Evaluation of pulse sequences used for magnetic resonance sialography.
Evaluation of pulse sequences used for magnetic resonance sialography.
复制标题
用于磁共振唾液造影的脉冲序列的评估。
DOI：
10.1038/sj/dmfr/4600632
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
N. Shoji
中科院分区：
文献类型：
--
作者：
Maya Sakamoto;T. Sasano;S. Higano;S. Takahashi;Tatsuo Nagasaka;I. Yanagawa;Y. Hosogai;H. Tamura;M. Iikubo;N. Shoji
目标
确定MR涎腺造影显示腮腺小导管的最佳序列。
方法
采用快速自旋回波（TSE）、单激发快速自旋回波（SSTSE）、半傅立叶采集、单激发快速自旋回波（HASTE）和快速梯度自旋回波（TGSE）序列对聚乙烯管中的蒸馏水体模进行MR成像，并进行视觉和定量比较。使用相同的四个序列获得来自健康志愿者和干燥综合征（SS）患者的MR涎腺造影片。
结果
在体模中，TSE图像最好，对比度噪声比（CNR）最高。在志愿者中，主要导管在TSE和SSTSE中特别清晰地可视化;然而，大多数次级和/或三级腮腺导管未被任何使用的序列描绘。在SS患者中，小主导管和小假性囊肿的图像使用TSE更清晰。但TSE不能显示狭窄的主导管或周围导管或非常小的假性囊肿。
结论
TSE被认为是最适合评估小腮腺导管的MR序列。然而，需要进一步改进，因为它并不总是充分显示它们。
OBJECTIVES
To determine the most appropriate sequences for the visualization of small parotid ducts in MR sialography.
METHODS
MR images of a phantom consisting of distilled water in polyethylene tubes were obtained with turbo-spin echo (TSE), single-shot turbo-spin echo (SSTSE), half-fourier acquisition, single-shot turbo-spin echo (HASTE) and turbo gradient-spin echo (TGSE) pulse sequences and compared visually and quantitatively. MR sialograms obtained from healthy volunteers and patients with Sjögren's syndrome (SS) were obtained using the same four sequences.
RESULTS
In the phantom, TSE images were best and the contrast-noise ratio (CNR) highest. In the volunteers, the main ducts were especially clearly visualized with TSE and in SSTSE; however, the majority of secondary and/or tertiary parotid ducts were not depicted by any of the sequences used. In SS patients, images of small main ducts and small pseudocysts were clearer using TSE. However, TSE could not depict the narrow main ducts or peripheral ducts or very small pseudocysts.
CONCLUSIONS
TSE is considered the most suitable MR sequence for assessing small parotid gland ducts. However, further improvement is needed since it does not always visualize them sufficiently.