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

Table 1

Summary of MRI scan parameters.

Sequences	TSE T1WI mDixon	TSE T2WI mDixon	T1-TSE	T2W-SPAIR	IVIM DWI
Plane	Coronal	Coronal	Axial	Axial	Axial
TR/TE (ms)	569/20	2300/85	500/10	5200/70	4000/63.5
Thickness (mm)	3	3	6	5	4
Field of view (mm)
Intersection gap (mm)	0.5	0.5	1	0.5	1
SENSE factor	2.6	2	1.8	2.3	2.8
Matrix
Number of signal average (NSA)	1	1.5	1	1.2	2

IVIM DWI was based on values = 0, 10, 20, 30, 50, 600, and 800 s/mm².