Zhijun Wang1,2, Eberhard Hansis3, Rongxin Chen1, Rafael Duran1, Julius Chapiro1, Yun Robert Sheu1, Hicham Kobeiter4, Michael Grass3, Jean-François Geschwind5, MingDe Lin5,6. 1. a Russell H. Morgan Department of Radiology and Radiological Science, Division of Vascular and Interventional Radiology , The Johns Hopkins Hospital , Baltimore , MD , USA ; 2. b Interventional Radiology Department , Chinese PLA General Hospital , Beijing , China ; 3. c Philips Research , Hamburg , Germany ; 4. d Service d'Imagerie Médicale, Unité de Radiologie interventionnelle et thérapeutique Vasculaire et Oncologique, Université Paris-Est Créteil, Assistance Publique-Hôpitaux de Paris, Centre Hospitalo-Universitaire Henri Mondor , France ; 5. e Yale University School of Medicine, Department of Radiology and Biomedical Imaging , New Haven , CT , USA ; 6. f U/S Imaging and Interventions (UII), Philips Research North America , Cambridge , MA , USA.
Abstract
PURPOSE: To evaluate the technical feasibility of automatically removing the ribs and spine from C-arm cone-beam computed tomography (CBCT) images acquired during transcatheter arterial chemoembolization (TACE). MATERIAL AND METHODS: Fifty-eight patients (45.8 ± 5.0 years) with unresectable hepatocellular carcinoma (HCC) underwent transcatheter arterial chemoembolization and had intraprocedural CBCT imaging. Automatic bone removal was performed using model-based segmentation of the ventral cavity. Two interventional radiologists independently evaluated the performance of bone removal, remaining soft tissue retention, and general usability (where both the bone is appropriately removed while retaining soft tissue) for 3D TACE planning on a four-level (complete/excellent, adequate/good, incomplete/questionable, insufficient/bad) score. The proportion of inter-reader agreement was calculated. RESULTS: For ribs and spine removal, 98.3-100% and 100% of cases showed complete or adequate performance, respectively. In 96.6% of the cases, soft tissue was at least adequately retained. 91.3-93.1% of the cases demonstrated good or excellent general usability for TACE planning. Satisfactory inter-reader agreement proportion was achieved in ribs (93.1%) and spine removal (89.7%), soft tissue retention (84.5%), and general usability for TACE planning (72.4%). CONCLUSION: Intraprocedural automatic bone removal on CBCT images is technically feasible and offers good removal of ribs and spine while preserving soft tissue. Its clinical value needs further assessment.
PURPOSE: To evaluate the technical feasibility of automatically removing the ribs and spine from C-arm cone-beam computed tomography (CBCT) images acquired during transcatheter arterial chemoembolization (TACE). MATERIAL AND METHODS: Fifty-eight patients (45.8 ± 5.0 years) with unresectable hepatocellular carcinoma (HCC) underwent transcatheter arterial chemoembolization and had intraprocedural CBCT imaging. Automatic bone removal was performed using model-based segmentation of the ventral cavity. Two interventional radiologists independently evaluated the performance of bone removal, remaining soft tissue retention, and general usability (where both the bone is appropriately removed while retaining soft tissue) for 3D TACE planning on a four-level (complete/excellent, adequate/good, incomplete/questionable, insufficient/bad) score. The proportion of inter-reader agreement was calculated. RESULTS: For ribs and spine removal, 98.3-100% and 100% of cases showed complete or adequate performance, respectively. In 96.6% of the cases, soft tissue was at least adequately retained. 91.3-93.1% of the cases demonstrated good or excellent general usability for TACE planning. Satisfactory inter-reader agreement proportion was achieved in ribs (93.1%) and spine removal (89.7%), soft tissue retention (84.5%), and general usability for TACE planning (72.4%). CONCLUSION: Intraprocedural automatic bone removal on CBCT images is technically feasible and offers good removal of ribs and spine while preserving soft tissue. Its clinical value needs further assessment.
Authors: Olivier Ecabert; Jochen Peters; Hauke Schramm; Cristian Lorenz; Jens von Berg; Matthew J Walker; Mani Vembar; Mark E Olszewski; Krishna Subramanyan; Guy Lavi; Jürgen Weese Journal: IEEE Trans Med Imaging Date: 2008-09 Impact factor: 10.048
Authors: Xiaodong Wang; Rajesh P Shah; Majid Maybody; Karen T Brown; George I Getrajdman; Carsten Stevenson; Elena N Petre; Stephen B Solomon Journal: J Vasc Interv Radiol Date: 2011-05-05 Impact factor: 3.464