Image registration of pre-procedural MRI and intra-procedural CT images to aid CT-guided percutaneous cryoablation of renal tumors
| Autor: | Kemal Tuncali, Haytham Elhawary, Nobuhiko Hata, Stuart G. Silverman, Sota Oguro, Paul T. Morrison |
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| Rok vydání: | 2010 |
| Předmět: |
Male
medicine.medical_specialty medicine.medical_treatment Biomedical Engineering Image registration Health Informatics Image processing Cryosurgery Preoperative care Article Monitoring Intraoperative Preoperative Care Image Processing Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Aged Retrospective Studies Aged 80 and over Percutaneous cryoablation medicine.diagnostic_test business.industry Magnetic resonance imaging Cryoablation General Medicine Middle Aged Magnetic Resonance Imaging Computer Graphics and Computer-Aided Design Kidney Neoplasms Computer Science Applications Female Surgery Computer Vision and Pattern Recognition Radiology Tomography Tomography X-Ray Computed business |
| Zdroj: | International Journal of Computer Assisted Radiology and Surgery. 6:111-117 |
| ISSN: | 1861-6429 1861-6410 |
| DOI: | 10.1007/s11548-010-0485-9 |
| Popis: | To determine whether a non-rigid registration (NRR) technique was more accurate than a rigid registration (RR) technique when fusing pre-procedural contrast-enhanced MR images to unenhanced CT images during CT-guided percutaneous cryoablation of renal tumors.Both RR and NRR were applied retrospectively to 11 CT-guided percutaneous cryoablation procedures performed to treat renal tumors (mean diameter; 23 mm). Pre-procedural contrast-enhanced MR images of the upper abdomen were registered to unenhanced intra-procedural CT images obtained just prior to the ablation. RRs were performed manually, and NRRs were performed using an intensity-based approach with affine and Basis-Spline techniques used for modeling displacement. Registration accuracy for each technique was assessed using the 95% Hausdorff distance (HD), Fiducial Registration Error (FRE) and the Dice Similarity Coefficient (DSC). Statistical differences were analyzed using a two-sided Student's t-test. Time for each registration technique was recorded.Mean 95% HD (1.7 mm), FRE (1.7 mm) and DSC (0.96) using the NRR technique were significantly better than mean 95% HD (6.4 mm), FRE (5.0 mm) and DSC (0.88) using the RR technique (P0.05 for each analysis). Mean registration times of NRR and RR techniques were 15.2 and 5.7 min, respectively.The non-rigid registration technique was more accurate than the rigid registration technique when fusing pre-procedural MR images to intra-procedural unenhanced CT images. The non-rigid registration technique can be used to improve visualization of renal tumors during CT-guided cryoablation procedures. |
| Databáze: | OpenAIRE |
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