Effect of Ultra High-Resolution Computed Tomography and Model-Based Iterative Reconstruction on Detectability of Simulated Submillimeter Artery

被引：11

作者：

Morisaka, Hiroyuki ^{[1
]}

Shimizu, Yuta ^{[2
]}

Adachi, Takuya ^{[2
]}

Fukushima, Keita ^{[2
]}

Arai, Takahiro ^{[2
]}

Yamamura, Wataru ^{[2
]}

Koyanagi, Masamichi ^{[2
]}

Kariyasu, Toshiya ^{[2
]}

Machida, Haruhiko ^{[2
]}

Sano, Katsuhiro ^{[1
]}

Yokoyama, Kenichi ^{[2
]}

Ichikawa, Tomoaki ^{[1
]}

机构：

[1] Saitama Med Univ, Int Med Ctr, Diagnost Radiol, Yamane 1397-1, Saitama 3501298, Japan

[2] Kyorin Univ, Fac Med & Hosp, Dept Radiol, Tokyo, Japan

来源：

JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY | 2020年 / 44卷 / 01期

基金：

日本学术振兴会;

关键词：

ultra-high-resolution computed tomography; model-based iterative reconstruction; modulation transfer function; PERFORMANCE EVALUATION; CT ANGIOGRAPHY; IMAGE QUALITY;

D O I：

10.1097/RCT.0000000000000963

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

100231 [临床病理学]; 100902 [航空航天医学];

摘要：

Objective To evaluate the effect of ultra high-resolution computed tomography (UHRCT) and model-based iterative reconstruction (MBIR) on the detectability of simulated submillimeter artery. Methods A small vessel phantom ranging from 0.4 to 2.0 mm in diameter and edge phantoms of low to high attenuation values were scanned by UHRCT (super-high-resolution mode and normal-resolution-mode) and conventional CT, and data were reconstructed by MBIR and filtered back projection (FBP). Vessel detectability was assessed subjectively and the effective size at which 50% of response was achieved (ES50 [mm]) was calculated. Modulation transfer function (MTF) was calculated by an edge spread function method. Results ES50 of super high-resolution mode (0.36 mm for MBIR and 0.50 mm for FBP) was significantly smaller than those of normal-resolution mode (P < 0.01). In the MTF analysis, the MTF of MBIR improved as the edge phantom attenuation increased, whereas that of FBP was stable. Conclusions Both UHRCT and MBIR are effective for the detectability of simulated submillimeter artery.

引用

页码：32 / 36

页数：5

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