SU-FF-J-49: Dose Comparsion of MVCB and Orthogonal Pair Portal Images

2006 ◽  
Vol 33 (6Part5) ◽  
pp. 2031-2031
Author(s):  
L Peng ◽  
C Yang ◽  
P Tsai ◽  
Y Chen ◽  
S Sim ◽  
...  
Keyword(s):  
Orthogonal Pair ◽  
Portal Images

scholarly journals Dose comparison of megavoltage cone-beam and orthogonal-pair portal images

2007 ◽  
Vol 8 (1) ◽  
pp. 10-20 ◽  
Author(s):  
Lee-Cheng Peng ◽  
Ching-Chong Jack Yang ◽  
Sang Sim ◽  
Mitchell Weiss ◽  
Alex Bielajew
Keyword(s):  
Cone Beam ◽  
Dose Comparison ◽  
Orthogonal Pair ◽  
Portal Images

PO-1590: Spirometer guided breathhold breast VMAT on Halcyon verified with portal images and surface tracking

2020 ◽  
Vol 152 ◽  
pp. S864
Author(s):  
L. Delombaerde ◽  
S. Petillion ◽  
C. Weltens ◽  
T. Depuydt
Keyword(s):  
Surface Tracking ◽  
Portal Images

Evaluation of set-up errors and estimation of set-up margin during external beam radiation therapy of prostate cancer using electronic portal imaging device (EPID)

2021 ◽  
pp. 1-8
Author(s):  
Daryoush Khoramian ◽  
Soroush Sistani ◽  
Bagher Farhood
Keyword(s):  
Prostate Cancer ◽  
Radiation Therapy ◽  
Target Volume ◽  
External Beam Radiation ◽  
Beam Radiation ◽  
Cancer Radiotherapy ◽  
Imaging Device ◽  
Portal Images ◽  
Set Up ◽  
Prostate Cancer Radiotherapy

Abstract Aim: In radiation therapy, accurate dose distribution in target volume requires accurate treatment setup. The set-up errors are unwanted and inherent in the treatment process. By achieving these errors, a set-up margin (SM) of clinical target volume (CTV) to planning target volume (PTV) can be determined. In the current study, systematic and random set-up errors that occurred during prostate cancer radiotherapy were measured by an electronic portal imaging device (EPID). The obtained values were used to propose the optimum CTV-to-PTV margin in prostate cancer radiotherapy. Materials and methods: A total of 21 patients with prostate cancer treated with external beam radiation therapy (EBRT) participated in this study. A total of 280 portal images were acquired during 12 months. Gross, population systematic (Σ) and random (σ) errors were obtained based on the portal images in Anterior–Posterior (AP), Medio-Lateral (ML) and Superior–Inferior (SI) directions. The SM of CTV to PTV were then calculated and compared by using the formulas presented by the International Commission on Radiation Units and Measurements (ICRU) 62, Stroom and Heijmen and Van Herk et al. Results: The findings showed that the population systematic errors during prostate cancer radiotherapy in AP, ML and SI directions were 1·40, 1·95 and 1·94 mm, respectively. The population random errors in AP, ML and SI directions were 2·09, 1·85 and 2·29 mm, respectively. The SM of CTV to PTV calculated in accordance with the formula of ICRU 62 in AP, ML and SI directions were 2·51, 2·68 and 3·00 mm, respectively. And according to Stroom and Heijmen, formula were 4·23, 5·19 and 5·48 mm, respectively. And Van Herk et al. formula were 4·96, 6·17 and 6·45 mm, respectively. Findings: The SM of CTV to PTV in all directions, based on the formulas of ICRU 62, Stroom and Heijmen and van Herk et al., were equal to 2·73, 4·98 and 5·86 mm, respectively; these values were obtained by averaging the margins in all directions.

scholarly journals Spirometer-guided breath-hold breast VMAT verified with portal images and surface tracking

2021 ◽  
Vol 157 ◽  
pp. 78-84
Author(s):  
Laurence Delombaerde ◽  
Saskia Petillion ◽  
Caroline Weltens ◽  
Tom Depuydt
Keyword(s):  
Breath Hold ◽  
Surface Tracking ◽  
Portal Images

Maximizing setup accuracy using portal images as applied to a conformal boost technique for prostatic cancer

1992 ◽  
Vol 24 (4) ◽  
pp. 261-271 ◽  
Author(s):  
Jurrien Bijhold ◽  
Joos V. Lebesque ◽  
Augustinus A.M. Hart ◽  
Ron E. Vijlbrief
Keyword(s):  
Prostatic Cancer ◽  
Setup Accuracy ◽  
Portal Images

The role of Digitally Reconstructed Radiographs in the verification process

1999 ◽  
Vol 1 (3) ◽  
pp. 103-108 ◽  
Author(s):  
N. S. Stanley
Keyword(s):  
Digital Imaging ◽  
Digitally Reconstructed Radiographs ◽  
Verification Methods ◽  
Digital Imaging Technology ◽  
Potential Impact ◽  
Portal Images ◽  
Verification Process ◽  
Effective Representation ◽  
Radiotherapy Treatment

This article reviews the development and potential impact of Digitally Reconstructed Radiographs (DRR's) in the planning and verification of radiotherapy treatments. It explores the requirements for the creation of usable DRR's their integration into current verification methods and it highlights some of the factors that may influence the routine use of DRR's. Continuing developments in radiotherapy techniques demand increasingly accurate verification methods. DRR's provide an efficient and effective representation of planned treatments for comparison with both simulator and portal images, encompassing the digital imaging technology which is the future of radiotherapy treatment verification.

scholarly journals Computerized estimation of patient setup errors in portal images based on localized pelvic templates for prostate cancer radiotherapy

2012 ◽  
Vol 53 (6) ◽  
pp. 961-972 ◽  
Author(s):  
Hidetaka Arimura ◽  
Wataru Itano ◽  
Yoshiyuki Shioyama ◽  
Norimasa Matsushita ◽  
Taiki Magome ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Cancer Radiotherapy ◽  
Setup Errors ◽  
Patient Setup ◽  
Portal Images ◽  
Prostate Cancer Radiotherapy

Hit-noise reduction in portal images: a comparison between wavelet- and rank-order-based methods

1997 ◽  
Author(s):  
William J. Dallas ◽  
Eugene J. Gross ◽  
Hans Roehrig ◽  
Thomas L. Vogelsong
Keyword(s):  
Noise Reduction ◽  
Rank Order ◽  
Portal Images
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