Noise-based tube current reduction method with iterative reconstruction for reduction of radiation exposure in coronary CT angiography

Shen, Junlin; Du, Xin; Guo, Daode; Cao, Lei; Gao, Yan; Bai, Mei; Li, Pengyu; Liu, Jiabin; Li, Kuncheng

doi:10.1016/j.ejrad.2012.10.008

Cited by 18 publications

(18 citation statements)

References 18 publications

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“…Body mass index (BMI)-adaptive reconstructions using predefined acquisition settings based on patient body habitus offer a potential solution (92,98), while other groups have proposed patient-specific adaptivedose procedures that adjust scan settings on the basis of allowable image noise (70,101). In this regard, Yin et al (102) recently demonstrated that in a population with a broad range of BMI values, the use of IR after applying a 50% tube current reduction for every selected kilovoltage preserves image quality and diagnostic accuracy at coronary CT angiography compared with standard FBP.…”

Section: Cardiac Imagingmentioning

confidence: 99%

State of the Art: Iterative CT Reconstruction Techniques

Geyer¹,

Schoepf²,

Meinel³

et al. 2015

Radiology

591

364

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Owing to recent advances in computing power, iterative reconstruction (IR) algorithms have become a clinically viable option in computed tomographic (CT) imaging. Substantial evidence is accumulating about the advantages of IR algorithms over established analytical methods, such as filtered back projection. IR improves image quality through cyclic image processing. Although all available solutions share the common mechanism of artifact reduction and/or potential for radiation dose savings, chiefly due to image noise suppression, the magnitude of these effects depends on the specific IR algorithm. In the first section of this contribution, the technical bases of IR are briefly reviewed and the currently available algorithms released by the major CT manufacturers are described. In the second part, the current status of their clinical implementation is surveyed. Regardless of the applied IR algorithm, the available evidence attests to the substantial potential of IR algorithms for overcoming traditional limitations in CT imaging.

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Section: Cardiac Imagingmentioning

confidence: 99%

State of the Art: Iterative CT Reconstruction Techniques

Geyer¹,

Schoepf²,

Meinel³

et al. 2015

Radiology

591

364

View full text Add to dashboard Cite

show abstract

“…In recent years, several approaches have been taken to optimize radiation dose in CCTA such as prospective ECG‐gating, tube current modulation, low tube voltage and high pitch acquisition . A newer approach that has recently become commercially available from CT vendors is to optimize the CT image reconstruction.…”

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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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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“…Awareness and concern regarding the high burden of radiation dose to the population stemming from CT began in the late 1980s, following a survey by the UK National Radiological Protection Board (NRPB) 7 . The NRPB found that CT comprised only 2% of all medical imaging examinations but contributed 20% of the collective population dose from diagnostic imaging 7–9 . The NRPB also found radiation doses from CT were trending in a direction at odds with the decreasing collective patient doses received from conventional x‐ray examinations 7 .…”

mentioning

confidence: 99%

The disproportionate risk burden of CT scanning on females and younger adults in Australia: a retrospective cohort study

Gibson

Moorin

Semmens

et al. 2014

Australian and New Zealand Journal of Public Health

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Objectives: To explore the interaction of computed tomography (CT) use, dose and radiation risk of Australian Medicare-funded CT scanning and the impact on cancer incidence and mortality.Methods: This retrospective cohort study used records of Medicare subsidised CT scans in Australia (2006Australia ( /07 to 2011 and Australian CT dosimetry. The annual number, rate and adjusted likelihood of CT were determined for gender, age and examination type. Incident cancer and cancer-related mortality attributable to CT in Australia were estimated using lifetime attributable risk coefficients, dosimetry and scan numbers. Results:The number of CT scans increased by 36% from 2006/07 to 2011/12. Only patients aged 0-4 years did not present an increase in CT scanning rates. Females were 11% more likely to be scanned than males. Head, abdomen/pelvis and spine CT scans were the most likely areas scanned. Females were attributed 61% of both incident cancers and cancer-related mortality from 55% of scans performed. Patients aged 15-44 years were attributed 37% of incident cancers and 30% of cancer-related mortality from 26% of CT scans. Conclusions:CT in Australia is increasing, including in groups at higher risk from ionising radiation. This presents a complex set of risk/benefit considerations for clinicians and policy makers.

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Noise-based tube current reduction method with iterative reconstruction for reduction of radiation exposure in coronary CT angiography

Cited by 18 publications

References 18 publications

State of the Art: Iterative CT Reconstruction Techniques

State of the Art: Iterative CT Reconstruction Techniques

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

The disproportionate risk burden of CT scanning on females and younger adults in Australia: a retrospective cohort study

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