Characterization of Enhancing MS Lesions by Dynamic Texture Parameter Analysis of Dynamic Susceptibility Perfusion Imaging

Table 3

Post hoc analysis (Games-Howell test) of all 19 texture parameter maps (TPMs) that discriminated significantly between EL+, EL−, and NEL in one-way ANOVA.

	Stat. par.	Time period	values
			ANOVA	EL+ versus EL−	EL+ versus NEL	EL− versus NEL
TPM-ORIG	SD	RP	<			0.695
TPM-ORIG	VAR	RP	<		0.05	0.82
TPM-DIFF	Mean	IF		0.117		0.356
TPM-DIFF	Mean	RP	<			1
TPM-DIFF	SD	OF	<			0.429
TPM-DIFF	SD	RP	<			0.323
TPM-DIFF	VAR	OF		0.084		0.642
TPM-DIFF	VAR	RP		0.248	0.231	0.254
TPM-DIFF	VARVAR	RP		0.295	0.332	0.967
TPM-SD	Mean	OF	<	0.2
TPM-SD	Mean	RP	<			0.063
TPM-SD	SD	RP		0.247	0.209	0.641
TPM-SD	VAR	RP		0.396	0.388	0.786
TPM-SD	VARVAR	RP		0.412	0.301	0.295
TPM-VAR	Mean	OF		0.364	0.128	0.119
TPM-VAR	Mean	RP		0.201	0.167	0.11
TPM-VAR	SD	OF		0.479	0.231	0.372
TPM-VAR	SD	RP		0.353	0.331	0.385
TPM-VAR	VARVAR	RP		0.373	0.368	0.517

Note: ORIG: raw image, DIFF: difference image, SD: standard deviation, VAR: local variance, IF: inflow, OF: outflow, RP: reperfusion, EL+: enhancing lesions with increased permeability, EL−: enhancing lesions with subtle permeability, and NEL: nonenhancing inactive lesions; .