| MRI signal intensity based B-spline nonrigid registration for pre- and intraoperative imaging during prostate brachytherapy. | |
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MedLine Citation:
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PMID: 19856437 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To apply an intensity-based nonrigid registration algorithm to MRI-guided prostate brachytherapy clinical data and to assess its accuracy. MATERIALS AND METHODS: A nonrigid registration of preoperative MRI to intraoperative MRI images was carried out in 16 cases using a Basis-Spline algorithm in a retrospective manner. The registration was assessed qualitatively by experts' visual inspection and quantitatively by measuring the Dice similarity coefficient (DSC) for total gland (TG), central gland (CG), and peripheral zone (PZ), the mutual information (MI) metric, and the fiducial registration error (FRE) between corresponding anatomical landmarks for both the nonrigid and a rigid registration method. RESULTS: All 16 cases were successfully registered in less than 5 min. After the nonrigid registration, DSC values for TG, CG, PZ were 0.91, 0.89, 0.79, respectively, the MI metric was -0.19 +/- 0.07 and FRE presented a value of 2.3 +/- 1.8 mm. All the metrics were significantly better than in the case of rigid registration, as determined by one-sided t-tests. CONCLUSION: The intensity-based nonrigid registration method using clinical data was demonstrated to be feasible and showed statistically improved metrics when compare to only rigid registration. The method is a valuable tool to integrate pre- and intraoperative images for brachytherapy. |
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Authors:
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Sota Oguro; Junichi Tokuda; Haytham Elhawary; Steven Haker; Ron Kikinis; Clare M C Tempany; Nobuhiko Hata |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 30 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-10-29 Completed Date: 2010-01-21 Revised Date: 2011-09-26 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 1052-8 Citation Subset: IM |
Affiliation:
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Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Algorithms Brachytherapy / methods* Brain / pathology Diagnostic Imaging / methods Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging / methods* Male Middle Aged Models, Statistical Prostate / pathology*, radiation effects* Prostatic Neoplasms / pathology, radiotherapy* Reproducibility of Results Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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1R01CA111288/CA/NCI NIH HHS; 3P41RR013218/RR/NCRR NIH HHS; 5P01CA067165/CA/NCI NIH HHS; 5R01CA109246/CA/NCI NIH HHS; 5U41RR019703/RR/NCRR NIH HHS; 5U54EB005149/EB/NIBIB NIH HHS; P01 CA067165-110002/CA/NCI NIH HHS; R01 CA109246-05/CA/NCI NIH HHS; R01 CA111288-04/CA/NCI NIH HHS; U41 RR019703-04/RR/NCRR NIH HHS; U54 EB005149-04/EB/NIBIB NIH HHS |
| Comments/Corrections | |
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