基于模型的迭代重建、自适应统计迭代重建和滤波反投影在亚毫西弗低剂量计算机断层扫描中检测肝转移瘤的比较

Comparison of Model-Based Iterative Reconstruction, Adaptive Statistical Iterative Reconstruction, and Filtered Back Projection for Detecting Hepatic Metastases on Submillisievert Low-Dose Computed Tomography.

作者信息

Son Jung Hee, Kim Seung Ho, Yoon Jung-Hee, Lee Yedaun, Lim Yun-Jung, Kim Seon-Jeong

机构信息

From the *Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Haeundae-gu, Busan; and †Department of Radiology, Myongji Hospital, Deogyang-gu, Goyang-si, Gyeonggi-do, South Korea.

出版信息

J Comput Assist Tomogr. 2017 Jul/Aug;41(4):644-650. doi: 10.1097/RCT.0000000000000577.

DOI:10.1097/RCT.0000000000000577

PMID:28099224

Abstract

OBJECTIVE

The aim of the study was to compare the diagnostic performance of model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP) on submillisievert low-dose computed tomography (LDCT) for detecting hepatic metastases.

METHODS

Thirty-eight patients having hepatic metastases underwent abdomen CT. Computed tomography protocol consisted of routine standard-dose portal venous phase scan (120 kVp) and 90-second delayed low-dose scan (80 kVp). The LDCT images were reconstructed with FBP, ASIR, and MBIR, respectively. Two readers recorded the number of hepatic metastases on each image set.

RESULTS

A total of 105 metastatic lesions were analyzed. For reader 1, sensitivity for detecting metastases was stationary between FBP (49%) and ASIR (52%, P = 0.0697); however, sensitivity increased in MBIR (66%, P = 0.0035). For reader 2, it was stationary for all the following sets: FBP (65%), ASIR (68%), and MBIR (67%, P > 0.05).

CONCLUSIONS

The MBIR and ASIR showed a limited sensitivity for detecting hepatic metastases in submillisievert LDCT.

摘要

目的

本研究旨在比较基于模型的迭代重建（MBIR）、自适应统计迭代重建（ASIR）和滤波反投影（FBP）在亚毫西弗低剂量计算机断层扫描（LDCT）上检测肝转移瘤的诊断性能。

方法

38例有肝转移瘤的患者接受腹部CT检查。计算机断层扫描方案包括常规标准剂量门静脉期扫描（120 kVp）和90秒延迟低剂量扫描（80 kVp）。LDCT图像分别用FBP、ASIR和MBIR重建。两名阅片者记录每个图像集上肝转移瘤的数量。

结果

共分析了105个转移病灶。对于阅片者1，检测转移瘤的敏感度在FBP（49%）和ASIR（52%，P = 0.0697）之间保持稳定；然而，MBIR的敏感度有所提高（66%，P = 0.0035）。对于阅片者2，以下所有组的敏感度均保持稳定：FBP（65%）、ASIR（68%）和MBIR（67%，P > 0.05）。