The influence factors on CT value of carotid atherosclerotic plaque in contrast enhanced qrterial phase
YE Huichuang1, KE Wenting2, FAN Hengxin2, CHEN Zhenjing3, FAN Shufeng4
1.Department of Radiology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027; 2.Department of Radiology, the Affiliated Taizhou Hospital of Wenzhou Medical University, Taizhou, 317000; 3.Department of Radiology, Ningbo Medical Center Lihuili Hospital, Ningbo, 315000; 4.Department of Radiology, the Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310000
YE Huichuang,KE Wenting,FAN Hengxin, et al. The influence factors on CT value of carotid atherosclerotic plaque in contrast enhanced qrterial phase[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2018, 48(3): 194-196,201.
Abstract：Objective: To investigate the influence factors and measuring CT value of carotid atherosclerotic plaques in the contrast enhanced arterial phase. Methods: Forty successive clinical diagnostic cases of unilateral or bilateral carotid atherosclerotic plaques (the maximum thickness >2 mm) confirmed by CTA and clinical data were randomly collected. The region of interest on the maximum level of the plaque without calcification and obvious artifacts was measured, the difference (∆Hu) of the CT value after plain scan and enhanced scan on the same level was calculated and the influence factors were investigated. Results: Of 61 carotid atherosclerotic plaques enrolled from the 40 cases, the CT value of CTA-phase in 26 plaques (42.6%) rose >10 Hu, 8 plaques (13.1%) declined >10 Hu, while the rest 27 plaques (44.3%) between the rise and decline. The median, maximum and minimum CT values of ∆Hu were 4.8 (-4.4, 19.3) Hu, 49.6 Hu, -55.3 Hu respectively. Conclusion: The concentration of the contrast medium in the arterial phase could affect the CT value of CAS plaque.
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