A Preliminary Study of the Cardiac Magnetic Resonance Multi-low-b
DWI Technology
LIU Ming-xi1,ZHANG Wan-shi1,ZHANG Zi-heng2,MENG Li-min1,GONG Wan-feng1, LIU Jie1,FANG Hong1, WANG Ping1
1.Department of CT and MRI, AirForce
General Hospital, Beijing 100142,
China; 2.General Electric Medical
Beijing Magnetic Resonance Center,
Beijing 100176, China
Abstract：Objective To investigate the imaging technology and characteristics of cardiac magnetic
resonance (CMR) multi-low-b DWI technology. Methods With a 3.0T magnetic resonance imaging (MRI)
system, cardiovascular magnetic imaging, including MR Cine, T2WI and multi-low-b DWI technology,
was performed in 30 healthy volunteers who had given written informed consent to investigate the
clinical feasibility of multi-low-b DWI technology and to explore whether ADC values in different
segmental myocardium, different blood supply areas, different age-groups and gender were similar or not.
A discussion was made on which b value should be selected to better reflect the perfusion of myocardium
when using DWI technology to scan cardiac structure. Results The image quality of multi-low-b DWI
technology was better when the b values were 20, 60 s/mm2 (b<100 s/mm2). The study showed ADC
values of some myocardial segments in healthy volunteers were different (F=6.315，P<0.001). ADC
values of different blood supply areas were different (F=27.804，P＜0.001) as below: the ADC value of
the left anterior descending branch was (0.01186±0.00422) mm2/s; the ADC value of the right coronary
artery was (0.01032±0.00333) mm2/s; the ADC value of the left circumflex was (0.00902±0.00248) mm2/s.
Besides, myocardial ADC values were not different from base to apex. Conclusion The CMR multilow-
b DWI technology is feasible and repeatable. Myocardial ADC values have regional variation. The
image quality is better when the b values are 20, 60 s/mm2 (b<100 s/mm2) which indicates the images
obtained through DWI technology can better reflect myocardial perfusion. The research provides relevant
reference for choosing the appropriate b values in the future studies.
刘明熙1，张挽时1，张子衡2，孟利民1，龚万沣1，刘洁1，方红1，王萍1. 多个低b值DWI技术在心脏成像中的初
步研究[J]. 中国医疗设备, 2016, 31(3): 42-47.
LIU Ming-xi1,ZHANG Wan-shi1,ZHANG Zi-heng2,MENG Li-min1,GONG Wan-feng1, LIU Jie1,FANG Hong1, WANG Ping1. A Preliminary Study of the Cardiac Magnetic Resonance Multi-low-b
DWI Technology. China Medical Devices, 2016, 31(3): 42-47.
