Effects of reconstruction technique on the quality of abdominal CT angiography: A comparison between forward projected model-based iterative reconstruction solution (FIRST) and conventional reconstruction methods

医学 氡变换 迭代重建 图像质量 放射科 威尔科克森符号秩检验 计算机断层血管造影 血管造影 核医学 图像噪声 腹主动脉 人工智能 曼惠特尼U检验 外科 主动脉 图像(数学) 计算机科学 内科学
作者
Rongli Wu,Masatoshi Hori,Hiromitsu Onishi,Atsushi Nakamoto,Hiroki Fukui,Takashi Ota,Takeshi Nishida,Yukihiro Enchi,Kazuhiko Satoh,Noriyuki Tomiyama
出处
期刊:European Journal of Radiology [Elsevier BV]
卷期号:106: 100-105 被引量:16
标识
DOI:10.1016/j.ejrad.2018.07.015
摘要

This study aimed to compare the quality of abdominal CT angiography (CTA) images obtained using conventional reconstruction algorithms with those obtained using a novel iterative algorithm (forward projected model-based iterative reconstruction solution, FIRST) for evaluating arteries in the abdomen.Abdominal CTA images from 60 patients (M:F = 27:33; mean age, 62.4 ± 16.7 years) were reconstructed using three algorithms - filtered back projection (FBP), adaptive iterative dose reduction 3D (AIDR 3D), and FIRST. Image noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) in the abdominal aorta, celiac trunk, superior mesenteric, renal, and right hepatic arteries were objectively evaluated via region-of-interest analysis and compared using the one-way analysis of variance test. Two radiologists independently scored and selected the best (score 3), second best (score 2), and the worst (score 1) images based on the visual image quality of peripheral arteries. Wilcoxon signed rank test was used for comparing image quality scores.FIRST and AIDR 3D significantly reduced image noise compared with FBP (P < 0.001). SNR and CNR were significantly higher with AIDR 3D and FIRST than with FBP reconstruction (P < 0.001), with FIRST displaying the highest CNR (14.31 ± 4.17) for the right hepatic artery than the other two methods (P < 0.05). Both radiologists scored FIRST images as having the best image quality among the three methods for peripheral abdominal artery evaluation (3.0 ± 0.0, P < 0.001).FIRST reconstruction yielded superior abdominal CTA images as compared with FBP or AIDR 3D reconstruction.
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