Mihara F, Gupta K L
Department of Radiology, Tulane University Medical Center, New Orleans, Louisiana.
Invest Radiol. 1991 Aug;26(8):734-41. doi: 10.1097/00004424-199108000-00007.
To suppress both water and fat signal while retaining the high signal of Gd-DTPA enhancement, magnetic resonance imaging (MRI) of phantoms and 28 patients with mass lesions was done using short repetition time (TR) and short inversion time inversion recovery (STIR) sequences. Optimal STIR pulse sequences of 500 to 1000/80-100/20-30 (TR/TI/TE) were determined by an experimental study. In most instances, a signal bandwidth of +/- 8 kHz was used to increase the signal-to-noise ratio. The authors measured image contrast between lesions and adjacent fatty tissue and compared postcontrast STIR and T1-weighted spin-echo (T1-W SE) images. When the signal intensity of a lesion is 80% of adjacent fatty tissue on postcontrast T1-W SE, short TR STIR images provide better tumor delineation.
为了在保留钆喷酸葡胺（Gd-DTPA）增强后的高信号的同时抑制水和脂肪信号，使用短重复时间（TR）和短反转时间反转恢复（STIR）序列对模型以及28例有肿块病变的患者进行了磁共振成像（MRI）检查。通过实验研究确定了500至1000/80 - 100/20 - 30（TR/TI/TE）的最佳STIR脉冲序列。在大多数情况下，使用±8 kHz的信号带宽来提高信噪比。作者测量了病变与相邻脂肪组织之间的图像对比度，并比较了增强后STIR图像和T1加权自旋回波（T1-W SE）图像。当增强后T1-W SE上病变的信号强度为相邻脂肪组织的80%时，短TR STIR图像能更好地勾勒出肿瘤轮廓。
