Sakai O, Shen Y, Takata Y, Furuse M
Department of Radiology, Jichi Medical School and Hospital, Tochigi, Japan.
Comput Med Imaging Graph. 1997 May-Jun;21(3):153-64. doi: 10.1016/s0895-6111(97)00004-9.
We evaluated the use of deblurring technique by digital deconvolution for improving the longitudinal resolution in helical CT in a phantom and CT images of head and neck patients. After performing the helical scanning, overlapped axial images were reconstructed at 1/10 of the actual collimation. Then, the deblurring technique was performed. Results revealed that the resolution of slice profiles was improved after deblurring. Further, the longitudinal resolution increased as the strength of the deconvolution increased, at the expense of an increase in helical artifacts. The sharpness and visualization of horizontally running structures were improved in the reconstructed MPR, MPVR, MIP and 3D images in both the phantom and the images of all patients. Also, visualization of the peripheral vessels in CTAs was improved.
我们在体模以及头颈部患者的CT图像中，评估了通过数字去卷积进行去模糊技术在改善螺旋CT纵向分辨率方面的应用。进行螺旋扫描后，以实际准直的1/10重建重叠的轴向图像。然后，实施去模糊技术。结果显示，去模糊后切片轮廓的分辨率得到改善。此外，纵向分辨率随着去卷积强度的增加而提高，但代价是螺旋伪影增加。在体模和所有患者的图像的重建多平面重组（MPR）、多平面容积再现（MPVR）、最大密度投影（MIP）和三维（3D）图像中，水平走行结构的清晰度和可视化效果得到改善。此外，CT血管造影（CTA）中外周血管的可视化效果也得到改善。
