期刊
JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY
卷 42, 期 2, 页码 184-190出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/RCT.0000000000000666
关键词
iterative reconstruction; ASIR; MBIR; CT image quality; abdomen
资金
- National Institute of Health/National Cancer Institute [P30CA016672]
Objective The purpose of this study was to compare abdominopelvic computed tomography images reconstructed with adaptive statistical iterative reconstruction-V (ASIR-V) with model-based iterative reconstruction (Veo 3.0), ASIR, and filtered back projection (FBP). Methods and Materials Abdominopelvic computed tomography scans for 36 patients (26 males and 10 females) were reconstructed using FBP, ASIR (80%), Veo 3.0, and ASIR-V (30%, 60%, 90%). Mean SD patient age was 32 10 years with mean +/- SD body mass index of 26.9 +/- 4.4 kg/m(2). Images were reviewed by 2 independent readers in a blinded, randomized fashion. Hounsfield unit, noise, and contrast-to-noise ratio (CNR) values were calculated for each reconstruction algorithm for further comparison. Phantom evaluation of low-contrast detectability (LCD) and high-contrast resolution was performed. Results Adaptive statistical iterative reconstruction-V 30%, ASIR-V 60%, and ASIR 80% were generally superior qualitatively compared with ASIR-V 90%, Veo 3.0, and FBP (P < 0.05). Adaptive statistical iterative reconstruction-V 90% showed superior LCD and had the highest CNR in the liver, aorta, and, pancreas, measuring 7.32 +/- 3.22, 11.60 +/- 4.25, and 4.60 +/- 2.31, respectively, compared with the next best series of ASIR-V 60% with respective CNR values of 5.54 +/- 2.39, 8.78 +/- 3.15, and 3.49 +/- 1.77 (P <0.0001). Veo 3.0 and ASIR 80% had the best and worst spatial resolution, respectively. Conclusions Adaptive statistical iterative reconstruction-V 30% and ASIR-V 60% provided the best combination of qualitative and quantitative performance. Adaptive statistical iterative reconstruction 80% was equivalent qualitatively, but demonstrated inferior spatial resolution and LCD.
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