Quantification and significance of extraprostatic findings on prostate MRI: a retrospective analysis and three-tier classification

Insights into Imaging

Table 1 Protocols used during the study period

Protocol	Scanner	Patients, n	Age, years ± SD	Feet-head coverage	Large FOV	Limited FOV	DCE, n (%)	Findings per patient
P1	Ingenia Elition	77	68.0 ± 7.8	Kidney-perineum	T2SSh sag, T1 DIXON tra	T2 tra, T2-3D, DWI (± DCE)	3 (3.9%)	2.6 ± 1.2
P2	Ingenia Elition	128	68.7 ± 7.6	Pelvic rim-perineum	T1 DIXON tra	T2 tra, T2 sag, T2-3D (± DCE)	7 (5.5%)	2.3 ± 1.1
P3	Magnetom Skyra	418	67.9 ± 8.4	Kidney-perineum	True-FISP sag	T2 tra, T2 sag, T2 cor (± DCE)	412 (98.5%)	1.8 ± 1.1
p value			0.60				< 0.0001^a	< 0.0001^b

FOV, field of view; T2SSh, T2 weighted single-shot sequence; DIXON, T1 weighted gradient echo sequence; True-FISP, T2 weighted sequence with steady-state precession; DWI, diffusion-weighted imaging; DCE, dynamic contrast enhancement; tra, transverse plane; cor, coronal plane; sag, sagittal plane
^aSignificant between P1 vs. P3 and P2 vs. P3
^bPost hoc tests significant for P1 vs. P3 and P2 vs. P3