胸部多排螺旋计算机断层扫描中肺气肿的计算机辅助测量：图像重建参数的影响

Computer-aided measurements of pulmonary emphysema in chest multidetector-row spiral computed tomography: effect of image reconstruction parameters.

作者信息

Behrendt Florian F, Das Marco, Mahnken Andreas H, Kraus Thomas, Bakai Annemarie, Stanzel Sven, Günther Rolf W, Wildberger Joachim E

机构信息

Department of Diagnostic Radiology, University Hospital, RWTH-Aachen University, Aachen, Germany.

出版信息

J Comput Assist Tomogr. 2008 Nov-Dec;32(6):899-904. doi: 10.1097/RCT.0b013e31815ade64.

DOI:10.1097/RCT.0b013e31815ade64

PMID:19204452

Abstract

OBJECTIVE

To evaluate the effect of different image reconstruction parameters on quantitative automated measurements of pulmonary emphysema in chest multidetector-row spiral computed tomography.

MATERIALS AND METHODS

Thirty patients with known emphysema underwent multidetector-row spiral computed tomography. Retrospective reconstruction with a soft tissue kernel (Siemens B20 at 1-mm, 2-mm, and 3-mm slices) and 4 alternative kernel grades (from smooth to sharp: Siemens B30, B40, B50, B60 at 1-mm slices) was performed. Total lung volume, emphysema volume (EV), 15th percentile density, and 4 EV clusters were quantified. Results were compared with those of standard algorithm B20/1-mm slices.

RESULTS

Differences in total lung volume were less than 0.2%. Alternative kernel grades resulted in a significantly increased average EV. The 15th percentile density showed a significant average difference for all alternative algorithms. The large emphysema cluster showed a significant change for reconstruction algorithms B50, B60, B20/2 mm and B20/3 mm.

CONCLUSIONS

Pulmonary EV is significantly affected by different reconstruction algorithms.

摘要

目的

评估胸部多排螺旋计算机断层扫描中不同图像重建参数对肺气肿定量自动测量的影响。

材料与方法

30例已知肺气肿患者接受多排螺旋计算机断层扫描。使用软组织内核（西门子B20，层厚1毫米、2毫米和3毫米）和4种不同的内核等级（从平滑到锐利：西门子B30、B40、B50、B60，层厚1毫米）进行回顾性重建。对全肺容积、肺气肿容积（EV）、第15百分位数密度和4个EV簇进行定量分析。将结果与标准算法B20/1毫米层厚的结果进行比较。