SU-E-T-57: Estimation of Uncertainty in Dose Delivery Due to MLC Position Inaccuracies by Inverse Derivative Method during Volumetric Modulated Arc Therapy Delivery by Elekta Beam Modulator

2012 ◽  
Vol 39 (6Part10) ◽  
pp. 3715-3715
Author(s):  
B Sarkar ◽  
M Nandy ◽  
A Manikandan ◽  
P Basu ◽  
N Sujatha ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Dose Delivery ◽  
Arc Therapy ◽  
Derivative Method ◽  
Estimation Of Uncertainty ◽  
Therapy Delivery

scholarly journals Couch Displacement Effects on Volumetric Modulated Arc Therapy Delivery and Verification of Simplified Couch Structure

2017 ◽  
Vol 63 (6) ◽  
pp. 458-466
Author(s):  
CHIE KUROKAWA ◽  
KANA ITO ◽  
KAZUYA AOKI ◽  
TAKAYUKI FUJITA ◽  
SHUICHI OZAWA ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy ◽  
Displacement Effects ◽  
Therapy Delivery

Novel Spiral Phantom for Volumetric Modulated Arc Therapy Delivery Verification

2010 ◽  
Vol 78 (3) ◽  
pp. S769
Author(s):  
M. Tanooka ◽  
T. Sakai ◽  
H. Inoue ◽  
H. Doi ◽  
Y. Takada ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy ◽  
Delivery Verification ◽  
Therapy Delivery

scholarly journals Simultaneous MV‐kV imaging for intrafractional motion management during volumetric‐modulated arc therapy delivery*

2016 ◽  
Vol 17 (2) ◽  
pp. 473-486 ◽  
Author(s):  
Margie A. Hunt ◽  
Mark Sonnick ◽  
Hai Pham ◽  
Rajesh Regmi ◽  
Jian‐ping Xiong ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Motion Management ◽  
Arc Therapy ◽  
Intrafractional Motion ◽  
Therapy Delivery

1096 poster NOVEL SPIRAL PHANTOM FOR VOLUMETRIC MODULATED ARC THERAPY DELIVERY VERIFICATION

2011 ◽  
Vol 99 ◽  
pp. S408
Author(s):  
M. Tanooka ◽  
H. Inoue ◽  
H. Doi ◽  
Y. Takada ◽  
M. Fujiwara ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy ◽  
Delivery Verification ◽  
Therapy Delivery

scholarly journals Impact of delivery characteristics on dose delivery accuracy of volumetric modulated arc therapy for different treatment sites

2019 ◽  
Vol 60 (5) ◽  
pp. 603-611 ◽  
Author(s):  
Jiaqi Li ◽  
Xile Zhang ◽  
Jun Li ◽  
Rongtao Jiang ◽  
Jing Sui ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Dose Delivery ◽  
Small Aperture ◽  
Passing Rates ◽  
Pearson's R ◽  
Arc Therapy ◽  
Key Factor ◽  
Delivery Accuracy ◽  
The Impact ◽  
Pearson’S R

Abstract This study aimed to investigate the impact of delivery characteristics on the dose delivery accuracy of volumetric modulated arc therapy (VMAT) for different treatment sites. The pretreatment quality assurance (QA) results of 344 VMAT patients diagnosed with gynecological (GYN), head and neck (H&N), rectal or prostate cancer were randomly chosen in this study. Ten metrics reflecting VMAT delivery characteristics were extracted from the QA plans. Compared with GYN and rectal plans, H&N and prostate plans had higher aperture complexity and monitor units (MU), and smaller aperture area. Prostate plans had the smallest aperture area and lowest leaf speed compared with other plans (P < 0.001). No differences in gantry speed were found among the four sites. The gamma passing rates (GPRs) of GYN, rectal and H&N plans were inversely associated with union aperture area (UAA) and leaf speed (Pearson’s r: −0.39 to −0.68). GPRs of prostate plans were inversely correlated with aperture complexity, MU and small aperture score (SAS) (absolute Pearson’s r: 0.34 to 0.49). Significant differences in GPR between high SAS and low SAS subgroups were found only when leaf speed was <0.42 cm s–1 (P < 0.001). No association of GPR with gantry speed was found in four sites. Leaf speed was more strongly associated with UAA. Aperture complexity and MU were more strongly associated with SAS. VMAT plans from different sites have distinct delivery characteristics. Affecting dose delivery accuracy, leaf speed is the key factor for GYN, rectal and H&N plans, while aperture complexity, MU and small apertures have a higher influence on prostate plans.

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