SU-E-T-125: VMAT Monthly Quality Assurance Using a 2D Ionization Chamber Array

2011 ◽  
Vol 38 (6Part12) ◽  
pp. 3515-3515
Author(s):  
P Myers ◽  
C Buckey ◽  
D Mihailidis ◽  
P Mavroidis ◽  
C Esquivel ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Ionization Chamber

Quality assurance of IMRT treatment plans for a 1.5 T MR-linac using a 2D ionization chamber array and a static solid phantom

2020 ◽  
Vol 65 (16) ◽  
pp. 16NT01
Author(s):  
David Mönnich ◽  
Jasmin Winter ◽  
Marcel Nachbar ◽  
Luise Künzel ◽  
Simon Boeke ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Ionization Chamber ◽  
Treatment Plans

Use of a two-dimensional ionization chamber array for proton therapy beam quality assurance

2008 ◽  
Vol 35 (9) ◽  
pp. 3889-3894 ◽  
Author(s):  
Bijan Arjomandy ◽  
Narayan Sahoo ◽  
Xiaoning Ding ◽  
Michael Gillin
Keyword(s):  
Quality Assurance ◽  
Proton Therapy ◽  
Ionization Chamber ◽  
Beam Quality ◽  
Two Dimensional

Patient specific IMRT quality assurance with film, ionization chamber and detector arrays: Our institutional experience

2015 ◽  
Vol 115 ◽  
pp. 12-16 ◽  
Author(s):  
Wilbert Cruz ◽  
Ganesh Narayanasamy ◽  
Morgan Regan ◽  
Panayiotis Mavroidis ◽  
Niko Papanikolaou ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Ionization Chamber ◽  
Patient Specific ◽  
Detector Arrays ◽  
Institutional Experience

scholarly journals Assessment of Delivery Quality Assurance for Stereotactic Radiosurgery With Cyberknife

2021 ◽  
Vol 11 ◽  
Author(s):  
Jun Li ◽  
Xile Zhang ◽  
Yuxi Pan ◽  
Hongqing Zhuang ◽  
Junjie Wang ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Stereotactic Radiosurgery ◽  
Dose Distribution ◽  
Ionization Chamber ◽  
Treatment Time ◽  
Target Volume ◽  
Sensitive Volume ◽  
Passing Rates ◽  
Passing Rate ◽  
Gamma Passing Rate

PurposeThe purpose of this study is to establish and assess a practical delivery quality assurance method for stereotactic radiosurgery with Cyberknife by analyzing the geometric and dosimetric accuracies obtained using a PTW31016 PinPoint ionization chamber and EBT3 films. Moreover, this study also explores the relationship between the parameters of plan complexity, target volume, and deliverability parameters and provides a valuable reference for improving plan optimization and validation.MethodsOne hundred fifty cases of delivery quality assurance plans were performed on Cyberknife to assess point dose and planar dose distribution, respectively, using a PTW31016 PinPoint ionization chamber and Gafchromic EBT3 films. The measured chamber doses were compared with the planned mean doses in the sensitive volume of the chamber, and the measured planar doses were compared with the calculated dose distribution using gamma index analysis. The gamma passing rates were evaluated using the criteria of 3%/1 mm and 2%/2 mm. The statistical significance of the correlations between the complexity metrics, target volume, and the gamma passing rate were analyzed using Spearman’s rank correlation coefficient.ResultsFor point dose comparison, the averaged dose differences (± standard deviations) were 1.6 ± 0.73% for all the cases. For planar dose distribution, the mean gamma passing rate for 3%/1 mm, and 2%/2 mm evaluation criteria were 94.26% ± 1.89%, and 93.86% ± 2.16%, respectively. The gamma passing rates were higher than 90% for all the delivery quality assurance plans with the criteria of 3%/1 mm and 2%/2 mm. The difference in point dose was lowly correlated with volume of PTV, number of beams, and treatment time for 150 DQA plans, and highly correlated with volume of PTV for 18 DQA plans of small target. DQA gamma passing rate (2%/2 mm) was a moderate significant correlation for the number of nodes, number of beams and treatment time, and a low correlation with MU.ConclusionPTW31016 PinPoint ionization chamber and EBT3 film can be used for routine Cyberknife delivery quality assurance. The point dose difference should be within 3%. The gamma passing rate should be higher than 90% for the criteria of 3%/1 mm and 2%/2 mm. In addition, the plan complexity and PTV volume were found to have some influence on the plan deliverability.

scholarly journals PD-0443: Clinical evaluation of an innovative ionization chamber technology for patient quality assurance

2015 ◽  
Vol 115 ◽  
pp. S216-S217
Author(s):  
M. Togno ◽  
D. Menichelli ◽  
O. Morin ◽  
M. Oechsner ◽  
J.J. Wilkens
Keyword(s):  
Quality Assurance ◽  
Clinical Evaluation ◽  
Ionization Chamber
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