Dooms G C, Hricak H, Margulis A R, de Geer G
Radiology. 1986 Jan;158(1):51-4. doi: 10.1148/radiology.158.1.3940397.
Fat has been used in many studies on magnetic resonance (MR) imaging as the tissue of reference in comparing regional signal intensities from various tissues using different imaging parameters. This is a retrospective study of 78 patients selected to assess the influence of different factors such as age, gender, obesity, and weight loss on the T1 and T2 relaxation parameters of fat in different areas of the body. The T1 values of fat were not influenced by the factors studied or by anatomic location of the fat. The T2 values were significantly lower in patients older than 65 years and in patients with significant weight loss caused by carcinoma or chronic disease. Nevertheless, these variations were small, with considerable overlap of the mean and rather large standard deviation values. In conclusion, fat is a valuable reference tissue for MR studies and is relatively uninfluenced by the factors studied.
在许多磁共振（MR）成像研究中，脂肪被用作参考组织，以使用不同成像参数比较各种组织的局部信号强度。这是一项回顾性研究，选取了78名患者，旨在评估年龄、性别、肥胖和体重减轻等不同因素对身体不同部位脂肪的T1和T2弛豫参数的影响。脂肪的T1值不受所研究因素或脂肪解剖位置的影响。65岁以上患者以及因癌症或慢性病导致体重显著减轻的患者的T2值显著较低。然而，这些变化很小，平均值有相当大的重叠，标准差数值也相当大。总之，脂肪是MR研究中有价值的参考组织，相对不受所研究因素的影响。
