Comparison of prospective sequence acquisition mode and Flash mode for DSCT angiographic diagnosis of congenital heart disease
10.3760/cma.j.issn.0254-5098.2013.05.028
- VernacularTitle:先心病双源CT血管造影前瞻性序列扫描与大螺距扫描的对照研究
- Author:
Hongliang ZHAO
;
Mingguo SHI
;
Yi HUAN
;
Ying LIU
;
Jing REN
;
Jian LI
;
Minwen ZHENG
- Publication Type:Journal Article
- Keywords:
Congenital heart disease;
Tomography;
Image quality;
Radiation dose
- From:
Chinese Journal of Radiological Medicine and Protection
2013;33(5):555-558
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare radiation dose and image quality of prospectively ECG-triggered sequence acquisition mode and Flash(high-pitch spiral acquisition)mode in DSCT angiography of children with congenital heart disease.Methods Sixty children with clinically suspected congenital heart disease and undertook DSCT prospectively ECG-triggered scan were enrolled in the study and randomly divided into two groups.The Flash mode and prospective sequence scanning mode were applied in group A and B,respectively.The CT dose index(CTDIvol),dose length product(DLP),effective dose(E),and image quality were compared between two groups.Refered to surgery or cardiac angiography(DSA),the diagnostic coincidence rates were compared between two groups.Results The CTDIvol in group A and B was(0.32 ± 0.10)and(1.40 ± 0.43)mGy(t=13.32,P＜0.05),respectively.The DLP was(6.46 ±1.92)and(17.91 ±4.80)mGy·cm(t=7.97,P＜0.05).E was(0.19±0.05)and(0.45±0.12)mSv (t=16.64,P＜0.05).The image quality score in group A(4.03 ± 1.15)was higher than that in group B (3.13 ± 1.38)(t=3.55,P＜0.05).The total diagnostic coincidence rates were 100％(A)and 93％ (B).But the deformity diagnostic coincidence rates in group A(91％)was higher than that in group B (75％)(x2=7.72,P＜0.05).Conclusions In DSCT diagnosis of congenital heart disease in children,using flash scan mode can reveal more cardiac deformities than using prospective sequence scanning mode,and could reduce the radiation dose.
