved study evaluated 816 clinically performed (6/14-11/17), contrast-enh ...
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Conference · November 25, 2018
PURPOSE
To apply an automated program for evaluating pediatric body CT study quality which utilizes metrics of dose and image quality for optimization of liver lesion detection.
METHOD AND MATERIALS
With IRB approval, 880 clinical contrast-enhanced abdom ...
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ConferenceMedical Physics · June 30, 2017
Purpose: Radiologic procedures are optimized based on a benefit-to-risk.
However, risk has been the primary focus of radiology optimization and dose monitoring. Such programs are typically based on the concept of Diagnostic Reference Level (DRL). The term ...
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ConferenceProgress in Biomedical Optics and Imaging Proceedings of SPIE · June 3, 2013
While great advances are made toward making highly realistic, surface models of the human anatomy, very little has been done to fill these bounded surfaces with models of anatomical texture. We propose a method whereby realistic anatomically-based computed ...
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ConferenceMedical Physics · January 1, 2013
Purpose: Te prespectively determine size‐and task‐based image quality indices and te quantify the relatienship between image quality and radiatien dese as a patient‐specific basis fer abdeminepelvic CT scans. Methods: Medel ebserver metric ef detectability ...
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ConferenceMedical Physics · January 1, 2013
Purpose: To study Bismuth (Bi) shielding for the breast, organ dose and image quality were compared under the following conditions: (1) tube current modulation (TCM), (2) TCM with a Bi shield placed after topogram, and (3) manually reduced tube current (RT ...
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ConferenceMedical Physics · January 1, 2011
Purpose: To develop an automated patient‐specific radiation dose monitoring system for CT capable of assessing variability in CT dose delivered to individual patients. Methods: CT image data were sent from PACS to a secure dosimetry server. The dose report ...
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ConferenceMedical Physics · January 1, 2011
Purpose: The effective doses (ED) were compared between the MOSFET method and the DLP method for a variety of clinical CT scans. Methods: Two CT scanners (Manufacturer A and B) were used in this study. Organ doses were measured with MOSFET detectors. Twent ...
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ConferenceProgress in Biomedical Optics and Imaging Proceedings of SPIE · December 1, 2010
Radiation-dose awareness and optimization in CT can greatly benefit from a dose- reporting system that provides radiation dose and cancer risk estimates specific to each patient and each CT examination. Recently, we reported a method for estimating patient ...
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ConferenceSAE Technical Papers · November 3, 2010
Child head trauma in the United States is responsible for 30% of all childhood injury deaths with costs estimated at $10 billion per year. The common tools for studying this problem are the child anthropomorphic test devices (ATDs). The headform sizes and ...
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ConferenceMedical Physics · January 1, 2010
Purpose: A novel method to measure organ dose distributions in a phantom of heterogeneous tissue composition was established using radiochromic XRQA‐2 films. Film response accuracy was validated using thermoluminescent dosimeters (TLDs). Method and Materia ...
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ConferenceMedical Physics · January 1, 2010
Purpose: The purpose of this study was to measure the dose to testes and uterus from the scout views of lumbar puncture procedure and during a routine pelvic CT scan. Materials and methods: Five high sensitivity MOSFETs (TN‐1002RD, Best Medical, Canada) we ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To estimate absorbed doses and effective dose (ED) from cone beam computed tomography (CBCT) with metal oxide semiconductor field effect transistor (MOSFET) detectors in an anthropomorphic phantom, and to estimate the risk of cancer incidence from ...
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ConferenceMedical Physics · January 1, 2009
Purpose: To assess the dosimetric characteristics of bismuth breast shields for a CT beam with ion chamber measurements and Monte Carlo simulations. Method and Materials: Primary attenuation and backscatter effects of both adult and pediatric bismuth super ...
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ConferenceMedical Physics · January 1, 2007
Purpose: To evaluate the utility of a noise addition software in simulating realistic MDCT images at reduced radiation dose levels. Methods and Materials: The utility of the software in simulating realistic low dose CT images was evaluated using a water ph ...
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