| ZHAO Hong-liang,SHI Ming-guo,HUAN Yi,LIU Ying,REN Jing,LI Jian,ZHENG Min-wen.Comparison of prospective sequence acquisition mode and Flash mode for DSCT angiographic diagnosis of congenital heart disease[J].Chinese Journal of Radiological Medicine and Protection,2013,33(5):555-558 |
| Comparison of prospective sequence acquisition mode and Flash mode for DSCT angiographic diagnosis of congenital heart disease |
| Received:December 07, 2012 |
| DOI：10.3760/cma.j.issn.0254-5098.2013.05.028 |
| KeyWords:Congenital heart disease Tomography Image quality Radiation dose |
| FundProject: |
| Author Name | Affiliation | E-mail | | ZHAO Hong-liang | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | SHI Ming-guo | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | HUAN Yi | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | LIU Ying | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | REN Jing | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | LI Jian | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | | | ZHENG Min-wen | Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China | zhengmw2007@163.com |
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| 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 \5cm(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%)(χ2=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. |
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