scholarly journals Cone beam CT pre- and post-daily treatment for assessing geometrical and dosimetric intrafraction variability during radiotherapy of prostate cancer

2010 ◽  
Vol 12 (1) ◽  
pp. 141-152 ◽  
Author(s):  
Giacomo Reggiori ◽  
Pietro Mancosu ◽  
Angelo Tozzi ◽  
Marie C Cantone ◽  
Simona Castiglioni ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Cone Beam Ct ◽  
Daily Treatment ◽  
Cone Beam

scholarly journals Patient-based low dose cone beam CT acquisition settings for prostate image-guided radiotherapy treatments on a Varian TrueBeam linear accelerator

2020 ◽  
Vol 93 (1115) ◽  
pp. 20200412
Author(s):  
Maria Antonietta Piliero ◽  
Margherita Casiraghi ◽  
Davide Giovanni Bosetti ◽  
Simona Cima ◽  
Letizia Deantonio ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Image Quality ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Subjective Evaluation ◽  
Cone Beam ◽  
Low Contrast ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Prostate Cancer Radiotherapy

Objective: To evaluate the performance of low dose cone beam CT (CBCT) acquisition protocols for image-guided radiotherapy of prostate cancer. Methods: CBCT images of patients undergoing prostate cancer radiotherapy were acquired with the settings currently used in our department and two low dose settings at 50% and 63% lower exposure. Four experienced radiation oncologists and two radiation therapy technologists graded the images on five image quality characteristics. The scores were analysed through Visual Grading Regression, using the acquisition settings and the patient size as covariates. Results: The low dose acquisition settings have no impact on the image quality for patients with body profile length at hip level below 100 cm. Conclusions: A reduction of about 60% of the dose is feasible for patients with size below 100 cm. The visibility of low contrast features can be compromised if using the low dose acquisition settings for patients with hip size above 100 cm. Advances in knowledge: Low dose CBCT acquisition protocols for the pelvis, based on subjective evaluation of patient images.

Deformable image registration for contour propagation from CT to cone-beam CT scans in radiotherapy of prostate cancer

2011 ◽  
Vol 50 (6) ◽  
pp. 918-925 ◽  
Author(s):  
Maria Thor ◽  
Jørgen B. B. Petersen ◽  
Lise Bentzen ◽  
Morten Høyer ◽  
Ludvig Paul Muren
Keyword(s):  
Prostate Cancer ◽  
Image Registration ◽  
Cone Beam Ct ◽  
Deformable Image Registration ◽  
Ct Scans ◽  
Cone Beam ◽  
Contour Propagation

scholarly journals PTV margin definition in hypofractionated IGRT of localized prostate cancer using cone beam CT and orthogonal image pairs with fiducial markers

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Christoph Oehler ◽  
Stephanie Lang ◽  
Peter Dimmerling ◽  
Christian Bolesch ◽  
Stephan Kloeck ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Cone Beam Ct ◽  
Localized Prostate Cancer ◽  
Cone Beam ◽  
Fiducial Markers ◽  
Ptv Margin ◽  
Image Pairs
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