Non-Hodgkin lymphoma response evaluation with MRI texture classification

Table 9 Summary table of texture parameters ranked 1-10 with Fisher and POE+ACC methods according to test subgroup T2-weighted images and imaging timepoints E1 and E3.

T2-WEIGHTED IMAGES	R&R	R&R	Wilcoxon	Wilcoxon
E1-E3 analyses	Repeatability % of total	Reproducibility % of total	Slice thickness <8 mm p	Slice thickness >= 8 mm p
HISTOGRAM PARAMETERS
MinNorm	14.090	24.380	0.003	0.130
CO-OCCURENCE MATRIX PARAMETERS
Contrast S(2,0)	19.563	41.264	0.011	0.001
Contrast S(2,2)	23.139	43.325	0.006	<0,001
Contrast S(3,0)	22.618	45.195	0.009	0.001
Correlation S(3,0)	21.555	40.965	0.007	0.001
Sum average S(3,0)	28.935	19.345	0.033	0.035
Contrast S(3,3)	23.282	48.345	0.006	<0,001
Correlation S(3,3)	22.095	44.779	0.007	<0,001
Sum average S(3,-3)	20.384	0.353	0.087	0.017
Contrast S(4,0)	26.599	44.458	0.007	0.001
Contrast S(4,4)	31.083	41.015	0.009	<0,001
Correlation S(4,4)	23.823	42.301	0.007	<0,001
Sum of squares S(4,4)	82.108	0.686	0.345	0.687
Correlation S(5,-5)	39.239	25.122	0.023	0.035
RUN-LENGTH MATRIX PARAMETERS
Short run emphasis, 90°	10.659	12.516	0.001	<0,001
Grey level nonuniformity, 45°	15.649	11.529	0.001	<0,001
ABSOLUTE GRADIENT PARAMETERS
Mean	18.036	44.271	0.002	0.001
Skewness	63.599	15.598	0.046	0.007

Texture parameters are given in rows. In the columns R&R repeatability and reproducibility of total, and Wilcoxon test for fat saturation series grouped with image slice thickness less than 8 mm, and 8 mm or thicker.

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