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

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.

3D Dosimetric verification of volumetric-modulated arc therapy by portal dosimetry

2010 ◽  
Vol 94 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Anton Mans ◽  
Peter Remeijer ◽  
Igor Olaciregui-Ruiz ◽  
Markus Wendling ◽  
Jan-Jakob Sonke ◽  
...  
Keyword(s):  
Volumetric Modulated Arc Therapy ◽  
Portal Dosimetry ◽  
Arc Therapy ◽  
Dosimetric Verification
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