PURPOSE: To compare coronary atherosclerotic plaque characterization using multicontrast MRI on: 1) freshly excised vessels under simulated in vivo conditions, and 2) preserved vessels. MATERIALS AND METHODS: T1-weighted (T1W), T2-weighted (T2W), proton density-weighted (PDW), and diffusion-weighted (DW) MR images were acquired on 13 freshly excised human coronary arteries from explanted hearts. Vessels were imaged in an MR-compatible tissue culture chamber using a 4.7 Tesla small-bore MR scanner. Eight vessels were then preserved in buffered formalin and rescanned following the same imaging protocol. A three-dimensional spatially penalized fuzzy C-means (3D-SPFCM) technique was applied to classify different plaque constituents. The classification results from vessels under "fresh" and "preserved" conditions were compared with corresponding histological sections. RESULTS: For most plaque constituents, the plaque characterization results show no significant difference between fresh and preserved scans, and little difference between scans and the histological reference standard. In the case of thrombus, apparent signal changes between fresh and preserved images were identified. Overall, MR scans conducted under preserved conditions provided a 1.8% to 17.5% greater signal-to-noise ratio (SNR) than those conducted in the fresh stage. CONCLUSION: Preservation of coronary vessels did not alter the contrast between plaque tissues on multicontrast MRI, and did not significantly change the results of plaque constituent characterization. Copyright (c) 2006 Wiley-Liss, Inc.
PURPOSE: To compare coronary atherosclerotic plaque characterization using multicontrast MRI on: 1) freshly excised vessels under simulated in vivo conditions, and 2) preserved vessels. MATERIALS AND METHODS: T1-weighted (T1W), T2-weighted (T2W), proton density-weighted (PDW), and diffusion-weighted (DW) MR images were acquired on 13 freshly excised human coronary arteries from explanted hearts. Vessels were imaged in an MR-compatible tissue culture chamber using a 4.7 Tesla small-bore MR scanner. Eight vessels were then preserved in buffered formalin and rescanned following the same imaging protocol. A three-dimensional spatially penalized fuzzy C-means (3D-SPFCM) technique was applied to classify different plaque constituents. The classification results from vessels under "fresh" and "preserved" conditions were compared with corresponding histological sections. RESULTS: For most plaque constituents, the plaque characterization results show no significant difference between fresh and preserved scans, and little difference between scans and the histological reference standard. In the case of thrombus, apparent signal changes between fresh and preserved images were identified. Overall, MR scans conducted under preserved conditions provided a 1.8% to 17.5% greater signal-to-noise ratio (SNR) than those conducted in the fresh stage. CONCLUSION: Preservation of coronary vessels did not alter the contrast between plaque tissues on multicontrast MRI, and did not significantly change the results of plaque constituent characterization. Copyright (c) 2006 Wiley-Liss, Inc.
Authors: Mushabbar A Syed; John N Oshinski; Charles Kitchen; Arshad Ali; Richard J Charnigo; Arshed A Quyyumi Journal: Int J Cardiovasc Imaging Date: 2009-05-21 Impact factor: 2.357
Authors: Mihály Károlyi; Harald Seifarth; Gary Liew; Christopher L Schlett; Pál Maurovich-Horvat; Paul Stolzmann; Guangping Dai; Shuning Huang; Craig J Goergen; Masataka Nakano; Fumiyuki Otsuka; Renu Virmani; Udo Hoffmann; David E Sosnovik Journal: JACC Cardiovasc Imaging Date: 2013-03-14
Authors: Feiyu Li; Mary McGrae McDermott; Debiao Li; Timothy J Carroll; Daniel S Hippe; Christopher M Kramer; Zhaoyang Fan; Xihai Zhao; Thomas S Hatsukami; Baocheng Chu; Jinnan Wang; Chun Yuan Journal: J Cardiovasc Magn Reson Date: 2010-07-01 Impact factor: 5.364