CAJ | 학술논문

目的：对比各向同性三维快速自旋回波（3 dimensional fast spin echo,3D-FSE）和三维快速场回波（3 dimensional fast field echo,3D-FFE）及二维快速自旋回波（2 dimensional fast spin echo,2D-FSE）对踝关节解剖结构显示的特点。方法随机选10名志愿者进行各向同性3D-FSE、3D-FFE及2D-FSE序列磁共振扫描以及三维重建，并测量各组织的信噪比（signal-to-noise ratio, SNR）、对比信噪比（contrast-to-noise ratio, CNR），用5分利克特表（5-point Likert scale）评估各序列各组织的成像质量。结果在各组织中的3D-FSE序列SNR最高，在软骨、肌肉、肌腱中其次为3D-FFE序列；软骨-骨髓、肌肉-肌腱、关节液-肌腱中的3D-FSE的CNR最高，其次为3D-FFE，各序列间具有统计学差异（P<0.05）。主观评估三种序列踝关节软骨的成像质量，各序列间有统计学差异（P<0.05），3D-FFE成像质量最好，其次为3D-FSE。主观评估韧带中3D-FSE、2D-FSE序列均优于3D-FFE序列（P<0.05）；主观评估肌腱中，除腓短肌腱外，其余肌腱都有统计学差异（P<0.05），且都是3D-FSE成像质量最好，其次为2D-FSE序列。结论各向同性3D-FSE序列具有最高的SNR、CNR，能任意平面重建，扫描时间短，可全面评估复杂关节的解剖结构，广泛应用临床。
목적：대비각향동성삼유쾌속자선회파（3 dimensional fast spin echo,3D-FSE）화삼유쾌속장회파（3 dimensional fast field echo,3D-FFE）급이유쾌속자선회파（2 dimensional fast spin echo,2D-FSE）대과관절해부결구현시적특점。방법수궤선10명지원자진행각향동성3D-FSE、3D-FFE급2D-FSE서렬자공진소묘이급삼유중건，병측량각조직적신조비（signal-to-noise ratio, SNR）、대비신조비（contrast-to-noise ratio, CNR），용5분리극특표（5-point Likert scale）평고각서렬각조직적성상질량。결과재각조직중적3D-FSE서렬SNR최고，재연골、기육、기건중기차위3D-FFE서렬；연골-골수、기육-기건、관절액-기건중적3D-FSE적CNR최고，기차위3D-FFE，각서렬간구유통계학차이（P<0.05）。주관평고삼충서렬과관절연골적성상질량，각서렬간유통계학차이（P<0.05），3D-FFE성상질량최호，기차위3D-FSE。주관평고인대중3D-FSE、2D-FSE서렬균우우3D-FFE서렬（P<0.05）；주관평고기건중，제비단기건외，기여기건도유통계학차이（P<0.05），차도시3D-FSE성상질량최호，기차위2D-FSE서렬。결론각향동성3D-FSE서렬구유최고적SNR、CNR，능임의평면중건，소묘시간단，가전면평고복잡관절적해부결구，엄범응용림상。
Objective To compare the image quality of isotropic 3-dimensional fast spin echo (3D-FSE), 3D fast field echo (3D-FFE), and 2D fast spin echo (2D-FSE) sequences in magnetic resonance imaging (MRI) of the anatomical structure of the ankle joint. Methods The ankle joints of 10 healthy volunteers were examined with isotropic 3D-FSE, 3D-FFE and 2D-FSE sequences using a 1.5T MR scanner and 3D reconstruction. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the tissues were measured. Two radiologists evaluated the image quality of the 3 sequences using a 5-point Likert scale in a double-blinded manner. Results The 3D-FSE sequences resulted in the highest SNRs for all the tissues and the highest CNRs for differentiation between cartilage and marrow, between muscle and tendon, and between tendon and fluid. In the estimation of image quality for cartilages, 3D-FFE had the highest score followed by 3D-FSE, and the latter had the highest score among the 3 sequences in displaying the tendon. Conclusion 3D-FSE sequence has a high performance in displaying the anatomical structures of complex joints especially for cartilage, ligament, and tendon tissues.