Imaging Technology
Feasibility study of the multi-slice dual-source CT double turbo flash mode for one-step coronary and carotid-cerebrovascular CT angiography in patients with heart rate variability
Bao Yunfeng, Huang Xiaoying, Li Zhifei, Guo Fangkai, Zhao Mingjuan, Wang Kaihong, Cao Shenjie, Chen Yingmin
Published 2020-02-10
Cite as Chin J Radiol, 2020,54(02): 95-100. DOI: 10.3760/cma.j.issn.1005-1201.2020.02.002
Abstract
ObjectiveTo investigate the feasibility of one-step coronary and carotid-cerebrovascular computed tomography angiography (CTA) using high-pitch Double Turbo Flash mode and to analyze the image quality and radiation dose in patients with heart rate variability using multi-slice detector dual-source CT.
MethodsA total of 79 patients with heart rate variability higher than 3 beat/min (bpm) were retrospectively analyzed. They were grouped by the scanning methods. Group A (n=40) were performed double turbo flash mode for one-step coronary and carotid-cerebrovascular arteriesinjected with one injection of contrast agent.further divided into Single A (only the phase 1 image)and Double A(combined images of phases 1 and 2). Group B (n=39) were performed separately with twice injection of contrast agent. Subjective scoring was performed on the image quality of the group Single A, Double A and B using a 4-point. Then the objective parameters of image quality, CT attenuations, image noise, signal-to-noise (SNR), and contrast-to-noise (CNR), were evaluated. Then subjective scores, objective evaluation indicators, and radiation dose were compared with one-way ANOVA analysis among the three groups.Contrast agent were compared by using t test in group A and B.
ResultsNo significant difference was found (F=2.093, P=0.128) for the subjective scores of the head and neck CTA among the three groups with (3.47±0.51), (3.53±0.51), (3.69±0.47). Significant difference was found (F=50.955, P<0.01) for the subjective scores of coronary CTA among the three groups with (2.70±0.76), (3.35±0.66), (3.58±0.50), and there was no statistically significant difference between Double A and B groups (P=0.104), met the requirements for diagnosis. The objective evaluation of the three groups compared the head and neck CTA images were statistically significant (P<0.05), of which the difference between the Single A and the Double A was not statistically significant (P>0.05), met the requirements for diagnosis; the differences in SNR and CNR of coronary CTA images are statistically significant (F=12.991, 12.236, P<0.01), and there was no statistically significant difference between Double A and B (P>0.05), met the requirements for diagnosis. Radiation dose in the group Double A was lower than group B (decreased by 46.15%,P<0.01).The amount of the contrast agent in the group Double A was lower than group B (decreased by 44.13%, t=-45.455;P<0.01).
ConclusionThe double turbo flash mode is feasibility for one-step coronary and carotid-cerebrovascular CTA in patients with the heart rate variability using multi-slice dual-source CT.This scan mode can maintain the diagnostic image quality with low contrast agent and radiation dose.
Key words:
Tomography, X-ray computed; Coronary vessels; Cerebrovascular circulation; Image quality; Radiation dosage; Heart rate
Contributor Information
Bao Yunfeng
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Huang Xiaoying
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Li Zhifei
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Guo Fangkai
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Zhao Mingjuan
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Wang Kaihong
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Cao Shenjie
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China
Chen Yingmin
Department of Medical Imaging,Hebei General Hospital,Shijiazhuang 050000,China