Improved Performance of Compartments in Detecting the Activity of Axial Spondyloarthritis Based on IVIM DWI with Optimized Threshold Value

Table 4

Comparison of , , and of patients in the active, inactive, and control groups using different threshold values.

Parameter	Active group	Inactive group	Control group
Threshold  s/mm^2
(10^-3 mm^2/s)		^#	^#,	<0.001
(%)				0.751
(10^-3 mm^2/s)		^#	^#,	<0.001
Threshold  s/mm^2
(10^-3 mm^2/s)		^#	^#,	<0.001
(%)				0.172
(10^-3 mm^2/s)		^#	^#,	<0.001
Threshold  s/mm^2
(10^-3 mm^2/s)		^#	^#,	<0.001
(%)			^#	0.031
(10^-3 mm^2/s)		^#	^#,	<0.001

Except where indicated, data are the . : pure diffusion coefficient; : perfusion fraction; : pseudoperfusion coefficient. ^# vs. the active group; vs. the inactive group. was considered statistically significant.