Multiphase CT Angiography versus Single-Phase CT Angiography: Comparison of Image Quality and Radiation Dose

Yang, Chin‐Yi; Chen, Ya-Fang; Lee, Chung-Wei; Huang, Adam; Shen, Yun; Wei, Chao; Liu, Hon‐Man

doi:10.3174/ajnr.a1073

Cited by 60 publications

(33 citation statements)

References 16 publications

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“…Techniques to increase spatial coverage included table toggle techniques, 25 CTP repeated at 2 consecutive levels, 26 and the use of 320-section scanners with inherent greater spatial coverage. 27,28 Our study has a small sample size, reflecting the difficulty in recruiting patients with ICH into hyperacute-phase imaging studies. Validation of our findings in a larger prospective sample is thus required.…”

Section: Discussionmentioning

confidence: 99%

CT Perfusion Spot Sign Improves Sensitivity for Prediction of Outcome Compared with CTA and Postcontrast CT

Koculym

Huynh

Jakubovic

et al. 2012

AJNR Am J Neuroradiol

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Section: Discussionmentioning

confidence: 99%

CT Perfusion Spot Sign Improves Sensitivity for Prediction of Outcome Compared with CTA and Postcontrast CT

Koculym

Huynh

Jakubovic

et al. 2012

AJNR Am J Neuroradiol

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“…22 Several studies reported inferior or comparable image quality of 4D-CTA and conventional CTA. 13,14,19 TI-CTA, on the other hand, was shown to have a 43% higher contrast-to-noise ratio and a 28% lower image noise compared with conventional CTA. 16 In addition, TI-CTA was rated as having less vascular noise, better vascular contour, better detail visibility of medium arteries, better detail visibility of small arteries, and better overall image quality than conventional CTA and 4D-CTA.…”

Section: 21mentioning

confidence: 99%

“…Even if each of these acquisitions uses a lower dose than conventional CTA, the cumulative dose of 4D-CTA is usually substantially higher than that in conventional CTA. 13,14 Reducing the dose of individual acquisitions further will lead to excessive image noise. This needs to be counterbalanced by image filtering or iterative reconstruction.…”

Section: Imaging Techniquementioning

confidence: 99%

4D-CTA in Neurovascular Disease: A Review

Kortman

Smit

Oei

et al. 2014

AJNR Am J Neuroradiol

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SUMMARY:CT angiography is a widely used technique for the noninvasive evaluation of neurovascular pathology. Because CTA is a snapshot of arterial contrast enhancement, information on flow dynamics is limited. Dynamic CTA techniques, also referred to as 4D-CTA, have become available for clinical practice in recent years. This article provides a description of 4D-CTA techniques and a review of the available literature on the application of 4D-CTA for the evaluation of intracranial vascular malformations and hemorrhagic and ischemic stroke. Most of the research performed to date consists of observational cohort studies or descriptive case series. These studies show that intracranial vascular malformations can be adequately depicted and classified by 4D-CTA, with DSA as the reference standard. In ischemic stroke, 4D-CTA better estimates thrombus burden and the presence of collateral vessels than conventional CTA. In intracranial hemorrhage, 4D-CTA improves the detection of the "spot" sign, which represents active ongoing bleeding.ABBREVIATIONS: dAVF ϭ dural arteriovenous fistula; TI-CTA ϭ timing-invariant CTA

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“…Children are in growth and development stages and are more sensitive to radioactive rays than adults, so radiation doses should be reduced during CT examination [2]. International and domestic academics have done a series of researches and assessments [3], however, there is few research about the clinical effect and application value of using low-dose multi-slice CT scanning in children chest examination. This study aimed to study the clinical effect and application value of using low-dose multi-slice CT scanning in children chest examination combined reduction of kV and mA value, hoping to provide a safer, less invasive and more reliable way to perform clinical examination.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Low-dose Multi-slice CT Scanning in Children Chest Examination

Li¹,

Tang²,

Sun³

2016

Proceedings of the 2016 International Conference on Education, Management and Computer Science

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Abstract. Objective: To evaluate the application effect and value of low-dose kV and mA for chest examination in children by multi-slice CT.Methods: 120 children underwent chest CT were enrolled and divided into six groups according to different kV and mA values. Average CT dose index (CTDIvol, mGy) and dose length product (DLP, mGy*cm) in each group were recorded. Effective dose (ED, mSV) was calculated by DLP, ED= k×DLP [k value =0.039]. Image quality analysis was independently conducted by two experienced doctors. Radiation dose and image quality were compared among six groups. Peripheral blood cells of each child were respectively detected before and after test (2 hours, 1 day, 1 week and 4 weeks).Results: Radiation doses in each group (CTDIvol, DLP and ED) were decreased to the control group, in which the combined reduction group dropped approximately 50%. There was no significant difference in image quality among each group and all meet the diagnostic requirements. No significant change was observed in peripheral blood cell counts of children before and after test.Conclusions: Low-dose multi-slice CT scanning for chest examination combined reduction of kV and mA value may effectively reduce hazards of radiation to children, with the image quality meeting the diagnostic requirements.

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Multiphase CT Angiography versus Single-Phase CT Angiography: Comparison of Image Quality and Radiation Dose

Cited by 60 publications

References 16 publications

CT Perfusion Spot Sign Improves Sensitivity for Prediction of Outcome Compared with CTA and Postcontrast CT

CT Perfusion Spot Sign Improves Sensitivity for Prediction of Outcome Compared with CTA and Postcontrast CT

4D-CTA in Neurovascular Disease: A Review

Evaluation of Low-dose Multi-slice CT Scanning in Children Chest Examination

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