纹理多参数分析在帕金森病患者脑磁化率定量中的应用研究

赵欣欣, 裴孟超

Study on multi-parametric texture analysis for quantifying brain magnetic susceptibility in patients with Parkinson′s disease

ZHAO Xinxin, PEI Mengchao

表1 基于 GLRLM的纹理参数的方程描述

Tab 1 Description and equation of texture parameters based on run-length matrix （GLRLM）

Feature	Description	Equation
RLNonUni	run length non-uniformity	$\frac{\sum_{j = 1}^{N_{r}} {(\sum_{i = 1}^{N_{g}} p (i, j))}^{2}}{C}$
GLevNonU	gray-level non-uniformity	$\frac{\sum_{i = 1}^{N_{g}} (\sum_{j = 1}^{N_{r}} p {(i, j))}^{2}}{C}$
LngREmph	long-run emphasis	$\frac{\sum_{i = 1}^{N_{g}} \sum_{j = 1}^{N_{r}} j^{2} p (i, j)}{C}$
ShrtREmp	short-run emphasis	$\frac{\sum_{i = 1}^{N_{g}} \sum_{j = 1}^{N_{r}} \frac{p (i, j)}{j^{2}}}{C}$
Fraction	fraction of image in runs	$\frac{\sum_{i = 1}^{N_{g}} \sum_{j = 1}^{N_{r}} p (i, j)}{\sum_{i = 1}^{N_{g}} \sum_{j = 1}^{N_{r}} j p (i, j)}$