scholarly journals The impact of robustness of deformable image registration on contour propagation and dose accumulation for head and neck adaptive radiotherapy

2018 ◽  
Vol 19 (4) ◽  
pp. 185-194 ◽  
Author(s):  
Lian Zhang ◽  
Zhi Wang ◽  
Chengyu Shi ◽  
Tengfei Long ◽  
X. George Xu
Keyword(s):  
Image Registration ◽  
Head And Neck ◽  
Deformable Image Registration ◽  
Adaptive Radiotherapy ◽  
Dose Accumulation ◽  
Contour Propagation ◽  
The Impact

Deformable image registration based automatic CT-to-CT contour propagation for head and neck adaptive radiotherapy in the routine clinical setting

2014 ◽  
Vol 41 (12) ◽  
pp. 121712 ◽  
Author(s):  
Akila Kumarasiri ◽  
Farzan Siddiqui ◽  
Chang Liu ◽  
Raphael Yechieli ◽  
Mira Shah ◽  
...  
Keyword(s):  
Image Registration ◽  
Head And Neck ◽  
Clinical Setting ◽  
Deformable Image Registration ◽  
Adaptive Radiotherapy ◽  
Contour Propagation ◽  
Routine Clinical Setting

scholarly journals Evaluation of deformable image registration (DIR) methods for dose accumulation in nasopharyngeal cancer patients during radiotherapy

2017 ◽  
Vol 51 (4) ◽  
pp. 438-446 ◽  
Author(s):  
Wannapha Nobnop ◽  
Imjai Chitapanarux ◽  
Hudsaleark Neamin ◽  
Somsak Wanwilairat ◽  
Vicharn Lorvidhaya ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Image Registration ◽  
Treatment Plan ◽  
Nasopharyngeal Cancer ◽  
Treatment Strategies ◽  
Deformable Image Registration ◽  
Organ Dose ◽  
Target Dose ◽  
Dose Accumulation ◽  
The Impact

Abstract Introduction Deformable image registration (DIR) is used to modify structures according to anatomical changes for observing the dosimetric effect. In this study, megavoltage computed tomography (MVCT) images were used to generate cumulative doses for nasopharyngeal cancer (NPC) patients by various DIR methods. The performance of the multiple DIR methods was analysed, and the impact of dose accumulation was assessed. Patients and methods The study consisted of five NPC patients treated with a helical tomotherapy unit. The weekly MVCT images at the 1st, 6th, 11th, 16th, 21st, 26th, and 31st fractions were used to assess the dose accumulation by the four DIR methods. The cumulative dose deviations from the initial treatment plan were analysed, and correlations of these variations with the anatomic changes and DIR methods were explored. Results The target dose received a slightly different result from the initial plan at the end of the treatment. The organ dose differences increased as the treatment progressed to 6.8% (range: 2.2 to 10.9%), 15.2% (range: -1.7 to 36.3%), and 6.4% (range: -1.6 to 13.2%) for the right parotid, the left parotid, and the spinal cord, respectively. The mean uncertainty values to estimate the accumulated doses for all the DIR methods were 0.21 ± 0.11 Gy (target dose), 1.99 ± 0.76 Gy (right parotid), 1.19 ± 0.24 Gy (left parotid), and 0.41 ± 0.04 Gy (spinal cord). Conclusions Accuracy of the DIR methods affects the estimation of dose accumulation on both the target dose and the organ dose. The DIR methods provide an adequate dose estimation technique for observation as a result of inter-fractional anatomic changes and are beneficial for adaptive treatment strategies.

The Role of Regularization in Deformable Image Registration for Head and Neck Adaptive Radiotherapy

2013 ◽  
Vol 12 (4) ◽  
pp. 323-331 ◽  
Author(s):  
D. Ciardo ◽  
M. Peroni ◽  
M. Riboldi ◽  
D. Alterio ◽  
G. Baroni ◽  
...  
Keyword(s):  
Image Registration ◽  
Head And Neck ◽  
Deformable Image Registration ◽  
Adaptive Radiotherapy

scholarly journals PO-0935: Evaluation of deformable image registration methods for dose monitoring in head and neck adaptive radiotherapy

2015 ◽  
Vol 115 ◽  
pp. S488-S489 ◽  
Author(s):  
B. Rigaud ◽  
A. Simon ◽  
J. Castelli ◽  
M. Gobeli ◽  
J.D. Ospina Arango ◽  
...  
Keyword(s):  
Image Registration ◽  
Head And Neck ◽  
Deformable Image Registration ◽  
Adaptive Radiotherapy ◽  
Dose Monitoring
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