The feasibility of Forward-projected model-based Iterative Reconstruction SoluTion (FIRST) for coronary 320-row computed tomography angiography: A pilot study

Abstract Background We aimed to assess and compare the influence of Forward projected model-based Iterative Reconstruction SoluTion (FIRST), a recently introduced full iterative reconstruction method, on radiation doses and image quality with that of Adaptive Iterative Dose Reduction (AIDR) 3D for 3...

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Bibliographic Details
Published in:Journal of cardiovascular computed tomography 2017-01, Vol.11 (1), p.40-45
Main Authors: Maeda, Eriko, Tomizawa, Nobuo, Kanno, Shigeaki, Yasaka, Koichiro, Kubo, Takatoshi, Ino, Kenji, Torigoe, Rumiko, Ohtomo, Kuni
Format: Article
Language:English
Subjects:
320-row CT
Aged
Cardiovascular
Computed Tomography Angiography - methods
Coronary Angiography - methods
Coronary CT angiography
Coronary Vessels - diagnostic imaging
Female
Humans
Image quality
Iterative reconstruction
Male
Middle Aged
Multidetector Computed Tomography - methods
Pilot Projects
Predictive Value of Tests
Radiation Dosage
Radiation dose
Radiation Exposure
Radiographic Image Interpretation, Computer-Assisted - methods
Reproducibility of Results
Retrospective Studies
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Summary:Abstract Background We aimed to assess and compare the influence of Forward projected model-based Iterative Reconstruction SoluTion (FIRST), a recently introduced full iterative reconstruction method, on radiation doses and image quality with that of Adaptive Iterative Dose Reduction (AIDR) 3D for 320-row cardiac computed tomography (CT). Methods A total of 184 patients subjected to single-beat reconstruction cardiac CT were retrospectively included. The first 89 patients received standard radiation doses; their data were reconstructed using AIDR 3D, whereas the last 95 patients received in average 20% reduction in tube current; their data were reconstructed using FIRST. Subjective image quality (blooming, image sharpness, image noise, and overall subjective image quality) were graded using 3-, 5-, 4-, and 4-point scales (0–2, 1–5, 1–4, and 1–4), respectively; for all items, the highest score indicated excellent image quality. Image noise and signal-to-noise ratios at proximal segments were analyzed as objective measures of image quality. Results FIRST reconstruction allowed 28% dose reduction compared with AIDR 3D (1.88 vs. 2.61 mSv, p = 0.012) and yielded better subjective image quality in terms of blooming, image sharpness, image noise, and overall image quality (1.10 vs. 1.01, p = 0.0007; 3.02 vs. 2.74, p 
ISSN:1934-5925
1876-861X
DOI:10.1016/j.jcct.2016.11.002