通过间接方法得出的脂肪亨氏单位参考区间。
Fat Hounsfield Unit Reference Interval Derived through an Indirect Method.
作者信息
Pop Marian, Mărușteri Marius
机构信息
ME1 Department, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540139 Tirgu Mures, Romania.
Radiology and Medical Imaging Department, Tirgu Mures Emergency Institute for Cardiovascular Diseases and Heart Transplant, 540136 Tirgu Mures, Romania.
出版信息
Diagnostics (Basel). 2023 May 30;13(11):1913. doi: 10.3390/diagnostics13111913.
BACKGROUND
In vivo Hounsfield Unit (HU) values have traditionally been determined using direct CT image measurements. These measurements are dependent on the window/level used to examine the CT image and the individual conducting the fat tissue tracing.
METHODS
Using an indirect method, a new reference interval (RI) is proposed. A total of 4000 samples of fat tissues were collected from routine abdominal CT examinations. A linear regression equation was then calculated using the linear part of the cumulative frequency plot of their average values.
RESULTS
The regression function for total abdominal fat was determined to be y = 35.376*x - 123.48, and a 95% confidence RI of -123 to -89 was computed. A significant difference of 3.82 was observed between the average fat HU values of visceral and subcutaneous areas.
CONCLUSIONS
Using statistical methods and the in vivo measurements of patient data, a series of RIs were determined for fat HU that is consistent with theoretical values.
背景
传统上，体内亨氏单位（HU）值是通过直接的CT图像测量来确定的。这些测量取决于用于检查CT图像的窗宽/窗位以及进行脂肪组织追踪的个人。
方法
采用间接方法，提出了一个新的参考区间（RI）。从常规腹部CT检查中总共收集了4000份脂肪组织样本。然后使用其平均值的累积频率图的线性部分计算线性回归方程。
结果
确定腹部总脂肪的回归函数为y = 35.376*x - 123.48，并计算出95%置信参考区间为-123至-89。在内脏和皮下区域的平均脂肪HU值之间观察到3.82的显著差异。
结论
使用统计方法和患者数据的体内测量，确定了一系列与理论值一致的脂肪HU参考区间。
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