关键词: 能谱成像; 计算机断层扫描; 容积螺旋穿梭扫描; 全脑灌注; 脑血管成像

Abstract:

【Abstract】 Objective To discuss the value of GE Discovery CT750 HD 110 mm volume helical shuttle scanning in whole brain perfusion and cerebral vascular joint imaging. Methods Using GE Discovery CT750 HD, after contrast agent injection, volume helical shuttle scanning to the range of 110 mm from the base to top of the head was applied. Whole brain perfusion and cerebral vascular image of 56 patients were constructed. At the same time in the same machine through the conventional scan model, 100 cases of cerebral artery reconstruction, 25 cases of cerebral venous 3D reconstruction imaging, and 80 cases of brain perfusion were selected. All the cases of image mentioned above were used to establish database respectively. For the volume helical scan model, 20 cases of cerebral perfusion images were selected randomly, 20 cases of cerebral arteries reconstructed 3D images and cerebral arteries thin-layer maximum intensity projection(MIP) images were randomly selected in accordance with the random from 44 patients without moyamoya disease, 15 cases were selected from 17 cases of cerebral venous reconstruction images, these images were respectively compared on image quality to the images with the same amount and types selected from the conventional scan model. Then value of application of GE Discovery CT750 HD 110 mm volume helical shuttle scanning in whole brain perfusion and cerebral vascular joint imaging was discussed. Results As to image quality, the difference of brain perfusion and vein reconstruction of volume helical shuttle scanning and conventional scanning pattern had no statistical significance, the scores and statistics results respectively were:brain perfusion image:4.00(3.00, 4.00) vs 4.00(3.00, 4.00), P=0.477, cerebral venous reconstruction image:5.00(4.00, 5.00) vs 4.00(4.00, 5.00), P=0.119. The image quality of cerebral artery thin-section MIP images of volume helical shuttle scanning was better than the conventional scanning mode, the scores and statistics results respectively were:4.00(4.00, 5.00) vs 4.00(4.00, 4.00), P=0.016. The image quality of cerebral artery reconstruction image of volume helical shuttle scanning was worse than the conventional scanning mode, the scores and statistics results respectively were:3.00(3.00, 4.00) vs 4.00(4.00, 5.00), P＜0.001. Conclusion GE Discovery CT750 HD 110 mm volume helical shuttle scanning could be effectively used for comprehensive imaging evaluation of cerebrovascular disease patients.

Key words: Spectral imaging; Computed tomography; Volume shuttle scanning; Whole brain perfusion; Cerebral vascular imaging