关键词: 颈动脉; 磁共振成像; 高分辨磁共振斑块成像; 三维重建

Abstract:

Objective To study the application value of three dimensional-T2 weighted imaging-sampling perfection with application optimized contrasts using different flip angle evolutions (3D-T2WISPACE) sequence in carotid high-resolution magnetic resonance imaging (MRI). Methods Thirty patients with suspected carotid disease were recruited in this study. Highresolution multicontrast MRI was performed using 3.0T MRI with a 4-channel surface carotid coil. 3D-T2WI-SPACE sequence was applied by coronal plane; and oblique saggital and axial images were reconstructed using post-processing software. Signal-to-noise ratio, image quality of 3D-T2WI-SPACE sequence and axial high-resolution T2WI sequence, as well as scan coverage and diagnostic information were compared. Results Among all sixty carotids, thirteen vessels are normal, and forty-four carotids were found plaques; one was carotid dissection; and two were idiopathic stenosis. For the image quality of 3D-T2WI-SPACE sequence and T2WI sequence, there were 5 cases and 4 cases with II grade, and 25 cases and 26 cases with III grade, respectively. 3D-T2WI-SPACE can provide more diagnostic information than T2WI. The coverage of SPACE and T2WI sequence were (114.7±22.4) mm and 46 mm, respectively. There was no significant difference between signal-to-noise ratio of 3D-T2WISPACE (15.7±3.5) and T2W (22.7±14.7) (P =0.163). Conclusion 3D-T2WI-SPACE sequence can be used as an important sequence in carotid highresolution MRI. This 3D sequence can provide large scan coverage and more important information for carotid imaging.

Key words: Carotid; Magnetic resonance imaging; High-resolution plaque magnetic resonance
imaging; Three-dimensional reconstruction