The application value of self-developed high-resolution pelvic-specific coil in 3.0 T MRI equipment
王晓 1郑福玲 1陆晓平 1李娟 1张鹏 1刘梦超 1金川 1张宏宇 1王天娇 1王沄 1薛华丹1
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作者信息
1. 中国医学科学院北京协和医学院北京协和医院放射科,北京 100032
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摘要
目的 探讨自主研发的16通道高分辨盆腔专用线圈(16C)在3.0T盆腔MRI中的应用价值.材料和方法 前瞻性招募35例行盆腔MRI的患者,分别用16C线圈和32通道的体部线圈(32C)采集相同的轴位和矢状位T2WI序列.比较相同序列图像中第三骶椎、子宫肌层、前列腺外周带、直肠壁和闭孔内肌的信噪比(signal to noise ratio,SNR)及对比噪声比(contrast to noise ratio,CNR).由两位诊断医师各自对两组图像质量和直肠轴位图像直肠壁分层结构的显示度进行主观评分.结果 两组线圈相同序列的T2WI矢状位第三骶椎、子宫肌层、前列腺外周带和轴位闭孔内肌的SNR差异具有统计学意义(P＜0.05),矢状位第三骶椎、子宫肌层和轴位直肠壁对肌肉的CNR差异具有统计学意义(P＜0.05),16C组高于32C组.两组线圈相同序列的T2WI图像质量主观评价差异具有统计学意义(P＜0.05),16C组图像质量更优.在轴位T2WI直肠壁分层结构的显示度评价方面两组图像差异具有统计学意义(P＜0.05),16C组更优.结论 16C线圈在3.0 T磁共振设备上成像质量更好,更有利于盆腔疾病的诊断.
Abstract
Objective:To explore the value of self-developed 16-channel high-resolution pelvic-specific coil(16C)in pelvic 3.0 T MRI.Methods and Materials:Thirty-five patients underwent routine pelvic MRI were prospectively included,and the same axial and sagittal T2WI sequences were acquired with a 16C coil and a 32-channel body coil(32C),respectively.Signal to noise ratio(SNR)and contrast to noise ratio(CNR)of the third sacral vertebrae,myometrium,peripheral band of prostate,rectal wall,and internal obturator muscle were compared between images of the same sequences acquired with the two coils.Qualitative image quality and rectal wall depiction were evaluated by two radiologists for both groups.Results:Compared with 32C,SNR of third sacral vertebrae,myometrium,peripheral band of the prostate on T2WI sagittal images,SNR of intraocclusal muscle on T2WI axial images,CNR of third sacral vertebrae,myometrium on T2WI sagittal images and CNR of rectal wall on T2WI axial images were all higher,and all difference were statistically significant(P＜0.05).Rectal wall depiction on T2WI axial images and all qualitative image quality were better in 16C group than that of 32C group(P＜0.05).Conclusions:Compared with conventional 32C coils,images acquired with 16C coils have better imaging quality and diagnostic confidence.
关键词
磁共振成像/线圈/信噪比/对比噪声比/图像质量
Key words
magnetic resonance imaging/coil/signal to noise ratio/contrast to noise ratio/image quality
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