scholarly journals Image-Guided Radiotherapy Using MV for Prostate Cancer: A Correlation Analysis between Electronic Portal Imaging with Fiducial Markers and Cone Beam CT

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Salas Buzón M del C ◽  
Gutiérrez Bayard L ◽  
Lagares-Franco C ◽  
de Ingunza Barón L
Keyword(s):  
Prostate Cancer ◽  
Correlation Analysis ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Fiducial Markers ◽  
Portal Imaging ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Electronic Portal Imaging

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.

Image-guided radiotherapy for prostate cancer with cone beam CT: dosimetric effects of imaging frequency and PTV margin

2016 ◽  
Vol 121 (1) ◽  
pp. 103-108 ◽  
Author(s):  
Hemal Ariyaratne ◽  
Hayley Chesham ◽  
John Pettingell ◽  
Roberto Alonzi
Keyword(s):  
Prostate Cancer ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Ptv Margin

scholarly journals Radioterapia Guiada por Imagem: Técnicas e Controle de Qualidade

2019 ◽  
Vol 13 (1) ◽  
pp. 99
Author(s):  
Leandro Rodrigues Fairbanks ◽  
Laura Furnari
Keyword(s):  
Cone Beam ◽  
Portal Imaging ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Electronic Portal Imaging

A radioterapia é uma modalidade de tratamento em constante evolução que procura atingir o seguinte objetivo: irradiar, com precisão cada vez maior, o alvo, poupando ao máximo as estruturas vizinhas. Para alcançar esse objetivo em tratamentos complexos como radioterapia de intensidade modulada (IMRT), radiocirurgia estereotática (SRS) e radioterapia estereotática de corpo (SBRT), surgiu a radioterapia guiada por imagem (image guided radiotherapy — IGRT). Neste artigo, são descritos os princípios de funcionamento e as características dos seguintes principais dispositivos utilizados: Electronic portal imaging, Cone beam, ExacTrac e Calypso. Como todo o sistema que executa procedimentos que envolvem pacientes, os dispositivos de IGRT também precisam ser submetidos a testes de controle de qualidade que garantam a segurança dos pacientes e a precisão dos tratamentos. Para os diferentes dispositivos apresentamos testes com foco na geometria, na qualidade da imagem, no sistema de operação e na segurança. Também são apresentadas a frequência recomendada e a tolerância aceitável.

EP-1603 IMAGE GUIDED RADIOTHERAPY USING INTRA-PROSTATIC GOLD FIDUCIAL MARKERS AND MEGAVOLTAGE ELECTRONIC PORTAL IMAGING

2012 ◽  
Vol 103 ◽  
pp. S614-S615
Author(s):  
A. O'Neill ◽  
D. Irvine ◽  
M. Wilkinson ◽  
M. Gillen ◽  
P. Keane ◽  
...  
Keyword(s):  
Fiducial Markers ◽  
Portal Imaging ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
Electronic Portal Imaging
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