Scholars@Duke
Justus D Adamson

Justus D Adamson

Professor of Radiation Oncology
Radiation Oncology
justus.adamson@duke.edu
Radiation Physics Red Zone Bas, Box 3295, Durham, NC 27710

Featured Works

Independent verification of gantry angle for pre-treatment VMAT QA using EPID.

Journal article Phys Med Biol · October 21, 2012 Featured Publication We propose a method to incorporate independent verification of gantry angle for electronic portal imaging device (EPID)-based pre-treatment quality assurance (QA) of clinical volumetric modulated arc therapy (VMAT) plans. Gantry angle is measured using pro ... Full text Link to item Cite

Imaging system QA of a medical accelerator, Novalis Tx, for IGRT per TG 142: our 1 year experience.

Journal article J Appl Clin Med Phys · July 5, 2012 Featured Publication American Association of Physicists in Medicine (AAPM) task group (TG) 142 has recently published a report to update recommendations of the AAPM TG 40 report and add new recommendations concerning medical accelerators in the era of image-guided radiation th ... Full text Open Access Link to item Cite

Commissioning a CT-compatible LDR tandem and ovoid applicator using Monte Carlo calculation and 3D dosimetry.

Journal article Med Phys · July 2012 Featured Publication PURPOSE: To determine the geometric and dose attenuation characteristics of a new commercially available CT-compatible LDR tandem and ovoid (T&O) applicator using Monte Carlo calculation and 3D dosimetry. METHODS: For geometric characterization, we quantif ... Full text Link to item Cite

Preoperative single fraction partial breast radiotherapy for early-stage breast cancer.

Journal article Int J Radiat Oncol Biol Phys · January 1, 2012 Featured Publication PURPOSE: Several recent series evaluating external beam accelerated partial breast irradiation (PBI) have reported adverse cosmetic outcomes, possibly related to large volumes of normal tissue receiving near-prescription doses. We hypothesized that deliver ... Full text Link to item Cite

Contour based respiratory motion analysis for free breathing CT.

Journal article Comput Biol Med · October 2011 Featured Publication We propose a method to quantify superior-inferior (SI) motion of a rigid target using the 3D contour from free-breathing CT (FBCT). The technique utilizes similarity between 2D contours (Jaccard Index) and a population based density function for probabilit ... Full text Link to item Cite

Dosimetric effect of intrafraction motion and residual setup error for hypofractionated prostate intensity-modulated radiotherapy with online cone beam computed tomography image guidance.

Journal article Int J Radiat Oncol Biol Phys · June 1, 2011 Featured Publication PURPOSE: To quantify the dosimetric effect and margins required to account for prostate intrafractional translation and residual setup error in a cone beam computed tomography (CBCT)-guided hypofractionated radiotherapy protocol. METHODS AND MATERIALS: Pro ... Full text Link to item Cite

Prostate intrafraction motion assessed by simultaneous kilovoltage fluoroscopy at megavoltage delivery I: clinical observations and pattern analysis.

Journal article Int J Radiat Oncol Biol Phys · December 1, 2010 Featured Publication PURPOSE: To describe prostate intrafraction motion using kilovoltage fluoroscopy at treatment delivery for a hypofractionated radiotherapy protocol. METHODS AND MATERIALS: Kilovoltage images were acquired during treatment delivery, as well as pre- and post ... Full text Link to item Cite

Prostate intrafraction motion assessed by simultaneous kV fluoroscopy at MV delivery II: adaptive strategies.

Journal article Int J Radiat Oncol Biol Phys · December 1, 2010 Featured Publication PURPOSE: To investigate potential benefits of adaptive strategies for managing prostate intrafractional uncertainties when interfraction motion is corrected online. METHODS AND MATERIALS: Prostate intrafraction motion was measured using kV fluoroscopy duri ... Full text Link to item Cite

Maximum intensity projection (MIP) imaging using slice-stacking MRIa).

Journal article Med Phys · November 2010 Featured Publication PURPOSE: To evaluate the feasibility of acquiring maximum intensity projection (MIP) images using a novel slice-stacking MRI (SS-MRI) technique. METHODS: The proposed technique employed a steady state acquisition sequence to image multiple axial slices. At ... Full text Link to item Cite

Inferences about prostate intrafraction motion from pre- and posttreatment volumetric imaging.

Journal article Int J Radiat Oncol Biol Phys · September 1, 2009 Featured Publication PURPOSE: To evaluate the ability of rectal filling, bladder filling, and prostate localization from pre- and posttreatment volumetric imaging to predict prostate intrafraction motion. METHODS AND MATERIALS: Pre- and posttreatment cone beam computed tomogra ... Full text Link to item Cite

Optimizing monoscopic kV fluoro acquisition for prostate intrafraction motion evaluation.

Journal article Phys Med Biol · January 7, 2009 Featured Publication Monoscopic kV imaging during radiotherapy has been recently implemented for prostate intrafraction motion evaluation. However, the accuracy of 3D localization techniques from monoscopic imaging of prostate and the effect of acquisition parameters on the 3D ... Full text Link to item Cite

Prostate intrafraction motion evaluation using kV fluoroscopy during treatment delivery: a feasibility and accuracy study.

Journal article Med Phys · May 2008 Featured Publication Margin reduction for prostate radiotherapy is limited by uncertainty in prostate localization during treatment. We investigated the feasibility and accuracy of measuring prostate intrafraction motion using kV fluoroscopy performed simultaneously with radio ... Full text Link to item Cite

Long-path measurements of ultrasonic attenuation and velocity for very dilute slurries and liquids and detection of contaminates.

Journal article Ultrasonics · December 22, 2006 Featured Publication The objective was to use multiple paths through the slurry to determine the lowest concentration that provided accurate attenuation measurements and to measure the velocity of sound through an effective long path. Ultrasonic attenuation measurements were o ... Full text Link to item Cite

Measurement of the viscosity-density product using multiple reflections of ultrasonic shear horizontal waves.

Journal article Ultrasonics · December 22, 2006 Featured Publication We have developed an on-line computer-controlled sensor, based on ultrasound reflection measurements, to determine the product of the viscosity and density of a liquid or slurry for Newtonian fluids and the shear impedance of the liquid for non-Newtonian f ... Full text Link to item Cite