CAJ | 학술논문

目的：探讨膝关节相控阵线圈在新生儿脑部MRI检查中扫描参数优化选择。方法应用膝关节相控阵线圈对足月新生儿行脑部扫描，分别采用传统脑部扫描参数和优化后扫描参数，获取横断位T1加权、T2加权、T2 FLAIR、扩散加权成像及矢状位T1加权成像等图像，比较两组图像质量、图像信噪比和满足影像诊断率。结果用膝关节相控阵线圈顺利完成45例足月新生儿行脑部扫描，其中用传统脑部扫描参数22例，用优化后扫描参数23例，两组扫描参数所得图像信噪比经两独立样本t检验，两组比较差别无统计学意义(P＞0.05)。两组扫描参数所得图像满足影像诊断率经四格表χ2检验，两组比较差别无统计学意义(P＞0.05)；优化组扫描时间较之传统组减少1/3。结论优化组扫描参数能代替传统脑部扫描参数，优化组扫描时间及SAR值均可减少。优化组扫描参数更适合膝关节相控阵线圈新生儿脑部MRI检查。
목적：탐토슬관절상공진선권재신생인뇌부MRI검사중소묘삼수우화선택。방법응용슬관절상공진선권대족월신생인행뇌부소묘，분별채용전통뇌부소묘삼수화우화후소묘삼수，획취횡단위T1가권、T2가권、T2 FLAIR、확산가권성상급시상위T1가권성상등도상，비교량조도상질량、도상신조비화만족영상진단솔。결과용슬관절상공진선권순리완성45례족월신생인행뇌부소묘，기중용전통뇌부소묘삼수22례，용우화후소묘삼수23례，량조소묘삼수소득도상신조비경량독립양본t검험，량조비교차별무통계학의의(P＞0.05)。량조소묘삼수소득도상만족영상진단솔경사격표χ2검험，량조비교차별무통계학의의(P＞0.05)；우화조소묘시간교지전통조감소1/3。결론우화조소묘삼수능대체전통뇌부소묘삼수，우화조소묘시간급SAR치균가감소。우화조소묘삼수경괄합슬관절상공진선권신생인뇌부MRI검사。
Objective To investigate the optimization of neonatal brain MR imaging with knee phased-array coil.Methods Forty-five newborns participated in the study and were scanned with a knee phased-array coil. Imaging techniques, including T1-weighted imaging, T2-weighted imaging, T2 FLAIR imaging, and diffusion weighted imaging at the axial orientation, and T1-weighted imaging at the sagittal orientation, were respectively conducted. Twenty newborns were scanned with the conventional imaging parameters, and the other twenty-three were scanned with the optimized imaging parameters. Signal-to noise ratio (SNR) and image quality for clinical diagnosis were compared between paired scans.Results All data was successfully acquired. No statistically significant difference of SNR was observed between the conventional and the optimized imaging parameters (P-value > 0.05). In addition, a Chi-square test suggested no significant difference of image quality for clinical diagnosis between the two sets of imaging parameters (P-value > 0.05). The time scanned with the optimized imaging parameters was less than that scanned with the conventional imaging parameters. Conclusion With the advantages of halving scan time and specific absorption rate, the optimized neonatal brain MR imaging parameters were superior to the conventional ones, and were more suitable for neonatal brain MR examination with knee phased-array coil.