应用iSTIC技术评价正常胎儿右心室容积与收缩功能

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Abstract Objective: To investigate the value of intelligent spatiotemporal image correlation(iSTIC) in researching normal fetal right heart ventricular volume and systolic function. Methods: From October 2014 to September 2015 in our prenatal ultrasound examinations of normal pregnancy, 167 cases of pregnant women were included. The application of iSTIC technology was to acquire the whole fetal cardiac volume data and the QLAB software was for off-line analysis. We defined cardiac systolic and diastolic phase by atrioventricular valve open and following atrioventricular value closure. Two phases of volumetric data were measured by manual tracting and summation of multiple slices, recording the right ventricular end-systolic volume(RESV) and the right ventricular end-diastolic volume(REDV). These volumes were used to calculate the right stroke volume(RSV), the right cardiac output(RCO) and the right ejection fraction(REF). Analysis of the relationship between the above-mentioned index changing with the gestational age(GA). In 30 randomly selected cases the right ventricular volume were measured by the same sonographer twice and the intraobserver agreement measurements were calculated. Results: Among 167 cases of fetal, 140 cases of application of iSTIC technology acquisition images clarity for later analysis, the successful rate was 83.8%.The mean REDV increased from (0.99±0.34) at 22 weeks to (3.70±0.35) at 35 weeks+6; the mean RESV increased from (0.43±0.18) at 22 weeks to (1.37±0.21) at 35 weeks+6; the mean RSV increased from (0.62±0.29) at 22 weeks to (2.32±0.19) at 35 weeks+6; the mean RCO increased from (92.23±40.67) at 22 weeks to (337.21±29.02) at 35 weeks+6. REDV, RESV, RSV, RCO were increased with the gestational age, there are linear correlation with gestational age(P<0.001). REF had no obvious correlation with GA(P>0.05). Conclusion: Application of iSTIC technology can quantitatively measure the fetal right ventricular volume, relatively simple operation, and high repeatability. iSTIC technology is expected to provide a new method for clinical evaluation of the fetal cardiac function.

Key words： Ventricular function, right Fetus Ultrasonography, prenatal

Received: 14 March 2016

PACS:	Ｒ714.51
	Ｒ445.1

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	SUN Ting-ting
	SUN Jia-xing
	XIE Li-mei
	WANG Bing
	WANG Chao

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SUN Ting-ting,SUN Jia-xing,XIE Li-mei, et al. Evaluation of intelligent spatiotemporal image correlation on normal fetal#br# right ventricular volume and systolic function[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2016, 27(11): 807-811.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2016/V27/I11/807

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