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

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

Radiology and Oncology
Volume 51 (2017): Issue 4 (December 2017)
By: Wannapha Nobnop,  Imjai Chitapanarux,  Hudsaleark Neamin,  Somsak Wanwilairat,  Vicharn Lorvidhaya and  Taweap Sanghangthum  
Open Access
|Sep 2017

Figures & Tables

Figure 1

The diagram of the study workflow for dose accumulation and dose comparison.
The diagram of the study workflow for dose accumulation and dose comparison.

Figure 2

The percent ratio to the volume at the initial treatment planning of (A) gross target volume GTV, (B) clinical target volume CTV, (C) right parotid gland, and (D) left parotid gland.
The percent ratio to the volume at the initial treatment planning of (A) gross target volume GTV, (B) clinical target volume CTV, (C) right parotid gland, and (D) left parotid gland.

Figure 3

Histogram of (A) the dice similarity coefficients (DSC) for all of the targets and organs at risk and (B) the inverse consistency error (ICE) in each treatment week and by asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable image registration (DIR) methods.
Histogram of (A) the dice similarity coefficients (DSC) for all of the targets and organs at risk and (B) the inverse consistency error (ICE) in each treatment week and by asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable image registration (DIR) methods.

Figure 4

The 1st day MVCT image showing the original bilateral parotid gland (A) and the MVCT image at the 31st fraction showing the automatic deformed contour (B) from the AsyDM method. The initial planned dose distribution on the 1st day MVCT image (C) which was used to compare with the accumulated dose distribution at the end of the treatment (D).
The 1st day MVCT image showing the original bilateral parotid gland (A) and the MVCT image at the 31st fraction showing the automatic deformed contour (B) from the AsyDM method. The initial planned dose distribution on the 1st day MVCT image (C) which was used to compare with the accumulated dose distribution at the end of the treatment (D).

Figure 5

Cumulative dose comparison, calculated by the asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable registration methods of gross tumour volume (GTV) for (A) median dose, D50(B) near-minimum dose, D98 and (C) near-maximum dose, D2 and clinical tumour volume (CTV) for (D) median dose, D50(E) near-minimum dose, D98, and (F) near-maximum dose, D2. The reference (Ref) accumulated dose was computed by summing the weekly doses corresponding to the weekly MVCTs defined by the radiation oncologist.
Cumulative dose comparison, calculated by the asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable registration methods of gross tumour volume (GTV) for (A) median dose, D50(B) near-minimum dose, D98 and (C) near-maximum dose, D2 and clinical tumour volume (CTV) for (D) median dose, D50(E) near-minimum dose, D98, and (F) near-maximum dose, D2. The reference (Ref) accumulated dose was computed by summing the weekly doses corresponding to the weekly MVCTs defined by the radiation oncologist.

Figure 6

Cumulative dose comparison, calculated from the asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable registration methods in mean dose, Dmean, of (A) right parotid gland and (B) left parotid gland, and near-maximum dose, D2, of (C) spinal cord.
Cumulative dose comparison, calculated from the asymmetric Horn and Schunck (AsyHS), asymmetric demon (AsyDM), symmetric Horn and Schunck (SymHS), and symmetric demon (SymDM) deformable registration methods in mean dose, Dmean, of (A) right parotid gland and (B) left parotid gland, and near-maximum dose, D2, of (C) spinal cord.

Figure 7

Cumulative dose comparison, derived from helical tomotherapy planned adaptive software (HT) and DIRART software in median dose, D50, of (A) right parotid gland and (B) left parotid gland.
Cumulative dose comparison, derived from helical tomotherapy planned adaptive software (HT) and DIRART software in median dose, D50, of (A) right parotid gland and (B) left parotid gland.
DOI: https://doi.org/10.1515/raon-2017-0033 | Journal eISSN: 1581-3207 | Journal ISSN: 1318-2099
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Language: English
Page range: 438 - 446
Submitted on: Jun 3, 2017
|
Accepted on: Jul 16, 2017
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Published on: Sep 15, 2017
Published by: Association of Radiology and Oncology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
deformable image registration,
dose accumulation,
nasopharyngeal cancer,
MVCT,
helical tomotherapy
Related subjects:
Medicine,
Clinical medicine,
Internal medicine,
Haematology, oncology,
Radiology

© 2017 Wannapha Nobnop, Imjai Chitapanarux, Hudsaleark Neamin, Somsak Wanwilairat, Vicharn Lorvidhaya, Taweap Sanghangthum, published by Association of Radiology and Oncology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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