Table 3. MRI Findings of PAIS in Nine Patient.

Patient Number	DWI	Enhancement	TI 600	T1WI	SI Tumor/SI Muscle (T1WI)	T2WI	SI Tumor/SI Muscle (T2WI)
1	Diffusion restriction (+)	(+), heterogeneous	Intermingled dark SI	High SI	1.14	High SI	3.98
2	Diffusion restriction (+)	(+), heterogeneous	N/A	High SI	1.04	High SI	2.99
3	Diffusion restriction (+)	(+), heterogeneous	Intermingled dark SI	Intermediate SI	0.90	High SI	5.24
4	Diffusion restriction (+)	(+), heterogeneous	Intermingled dark SI	Intermediate SI	0.97	High SI	3.11
5	N/A	(+), heterogeneous	N/A	High SI	1.17	High SI	4.97
6	Diffusion restriction (+)	(+), heterogeneous	N/A	High SI	1.48	High SI	3.29
7	N/A	(+), heterogeneous	N/A	High SI	1.19	High SI	7.40
8	N/A	(+), heterogeneous	N/A	High SI	2.01	High SI	5.84
9	N/A	(+), heterogeneous	N/A	Intermediate SI	0.93	High SI	3.11

DWI = diffusion weighted image, SI = signal intensity, TI 600 = late gadolinium enhancement image using inversion time of 600 msec, T1WI = T1-weighted image, T2WI = T2-weighted image