摘要
目的:初步探讨显示肺结节累及支气管的理想CT层厚。方法:54例肺结节(直径≤3 cm)患者,经屏气训练后,采用64层螺旋CT行胸部扫描(准直器宽度0.625 mmx64)。分别重组成1、2、5 mm等3组图像,比较3组图像对受累支气管显示的异同。以1 mm图像显示的支气管改变为标准,判断2 mm、5 mm组图像显示支气管改变的可靠性。结果:1 mm图像显示54例62个肺结节共累及支气管85支,其中累及2～4级支气管35支,5～8级支气管50支。2 mm图像上显示受累2～4级支气管改变与1 mm图像上显示受累2～4级支气管改变一致的有34支,两者数量无显著差异(P=0.836>0.05)。5 mm图像上显示受累2～4级支气管改变与1 mm图像上显示受累2～4级支气管改变一致的有24支,两者数量有显著差异(P=0.026<0.05)。2 mm图像上显示受累5～8级支气管改变与1 mm图像上显示受累5～8级支气管改变一致的有38支,两者数量有显著差异(P=0.029<0.05)。5 mm图像上显示受累5～8级支气管改变与1 mm图像上显示受累5～8级支气管改变一致的有31支,两者数量有显著差异(P=0.001<0.05)。结论:孤立性肺结节累及支气管在2～4级时2 mm层厚较合适,累及支气管在5～8级时1 mm较合适。
ObjectiTe To determine an optimal slice thickness that can efficiently reveal the bronchial imageology of pulmonary nodules（PNs） on multi -slice spiral computed tomography（MSCT） images preliminarily.Methods Fifty-four patients with 62 PNs（diameter≤3 cm） underwent multi-detector-row computed tomography of the chest in a single-breath-hold technique.The raw data were acquired with a collimation of 0.625 mm.Three sets of contiguous images were reconstructed with 1,2,and 5 mm slice thickness,respectively.Bronchial imageology of SPNs on the CT images presented in 1,2,and 5 mm slice thickness was compared.Using the 1 mm sections as the gold standard,an optimal slice thickness in revealing bronchial imageology of SPNs was determined.Results Bronchial imageology of SPNs on the CT images presented in 1mm slice thickness involved 85 bronchi（35 second-fourth generation bronchi;50 fifth-eighth generation bronchi）.Bronchial imageology on 2 mm thick sections was as same as that on 1 mm thick sections in 34 second-fourth generation bronchi.No statistically significant difference in the number of second—fourth generation bronchi with same bronchial imageology was found between that on 2 mm thick images and 1 mm thick images（P=0.836 0.05）.Bronchial imageology on 5 mm thick sections was as same as that on 1 mm thick sections in 24 second-fourth generation bronchi. There was statistically significant difference in number of second-fourth generation bronchi with same bronchial imageology between that on 5 mm thick images and 1 mm thick images（P=0.0260.05）.Bronchial imageology on 2 mm thick sections was as same as that on 1 mm thick sections in 38 fifth eighth generation bronchi.There was statistically significant difference in number of fifth-eighth generation bronchi with same bronchial imageology between that on 2 mm thick images and 1 mm thick images（P=0.0290.05）.Bronchial imageology on 5 mm-thick images was as same as that on 1 mm thick images in 31 fifth-eighth generation bronchi.There was statistically significant difference in number of fifth-eighth generation bronchi with same bronchial imageology between that on 5 mm thick sections and 1 mm thick sections（P=0.0010.05）.Conclusion It is suggested that the use of 2 mm slice thickness is suitable in revealing second-fourth generation bronchi and the use of 1 mm slice thickness is suitable in revealing fifth-eighth generation bronchi.
出处
《医疗卫生装备》
CAS
2012年第3期56-59,共4页
Chinese Medical Equipment Journal
