| Yan Huifeng,Zhang Li,Zhang Zhaotao,Yao Bin,Liu Ying,Zuo Minjing,Li Xiao,Huang Shuiping.Dual-source CT with high-pitch, low tube voltage and iterative reconstruction in preoperative evaluation of transcatheter aortic valve replacement[J].Chinese Journal of Radiological Medicine and Protection,2017,37(2):149-154 |
| Dual-source CT with high-pitch, low tube voltage and iterative reconstruction in preoperative evaluation of transcatheter aortic valve replacement |
| Received:October 11, 2016 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.02.012 |
| KeyWords:Dual-source CT High pitch Low tube voltage Iterative reconstruction Transcatheter aortic valve replacement (TAVR) |
| FundProject: |
| Author Name | Affiliation | E-mail | | Yan Huifeng | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Zhang Li | Department of Neurology, The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Zhang Zhaotao | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Yao Bin | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Liu Ying | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Zuo Minjing | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | 124542022@qq.com | | Li Xiao | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | | | Huang Shuiping | Department of CT The Second Affiliated Hospital of Nanchang University, 330006 Nanchang, China | |
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| Abstract:: |
| Objective To investigate the value of Dual-source CT with low tube voltage(kV), high-pitch, and iterative reconstruction in preoperative evaluation of transcatheter aortic valve replacement(TAVR).Methods Sixty patients with suspected aortic stenosis who underwent thoraco-abdominal CT angiography (CTA) were divided into three groups (n=20) using a table of random numbers method (simple high-pitch group, combined high-pitch, low-kV and iterative reconstruction group and conventional group). Subjective and objective scores of image quality, contrast dosage and radiation dose of three groups were compared. Results The subjective scores of image quality were seen in only three cases in conventional group which met preoperative assessment of TAVR, and were significantly higher in high-pitch group and combined group than those in conventional group(t=17.083,16.667,P<0.05) with no statistically significant difference(P>0.05) between high-pitch group and combined group. There was no statistical significance among three groups about the objective evaluation of image quality. The dosage contrast medium in high-pitch group and combined group were significantly less than that in conventional group (t=-13.645,-14.647,P<0.05), but there was not statistically difference (P>0.05) between high-pitch group and combined group. The volume CT dose index(CTDIvol), dose length product (DLP) and the effective dose(E) values of combined group were significantly lower than those in high-pitch group and conventional group, and there were statistically different among three groups(F=2 564.398,651.616,653.308,P<0.05). Conclusions The Dual-source CT with low tube voltage, high-pitch and iterative reconstruction could meet the requirement of image quality for preoperative assessment of TAVR, and greatly reduce the dose of radiation and contrast medium. |
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