Ultra-low-dose multiphase CT angiography derived from CT perfusion data in patients with middle cerebral artery stenosis

Wu, Xiaoling; Yang, Yuelong; Wen, Menghuang; Wang, Limin; Yang, Yishi; Zhang, Yuhu; Mo, Zihua; Nie, Kun; Huang, Biao

doi:10.1007/s00234-019-02313-x

Cited by 4 publications

(4 citation statements)

References 31 publications

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“…This model can provide as many image parameters as possible while reducing radiation dose, without affecting image quality. 7 The collateral circulation score predicted a clinical favorable outcome after 90 days with a threshold of >3 points in our study. In previous studies of salvageable brain tissue in AIS patients, there has been controversy about the threshold for collateral scoring that could benefit from endovascular treatment.…”

Section: Discussionsupporting

confidence: 46%

“…In recent years, some researchers applied an iterative model reconstruction algorithm to low-dose mCT, which could reduce image noise. This model can provide as many image parameters as possible while reducing radiation dose, without affecting image quality 7 …”

Section: Discussionmentioning

confidence: 99%

“…In the ESCAPE (Endovascular Treatment for Small Core and Anterior Circulation Proximal Occlusion with Emphasis on Minimizing CT to Recanalization Times) 1 trial, the pial arterial filling score based on mCTA was used to screen enrolled patients. Multiphase CTA is fast and safe and has the advantage of temporal resolution in the evaluation of collateral circulation 6,7 . The present study aimed to assess the efficacy of mCTA in imaging the collateral circulation in AIS patients before mechanical thrombectomy.…”

mentioning

confidence: 99%

“…Multiphase CTA is fast and safe and has the advantage of temporal resolution in the evaluation of collateral circulation. 6,7 The present study aimed to assess the efficacy of mCTA in imaging the collateral circulation in AIS patients before mechanical thrombectomy. We analyzed the baseline data of 58 AIS patients who were treated by thrombectomy and used the 90-day modified Rankin Scale (mRS) score as the criteria for midterm neurological function recovery.…”

mentioning

confidence: 99%

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Risk and Benefit Evaluation: Application of Multiphase Computed Tomography Angiography in Mechanical Thrombectomy for Patients With Acute Ischemic Stroke

Yu¹,

Pan²,

Zhao³

et al. 2021

J Comput Assist Tomogr

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Objective:The objective of this study was to evaluate the collateral circulation in patients with acute ischemic stroke (AIS) by multiphase computed tomography angiography (mCTA) and explore its application value in the risk and benefit assessment after thrombectomy.Methods: Clinical and imaging parameters of AIS patients who underwent thrombectomy were consecutively collected. The 90-day modified Rankin Scale (mRS) score was used as the standard for evaluating the recovery of neurological functions. The receiver operating characteristic curve and correlation analysis were used to evaluate the diagnostic efficacy of collateral circulation in the clinical outcomes at 90 days and the correlation with symptomatic intracerebral hemorrhage (sICH), respectively.Results: Thirty of 58 AIS patients (51.7%) had favorable functional recovery (90-day mRS score, ≤2). Significant differences were observed in age, time from symptom onset to groin puncture, National Institutes of Health Stroke Scale score at admission and 24 hours after thrombectomy, mRS score at discharge, collateral circulation score, and target mismatch between the favorable and unfavorable groups (P < 0.05). The diagnostic efficacy of mCTA collateral score (area under the curve, 0.697; 95% confidence interval, 0.563-0.831) was similar to that of computed tomography perfusion target mismatch (area under the curve, 0.740; 95% confidence interval, 0.609-0.872) (DeLong test, P = 0.575). The collateral circulation score was significantly negatively correlated with sICH (ρ = −0.607, P < 0.001). Patients with sICH had lower collateral circulation scores and higher 90-day mRS scores (P < 0.05). Conclusions:The mCTA collateral score has good application value in the risk and benefit evaluation after mechanical thrombectomy, and it is well suited for routine emergency assessment of AIS patients.

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Section: Discussionsupporting

confidence: 46%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Risk and Benefit Evaluation: Application of Multiphase Computed Tomography Angiography in Mechanical Thrombectomy for Patients With Acute Ischemic Stroke

Yu¹,

Pan²,

Zhao³

et al. 2021

J Comput Assist Tomogr

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CT-Perfusion-basierte CTA-Aufnahmen zur Darstellung der Kollateralzirkulation

2021

Radiologie up2date

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Comparison of image quality and radiation dose using different pre-ASiR-V and post-ASiR-V levels in coronary computed tomography angiography

Zhao

Liu

et al. 2021

XST

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OBJECTIVE: To determine the optimal pre-adaptive and post-adaptive level statistical iterative reconstruction V (ASiR-V) for improving image quality and reducing radiation dose in coronary computed tomography angiography (CCTA). METHODS: The study was divided into two parts. In part I, 150 patients for CCTA were prospectively enrolled and randomly divided into 5 groups (A, B, C, D, and E) with progressive scanning from 40% to 80% pre-ASiR-V with 10% intervals and reconstructing with 70% post-ASiR-V. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Subjective image quality was assessed using a 5-point scale. The CT dose index volume (CTDIvol) and dose-length product (DLP) of each patient were recorded and the effective radiation dose (ED) was calculated after statistical analysis by optimizing for the best pre-ASiR-V value with the lowest radiation dose while maintaining overall image quality. In part II, the images were reconstructed with the recommended optimal pre-ASiR-V values in part I (D group) and 40%–90% of post-ASiR-V. The reconstruction group (D group) was divided into 6 subgroups (interval 10%, D0:40% post-ASiR-V, D1:50% post - ASiR-V, D2:60% post-ASiR-V, D3:70% post-ASiR-V, D4:80% post-ASiR-V, and D5:90% post-ASiR-V).The SNR and CNR of D0-D5 subgroups were calculated and analyzed using one-way analysis of variance, and the consistency of the subjective scores used the k test. RESULTS: There was no significant difference in the SNRs, CNRs, and image quality scores among A, B, C, and D groups (P > 0.05). The SNR, CNR, and image quality scores of the E group were lower than those of the A, B, C, and D groups (P < 0.05). The mean EDs in the B, C, and D groups were reduced by 7.01%, 13.37%, and 18.87%, respectively, when compared with that of the A group. The SNR and CNR of the D4–D5 subgroups were higher than the D0-D3 subgroups, and the image quality scores of the D4 subgroups were higher than the other subgroups (P < 0.05). CONCLUSION: The wide-detector combined with 70% pre-ASiR-V and 80% post-ASiR-V significantly reduces the radiation dose of CCTA while maintaining overall image quality as compared with the manufacture’s recommendation of 40% pre-ASiR-V.

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Ultra-low-dose multiphase CT angiography derived from CT perfusion data in patients with middle cerebral artery stenosis

Cited by 4 publications

References 31 publications

Risk and Benefit Evaluation: Application of Multiphase Computed Tomography Angiography in Mechanical Thrombectomy for Patients With Acute Ischemic Stroke

Risk and Benefit Evaluation: Application of Multiphase Computed Tomography Angiography in Mechanical Thrombectomy for Patients With Acute Ischemic Stroke

CT-Perfusion-basierte CTA-Aufnahmen zur Darstellung der Kollateralzirkulation

Comparison of image quality and radiation dose using different pre-ASiR-V and post-ASiR-V levels in coronary computed tomography angiography

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