Kim S, Lee G H, Lee S, Park S H, Pyo H B, Cho J S
Telecommunication Basic Research Laboratory, Electronics and Telecommunication Research Institute, P.O. Box 106, Yusong-gu, Taejon 305-600, Korea.
Biomed Sci Instrum. 1999;35:303-8.
In this paper, we suggest an automatic fat region setting method in computed tomography to measure body fat. Quantitative measurement of body fat is important for the diagnosis and treatment of diseases related to obesity. The evaluation methods of obesity such as weight and height ratio, waiste and hip circumference ratio, and subcutaneous fat thickness by clipper, have a weak point that they do not measure body fat quantitatively. To overcome the weak point a body fat measurement method by computed tomography has been tried recently. The body fat measurement by computed tomography presents volume of body fat quantitatively at a specific region such as subcutaneous and abdominal fats. Computed tomography provides an image consisting of voxels with Hounsfield unit which is proportional to the density at the voxels. In general, the Hounsfield units of the body fat is known as it has the values from -150 to -50. However, the Hounsfield unit range of the fat is different for every person and every region of a person. In this paper, we show the difference of the body fat range in the Hounsfield units for 20 persons and various regions of a person, and we suggest an automatic setting method of the body fat region in the Hounsfield units due to the Gaussian function fitting of the histogram in the computed tomography image.
在本文中，我们提出了一种在计算机断层扫描中自动设置脂肪区域的方法来测量体脂。体脂的定量测量对于与肥胖相关疾病的诊断和治疗很重要。诸如体重与身高比、腰围与臀围比以及用卡钳测量皮下脂肪厚度等肥胖评估方法存在一个弱点，即它们不能定量测量体脂。为了克服这一弱点，最近人们尝试了通过计算机断层扫描进行体脂测量的方法。通过计算机断层扫描进行体脂测量可以在皮下和腹部脂肪等特定区域定量呈现体脂体积。计算机断层扫描提供由具有亨氏单位的体素组成的图像，该单位与体素处的密度成正比。一般来说，体脂的亨氏单位已知其值在 -150 到 -50 之间。然而，脂肪的亨氏单位范围因人而异且同一个人的不同区域也不同。在本文中，我们展示了20个人以及一个人不同区域的体脂范围在亨氏单位上的差异，并基于计算机断层扫描图像中直方图的高斯函数拟合提出了一种在亨氏单位中自动设置体脂区域的方法。
