A TCP‐NTCP estimation module using DVHs and known radiobiological models and parameter sets Tập 5 Số 1 - Trang 50-63 - 2004
Brad Warkentin, Pavel Stavrev, N Stavreva, Colin Field, B. G. Fallone
Radiotherapy treatment plan evaluation relies on an implicit estimation of the
tumor control probability (TCP) and normal tissue complication probability
(NTCP) arising from a given dose distribution. A potential application of
radiobiological modeling to radiotherapy is the ranking of treatment plans via a
more explicit determination of TCP and NTCP values. Although the limited
predictive capabil... hiện toàn bộ
Comparison of four commercial devices for RapidArc and sliding window IMRT QA Tập 12 Số 2 - Trang 338-349 - 2011
Varatharaj Chandraraj, S Stathakis, Ravikumar Manickam, C Esquivel, Sanjay S. Supe, N Papanikolaou
For intensity‐modulated radiation therapy, evaluation of the measured dose
against the treatment planning calculated dose is essential in the context of
patient‐specific quality assurance. The complexity of volumetric arc
radiotherapy delivery attributed to its dynamic and synchronization nature
require new methods and potentially new tools for the quality assurance of such
techniques. In the pres... hiện toàn bộ
Volume assessment accuracy in computed tomography: a phantom study Tập 11 Số 2 - Trang 168-180 - 2010
Nicolas D. Prionas, Shonket Ray, John M. Boone
There is a broad push in the cancer imaging community to eventually replace
linear tumor measurements with three‐dimensional evaluation of tumor volume. To
evaluate the potential accuracy of volume measurement in tumors by CT, a gelatin
phantom consisting of 55 polymethylmethacrylate (PMMA) spheres spanning
diameters from 1.6 mm to 25.4 mm was fabricated and scanned using thin slice
(0.625 mm) CT ... hiện toàn bộ
Evaluation of the dosimetric properties of a diode detector for small field proton radiosurgery Tập 16 Số 6 - Trang 51-64 - 2015
Grant McAuley, Anthony V. Teran, Jerry D. Slater, James M. Slater, Andrew Wroe
The small fields and sharp gradients typically encountered in proton
radiosurgery require high spatial resolution dosimetric measurements, especially
below 1–2 cm diameters. Radiochromic film provides high resolution, but requires
postprocessing and special handling. Promising alternatives are diode detectors
with small sensitive volumes (SV) that are capable of high resolution and
real‐time dose ... hiện toàn bộ
Investigating a novel split‐filter dual‐energy CT technique for improving pancreas tumor visibility for radiation therapy Tập 19 Số 5 - Trang 676-683 - 2018
Lianna D. Di Maso, Jessie Y. Huang, M. Bassetti, Larry A. DeWerd, J. Snow
AbstractPurposeTumor delineation using conventional CT images can be a challenge
for pancreatic adenocarcinoma where contrast between the tumor and surrounding
healthy tissue is low. This work investigates the ability of a split‐filter
dual‐energy CT (DECT) system to improve pancreatic tumor contrast and
contrast‐to‐noise ratio (CNR) for radiation therapy treatment planning.Materials
and methodsMu... hiện toàn bộ
Observed intercamera variability in clinically relevant performance characteristics for Siemens Symbia gamma cameras Tập 7 Số 4 - Trang 74-80 - 2006
S. Cheenu Kappadath, William D. Erwin, Richard E. Wendt
We conducted an evaluation of the intercamera (i.e., between cameras)
variability in clinically relevant performance characteristics for Symbia gamma
cameras (Siemens Medical Solutions, Malvern, PA) based on measurements made
using nine separate systems. The significance of the observed intercamera
variability was determined by comparing it to the intracamera (i.e., within a
single camera) variabi... hiện toàn bộ
Dwell position inaccuracy in the Varian GammaMed HDR ring applicator Tập 11 Số 4 - Trang 291-296 - 2010
Robin L. Stern, Tianxiao Liu
Varian has issued two Product Notification Letters warning of known inaccuracies
in dwell positions for their GammaMed HDR ring applicator. This inaccuracy was
measured for two sets of applicators. Autoexposed radiographs were taken of the
HDR source at different dwell positions and analyzed per Varian recommendations
using tools within the BrachyVision treatment planning program. Comparison
betwe... hiện toàn bộ
Accuracy of automatic couch corrections with on‐line volumetric imaging* Tập 10 Số 4 - Trang 106-116 - 2009
Winnie Li, D Moseley, Tony Manfredi, David A. Jaffray
The purpose of this study was to characterize automatic remote couch adjustment
and to assess the accuracy of automatic couch corrections following localization
with cone‐beam CT (CBCT). Automatic couch movement was evaluated through passive
reflector markers placed on a phantom, tracked with an optical tracking system
(OTS). Repeated couch movements in the lateral, cranial/caudal, and vertical
di... hiện toàn bộ
Initial testing of a pixelated silicon detector prototype in proton therapy Tập 18 Số 5 - Trang 315-324 - 2017
Andrew Wroe, Grant McAuley, Anthony V. Teran, Jeannie Hsiu Ding Wong, Marco Petasecca, Michael Lerch, James M. Slater, Anatoly Rosenfeld
AbstractAs technology continues to develop, external beam radiation therapy is
being employed, with increased conformity, to treat smaller targets. As this
occurs, the dosimetry methods and tools employed to quantify these fields for
treatment also have to evolve to provide increased spatial resolution. The team
at the University of Wollongong has developed a pixelated silicon detector
prototype k... hiện toàn bộ