Hybrid Iterative Reconstruction Algorithm Improves Image Quality in Craniocervical CT Angiography

Löve, Áskell; Siemund, Roger; Höglund, Peter; Ramgren, Birgitta; Undrén, Per; Björkman–Burtscher, Isabella M.

doi:10.2214/ajr.13.10701

Cited by 12 publications

(7 citation statements)

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“…11.35 ± 0.83), we found that a 55% reduction in the radiation dose and lower CT attenuation of vessels can be achieved by using 100 kVp and 225 mAs, Askell Love et al also stated that lower attenuation and radiation dose can be achieved using lower kVp and mAs [18]. When combined with HIR algorithm, the improved imaging of head and neck arteries were sufficient for clinical diagnosis.…”

Section: Discussionmentioning

confidence: 51%

Hybrid Iterative Reconstruction Algorithm Improves Image Quality and Helps to Decrease Radiation Dose in 256-Slides Craniocervical CTA

Sharma¹

2014

OMICS J Radiol

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Section: Discussionmentioning

confidence: 51%

Hybrid Iterative Reconstruction Algorithm Improves Image Quality and Helps to Decrease Radiation Dose in 256-Slides Craniocervical CTA

Sharma¹

2014

OMICS J Radiol

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“…This indicates that factors other than image quality influence diagnostic accuracy, e.g. localization and size of aneurysm, early filling of adjacent veins, and different image assessment biases (15,26).…”

Section: Discussionmentioning

confidence: 99%

CT angiography in non-traumatic subarachnoid hemorrhage: the importance of arterial attenuation for the detection of intracranial aneurysms

et al. 2015

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“…These hybrid iterative reconstruction (HIR) algorithms offer better image quality and have been used as clinical routine reconstruction methods. [ 4 – 6 ]…”

Section: Introductionmentioning

confidence: 99%

Knowledge-based iterative model reconstruction

Wang

Zhu²,

et al. 2018

Medicine

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The aim of this study was to compare image quality of low tube voltage cerebral computed tomography angiography (CTA) reconstructed with knowledge-based iterative model reconstruction (IMR), filtered back projection (FBP), and hybrid iterative reconstruction (HIR).A total of 101 patients with suspected cerebrovascular diseases were enrolled and randomized into 2 groups, 100 kVp tube voltage (n = 53) and reduced tube voltage (80 kVp) (n = 48). Computed tomography data were reconstructed with IMR, FBP, and HIR algorithms. The image noise, vascular attenuation, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were measured and calculated. Two blinded radiologists independently evaluated image quality based on diagnostic confidence on a 3-point scale. Quantitative and qualitative assessments were compared between different groups and reconstruction subgroups.Vascular attenuation was higher in the reduced tube voltage group than in 100-kVp tube voltage group, but showed no significant difference within each group. In both groups, the image noise, vascular SNR, and CNR were significantly improved by IMR as compared with FBP and HIR. Inter-group comparison indicated that IMR with reduced tube voltage showed better image quality with lower image noise and higher vascular SNR and CNR than FBP and HIR at 100 kVp, but slightly inferior to IMR at 100 kVp. IMR also yields the best qualitative image quality, and improves the diagnostic confidence of atherosclerosis and aneurysm. Compared with the standard 120-kVp protocol (1.86mSv), the radiation doses of 100 kVp (1.13mSv) and 80 kVp (0.56mSv) were 39% and 70% less, respectively.The quantitative and qualitative image quality obtained by IMR was superior to that obtained by FBP and HIR for low tube voltage cerebral CTA.

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Hybrid Iterative Reconstruction Algorithm Improves Image Quality in Craniocervical CT Angiography

Abstract: The iterative reconstruction algorithm significantly improves image quality in craniocervical CT, especially at the thoracic inlet. Despite careful study design, considerable interobserver and intraobserver variability was noted.

Cited by 12 publications

References 21 publications

Hybrid Iterative Reconstruction Algorithm Improves Image Quality and Helps to Decrease Radiation Dose in 256-Slides Craniocervical CTA

Hybrid Iterative Reconstruction Algorithm Improves Image Quality and Helps to Decrease Radiation Dose in 256-Slides Craniocervical CTA

CT angiography in non-traumatic subarachnoid hemorrhage: the importance of arterial attenuation for the detection of intracranial aneurysms

Knowledge-based iterative model reconstruction

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