SU-E-T-604: Dosimetric Dependence On the Collimator Angle in Prostate Volumetric Modulated Arc Therapy

2014 ◽  
Vol 41 (6Part21) ◽  
pp. 366-367
Author(s):  
m khan ◽  
j rehman ◽  
M Khan ◽  
J Chow
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Collimator Angle ◽  
Arc Therapy

Dynamic Collimator Angle Adjustments During Volumetric Modulated Arc Therapy to Account for Prostate Rotations

2015 ◽  
Vol 91 (5) ◽  
pp. 1009-1016 ◽  
Author(s):  
Johan de Boer ◽  
Anne Lisa Wolf ◽  
Yenny Z. Szeto ◽  
Marcel van Herk ◽  
Jan-Jakob Sonke
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Collimator Angle ◽  
Arc Therapy

scholarly journals Impact of Collimator Angle on Deliverability of Volumetric Modulated Arc Therapy (VMAT)

2016 ◽  
Vol 96 (2) ◽  
pp. E632
Author(s):  
D. Hong ◽  
I. Bundalevski ◽  
K. Wong ◽  
B.E. Mokhtar ◽  
H. Ashamalla ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Collimator Angle ◽  
Arc Therapy

SU-G-BRC-04: Collimator Angle Optimization in Volumetric Modulated Arc Therapy

2016 ◽  
Vol 43 (6Part24) ◽  
pp. 3627-3627
Author(s):  
A Andersen ◽  
C Johnson ◽  
G Bartlett ◽  
I Das
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Collimator Angle ◽  
Arc Therapy

The importance of collimator angle error in volumetric-modulated arc therapy

2015 ◽  
pp. 1-8
Author(s):  
Vicente Puchades-Puchades ◽  
Alfredo Serna-Berná ◽  
Fernando Mata-Colodro ◽  
David Ramos-Amores ◽  
Miguel Alcaraz-Baños
Keyword(s):  
High Risk ◽  
Organs At Risk ◽  
Volumetric Modulated Arc Therapy ◽  
Target Volume ◽  
Low Risk ◽  
Angle Error ◽  
Dose Volume Histograms ◽  
Original Plan ◽  
Collimator Angle ◽  
Arc Therapy

AbstractPurposeTo evaluate the dosimetric errors associated with the effect of the collimator angle error in volumetric-modulated arc therapy (VMAT) treatments.Methods and materialsFour patients with different planning target volume (PTV) and localisations treated using VMAT were analysed (high-risk prostate, low-risk prostate, head and neck (H&N) and holocranial with hippocampus protection) in terms of dosimetric variations when errors in the collimator angle were introduced. Original plans underwent modifications of the planned collimator angles of ±0·5°, ±1° and ±1·5°. These modified plans were re-calculated using the same original plan fluencies, and the resulting dose–volume histograms and homogeneity index (HI-ICRU) were compared.ResultsFor the high-risk prostate case, there was a noticeable loss of PTV dose coverage for collimator angle errors larger than ±1°, with HI-ICRU relative variations up to 75% in the range analysed. The low-risk prostate case did not present significant changes in organs at risk or PTV dose coverage. For the H&N case, the spinal cord presented changes around 4% forD0·1 cc. In the holocranial case, optic lens showed dose variations up to 5% for collimator angle errors larger than ±1°.ConclusionsThe effect of the collimator error in VMAT increased as the PTV increased.For selecting the position of the isocentre, one should be cautious, and whenever possible choose a position close to the geometrical centre of the PTVs in order to avoid or minimise errors from the calibration of the collimator angle.

scholarly journals Effect of the collimator angle on dosimetric verification of volumetric modulated arc therapy

2015 ◽  
Vol 67 (1) ◽  
pp. 243-247 ◽  
Author(s):  
Yong Ho Kim ◽  
Ha Ryung Park ◽  
Won Taek Kim ◽  
Dong Won Kim ◽  
Yongkan Ki ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Collimator Angle ◽  
Arc Therapy ◽  
Dosimetric Verification

Quality assurance of volumetric modulated arc therapy using Elekta Synergy

2009 ◽  
pp. 1-5 ◽  
Author(s):  
Akihiro Haga ◽  
Keiichi Nakagawa ◽  
Kenshiro Shiraishi ◽  
Saori Itoh ◽  
Atsuro Terahara ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy

scholarly journals Physical dosimetry of volumetric modulated arc therapy (VMAT) using EPID and 2D array for quality assurance

2018 ◽  
Vol 49 (2) ◽  
pp. 477-484
Author(s):  
Ismail E. Mohamed ◽  
Ayman G. Ibrahim ◽  
Hamdy M. Zidan ◽  
Hesham S. El-Bahkiry ◽  
Adel Y. El-sahragti
Keyword(s):  
Quality Assurance ◽  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy ◽  
2D Array
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