摘要
目的探讨多层螺旋CT层厚和螺距的选择对多平面重建图像质量的影响。材料与方法选择1mm.3mm探测器线宽及3.5及5.5螺距四种组合对一幅完整人类头颅骨标本行多层螺旋CT扫描。重建采用1mm及3mm有效层厚及0.5和1.5mm的50%重叠重建。多平面重建选择垂直于听眶线的冠状面重建。结果四组图像均获得高质量冠状位多平面重建图像,以1mm层厚,3.5螺距组图像质量最佳,对细微结构的显示1mm有效层厚获得MPR高于3mm层厚,而螺距影响不大。结论多层螺旋CT层厚影响MPR图像质量的决定因素,而螺距对图像质量影响不大。
Objective To investigate the impact of slice thickness and picth on the image quality of multiplanar reformationsMPRusing multislice spiral CT MSCT. Materials and methods Scannings with four different parameter from the composition of 1mm or 3mm and pitch of 3.5 or 5.5 were performed at a human head sample.Coronal multiplanar reformations were obtained from the volume data sets with an effective thickness of 1mm or 3mm and a gap of a 0.5mm or 1.5mm. Results High quality MPR can be obtained from four sets of volume data.The quality of MPR from images data with the effective of 1mm and the pitch of 3.5 was the highest. The ability to display tiny structure of MPR from the effective thickness of 1mm was supper to that from the effective thickness of 3mm.The influence of pitch on displaying the tiny structure was not significant. Conclusions Slice thickness is the essential factor to impact on the quality while the influence of pitch is not significant.
出处
《海南医学》
CAS
2005年第6期17-18,共2页
Hainan Medical Journal
