MR-IMAGING OF HEAD AND NECK TUMORS - COMPARISON OF T1-WEIGHTED CONTRAST-ENHANCED FAT-SUPPRESSED IMAGES WITH CONVENTIONAL T2-WEIGHTED AND FAST SPIN-ECHO T2-WEIGHTED IMAGES
MR-IMAGING OF HEAD AND NECK TUMORS - COMPARISON OF T1-WEIGHTED CONTRAST-ENHANCED FAT-SUPPRESSED IMAGES WITH CONVENTIONAL T2-WEIGHTED AND FAST SPIN-ECHO T2-WEIGHTED IMAGES
复制标题
DOI：
10.2214/ajr.163.1.8010208
复制
发表时间：
1994-07-01
影响因子：
5
通讯作者：
ENZMANN, DR
中科院分区：
文献类型：
--
作者：
ROSS, MR;SCHOMER, DF;ENZMANN, DR
目标。本研究的目的是确定三种MR脉冲序列对头颈部肿瘤和异常淋巴结检出的价值。这是通过量化一组头颈部肿瘤患者的增强脂肪抑制MR图像、常规自旋回波T2加权图像和快速自旋回波脂肪抑制TS加权图像上肿瘤、淋巴结和相应邻近组织的对比度差异来实现的。对两组头颈部肿瘤患者进行了研究。在第一组(16例)中，对比增强脂肪抑制T1加权像和常规自旋回波TP加权像。在第二组(21例)中，对比增强脂肪抑制T1加权像和快速自旋回波脂肪抑制T2加权像。结果脂肪抑制T1加权像对原发灶和淋巴结的对比度噪声比均显著高于常规或快速自旋回波T2加权像(p均小于或等于0.02)。然而，三种成像序列(对比度增强脂肪抑制T1加权序列、快速自旋回波脂肪抑制脂肪抑制序列和常规T2加权序列)对对比度噪声比的主观评价在肿瘤检测中都是令人满意的。结论：我们的结果显示脂肪抑制对比度增强T1加权图像对头颈部肿瘤和异常淋巴结提供了最高的对比度噪声比。然而，头部和颈部肿瘤包括广泛的肿瘤，分布在一个复杂的解剖区域。因此，在一些患者中，对比增强脂肪抑制T1和T2加权图像的组合，最好是快速自旋回波脂肪抑制图像，对于检测这些肿瘤和结节转移是有用的。
OBJECTIVE. The purpose of this study was to determine the Value of three MR pulse sequences for the detection of tumors and abnormal lymph nodes in the head and neck. This was accomplished by quantifying differences in contrast between tumor, lymph node, and respective adjacent tissue on contrast-enhanced fat-suppressed T1-weighted MR images, conventional spin-echo T2-weighted images, and fast spin-echo fat-suppressed TS-weighted images in a group of patients with head and neck tumors.SUBJECTS AND METHODS. Two groups of patients with head and neck tumors were studied. In the first group (16 patients), contrast-enhanced fat-suppressed T1-weighted images were compared with conventional spin-echo TP-weighted images. In the second group (21 patients), contrast-enhanced fat-suppressed T1-weighted images were compared with fast spin-echo fat-suppressed T2-weighted images. The detectability of tumor and abnormal lymph nodes was measured by calculating the contrast-to-noise ratio.RESULTS. The fat-suppressed T1-weighted images had significantly higher (p less than or equal to .02) contrast-to-noise ratios for both the primary tumor and lymph nodes than either conventional or fast spin-echo T2-weighted images did. However, subjective evaluation of the contrast-to-noise ratios proved satisfactory for tumor detection with all three imaging sequences (contrast-enhanced fat-suppressed T1-weighted, fast spin-echo fat-suppressed TP-weighted, and conventional T2-weighted).CONCLUSION. Our results show that fat-suppressed contrast-enhanced T1-weighted images provide the highest contrast-to-noise ratio for head and neck tumors and abnormal lymph nodes. However, head and neck tumors encompass a broad range of neoplasms that are distributed in a complicated anatomic area. Therefore, in some patients, a combination of contrast-enhanced fat-suppressed T1- and T2-weighted images, preferably fast spin-echo fat-suppressed images, is useful for detection of these tumors and nodal metastases.