Iterative reconstruction in cardiac CT

Naoum, Christopher; Blanke, Philipp; Leipsic, Jonathon

doi:10.1016/j.jcct.2015.04.004

Cited by 46 publications

(26 citation statements)

References 62 publications

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“…Each vendor has a proprietary IR method that shows promise of minimizing the relationship between image noise and radiation dose. Generally, in this technique, FBP is utilized to obtain the initial reconstructed image, which is used as a starting point for IR . The FBP is blended with IR at different levels in order to optimize the reconstruction technique.…”

Section: Introductionmentioning

confidence: 99%

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Radiation dose and diagnostic image quality associated with iterative reconstruction in coronary CT angiography: A systematic review

et al. 2016

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The aim of this systematic review is to evaluate the radiation dose reduction achieved using iterative reconstruction (IR) compared to filtered back projection (FBP) in coronary CT angiography (CCTA) and assess the impact on diagnostic image quality. A systematic search of seven electronic databases was performed to identify all studies using a developed keywords strategy. A total of 14 studies met the criteria and were included in a review analysis. The results showed that there was a significant reduction in radiation dose when using IR compared to FBP (P < 0.05). The mean and standard deviation (SD) difference of CTDIvol and dose-length-product (DLP) were 14.70 ± 6.87 mGy and 186 ± 120 mGy.cm respectively. The mean ± SD difference of effective dose (ED ) was 2.9 ± 1.7 mSv with the range from 1.0 to 5.0 mSv. The assessment of diagnostic image quality showed no significant difference (P > 0.05). The mean ± SD difference of image noise, signal-noise ratio (SNR) and contrast-noise ratio (CNR) were 1.05 ± 1.29 HU, 0.88 ± 0.56 and 0.63 ± 1.83 respectively. The mean ± SD percentages of overall image quality scores were 71.79 ± 12.29% (FBP) and 67.31 ± 22.96% (IR). The mean ± SD percentages of coronary segment analysis were 95.43 ± 2.57% (FBP) and 97.19 ± 2.62% (IR). In conclusion, this review analysis shows that CCTA with the use of IR leads to a significant reduction in radiation dose as compared to the use of FBP. Diagnostic image quality of IR at reduced dose (30-41%) is comparable to FBP at standard dose in the diagnosis of CAD.

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Section: Introductionmentioning

confidence: 99%

“…Generally, in this technique, FBP is utilized to obtain the initial reconstructed image, which is used as a starting point for IR. 14 The FBP is blended with IR at different levels in order to optimize the reconstruction technique. Consequently, the technique will have less computational burden and faster speed.…”

Section: Introductionmentioning

confidence: 99%

Radiation dose and diagnostic image quality associated with iterative reconstruction in coronary CT angiography: A systematic review

et al. 2016

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“…Current IR algorithms typically combine statistical modeling with MBIR. 73 Multiple studies have evaluated the impact of IR techniques on image quality and radiation dose for different clinical indications in both adults and pediatric patients including CCTA (Table 3). [13][14][15]74,75 A recent metaanalysis reported that the IR techniques can lower radiation dose by up to 48% in comparison with the traditional FBP method for CCTA.…”

Section: Iterative Reconstructionsmentioning

confidence: 99%

Recent advances in cardiac computed tomography dose reduction strategies: a review of scientific evidence and technical developments

et al. 2017

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Abstract. Cardiac imagers worldwide are bracing for increased utilization of cardiac computed tomography (CT) in clinical practice. This expanding opportunity brings along a responsibility to produce diagnostic quality images with optimized radiation dose. The following review aims to address the dose reduction strategies in cardiac CT in light of recent scientific evidence and technical developments.

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“…To overcome this impediment, several types of iterative reconstruction (IR) methods have been developed and validated for different clinical indications. [6][7][8][9][10] With adaptive statistical iterative reconstruction (ASiR; GE Healthcare, Waukesha, WI USA) preserved signal-to-noise ratio (SNR) and study interpretability was demonstrated despite a 44% radiation dose reduction. 11 On the downside, higher levels of ASiR have been reported to cause image quality issues, such as an increasing "plastic" appearance.…”

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confidence: 99%