Objective To investigate the clinical value of different magnetic resonance (MR) pulse sequences in diagnosis of spinal metastatic tumor. Methods Fifteen patients with clinically suspected spinal metastatic tumor were...Objective To investigate the clinical value of different magnetic resonance (MR) pulse sequences in diagnosis of spinal metastatic tumor. Methods Fifteen patients with clinically suspected spinal metastatic tumor were included in this study. These patients were with documented primary tumors. Four MR pulse sequences, T1-weighted spin echo (T1WI SE), T2-weighted fast spin echo (T2WI FSE), short time inversion recovery (STIR), and gradient echo 2-D multi echo data imaging combination (GE Me-2D) were used to detect spinal metastasis. Results Fifteen vertebral bodies were entire involvement, 38 vertebral bodies were section involvement, and totally 53 vertebral bodies were involved. There were 19 focal infections in pedicle of vertebral arch, 15 metastases in spinous process and transverse process. Fifty-three vertebral bodies were abnormal in T1WI SE and GE Me-2D, 35 vertebral bodies were found abnormal in T2WI FSE, and 50 vertebral bodies were found abnormal in STIR. The verges of focal signal of involved vertebral bodies were comparatively clear in T1WI SE, comparatively clear or vague in T2WI FSE, vague in STIR, and clear in GE Me-2D.Conclusions GE Me-2D may be the most sensitive technique to detect metastases. So three sequences (T1WI SE, T2WI FSE, GE Me-2D) can demonstrate the early changes of spinal metastasis roundly.展开更多
目的探讨三维梯度自旋回波(GRASE)序列在老年患者磁共振胆胰管成像(MRCP)中的应用价值。方法纳入MRCP检查的老年患者63例。同时采集屏气2D-FSE、屏气3D-GRASE和呼吸触发3D-FSE序列。计算图像的信噪比、对比噪声比和对比度,并对图像质量...目的探讨三维梯度自旋回波(GRASE)序列在老年患者磁共振胆胰管成像(MRCP)中的应用价值。方法纳入MRCP检查的老年患者63例。同时采集屏气2D-FSE、屏气3D-GRASE和呼吸触发3D-FSE序列。计算图像的信噪比、对比噪声比和对比度,并对图像质量进行主观评价,包括伪影、背景抑制、总体图像质量和胆胰管各分支的显示情况。组间比较采用单因素ANOVA检验或非参数Kruskal-Wallis检验。结果GRASE序列的伪影评分高于2D-FSE序列,差异具有统计学意义(4.24±0.69 vs 3.76±1.03,P<0.05),但与3D-FSE序列之间差异无统计学意义(P>0.05)。GRASE序列背景抑制的评分高于2D-FSE序列(P<0.05)。在图像的总体质量评分中,GRASE序列略高于3D-FSE序列,差异无统计学意义(4.29±0.83 vs 4.16±0.79,P>0.05),两者均高于2D序列,差异均有统计学意义(P<0.05)。GRASE序列的CNR、CR与3D-FSE序列相近,差异无统计学意义(P>0.05),均高于2D-FSE序列,差异均有统计学意义(P均<0.05)。GRASE序列在胆总管、肝总管、右肝管后支、左肝管内、外支的显示的显示能力与3D-FSE序列无差别。GRASE序列在右肝管前支的显示能力不如3D-FSE序列(P<0.05)。结论GRASE获得胆胰管的图像质量与3D-FSE序列接近,高于2D-FSE序列,为老年人疾病诊断提供影像学依据。展开更多
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1...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3DFSE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。展开更多
文摘Objective To investigate the clinical value of different magnetic resonance (MR) pulse sequences in diagnosis of spinal metastatic tumor. Methods Fifteen patients with clinically suspected spinal metastatic tumor were included in this study. These patients were with documented primary tumors. Four MR pulse sequences, T1-weighted spin echo (T1WI SE), T2-weighted fast spin echo (T2WI FSE), short time inversion recovery (STIR), and gradient echo 2-D multi echo data imaging combination (GE Me-2D) were used to detect spinal metastasis. Results Fifteen vertebral bodies were entire involvement, 38 vertebral bodies were section involvement, and totally 53 vertebral bodies were involved. There were 19 focal infections in pedicle of vertebral arch, 15 metastases in spinous process and transverse process. Fifty-three vertebral bodies were abnormal in T1WI SE and GE Me-2D, 35 vertebral bodies were found abnormal in T2WI FSE, and 50 vertebral bodies were found abnormal in STIR. The verges of focal signal of involved vertebral bodies were comparatively clear in T1WI SE, comparatively clear or vague in T2WI FSE, vague in STIR, and clear in GE Me-2D.Conclusions GE Me-2D may be the most sensitive technique to detect metastases. So three sequences (T1WI SE, T2WI FSE, GE Me-2D) can demonstrate the early changes of spinal metastasis roundly.
文摘目的探讨三维梯度自旋回波(GRASE)序列在老年患者磁共振胆胰管成像(MRCP)中的应用价值。方法纳入MRCP检查的老年患者63例。同时采集屏气2D-FSE、屏气3D-GRASE和呼吸触发3D-FSE序列。计算图像的信噪比、对比噪声比和对比度,并对图像质量进行主观评价,包括伪影、背景抑制、总体图像质量和胆胰管各分支的显示情况。组间比较采用单因素ANOVA检验或非参数Kruskal-Wallis检验。结果GRASE序列的伪影评分高于2D-FSE序列,差异具有统计学意义(4.24±0.69 vs 3.76±1.03,P<0.05),但与3D-FSE序列之间差异无统计学意义(P>0.05)。GRASE序列背景抑制的评分高于2D-FSE序列(P<0.05)。在图像的总体质量评分中,GRASE序列略高于3D-FSE序列,差异无统计学意义(4.29±0.83 vs 4.16±0.79,P>0.05),两者均高于2D序列,差异均有统计学意义(P<0.05)。GRASE序列的CNR、CR与3D-FSE序列相近,差异无统计学意义(P>0.05),均高于2D-FSE序列,差异均有统计学意义(P均<0.05)。GRASE序列在胆总管、肝总管、右肝管后支、左肝管内、外支的显示的显示能力与3D-FSE序列无差别。GRASE序列在右肝管前支的显示能力不如3D-FSE序列(P<0.05)。结论GRASE获得胆胰管的图像质量与3D-FSE序列接近,高于2D-FSE序列,为老年人疾病诊断提供影像学依据。
文摘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3DFSE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。
