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...... 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 ...... 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...... 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‐ti...... 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. Comparis...... 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 ver...... hiện toàn bộ Stability of serrated gold coil markers in prostate localization Tập 12 Số 3 - Trang 161-168 - 2011
Larry L. Gates, David J. Gladstone, Mohit S. Kasibhatla, John F. Marshall, John D. Seigne, Eugen B. Hug, Alan C. Hartford
We investigated the stability of serrated gold coils (Visicoil) implanted within the prostate glands of patients undergoing definitive external beam radiotherapy for prostate cancer. Radiopaque Visicoils of diameter 0.75 mm and median length 3 cm (range 2–4 cm) were implanted, one into each lobe of the prostate glands of 30 patients planned for external beam treatment. The coils were visua...... hiện toàn bộ