Table 1.

Summary of imaging parameters for post-nCRT T2w MRI scans used in this study.

Imaging Parameter	Institution 1 UHCMC (n = 52)	Institution 2 CCF (n = 31)	Institution 3 VAMC (n = 11)
In-plane Resolution (mm)	0.256–0.977	0.313–0.898	0.398–0.938
Slice Thickness (mm)	3.0–5.0	3.0–6.0	3.0–8.0
Field of view (px)	224–576 $\times$ 224–576 $\times$ 20–57	256–640 $\times$ 252–640 $\times$ 13–79	234–576 $\times$ 256–528 $\times$ 24–50
Repetition Time (ms)	3253–12690	3400–13333	3420–7200
Echo Time (ms)	67–110	84–166	80–100
Sequence	TSE	TSE	FSE
Magnet Strength
3 T	51	3	8
1.5 T	1	28	3
Scanner
Siemens Symphony		6
Siemens Avanto		14
Siemens Espree		3
Siemens Aera		4
Siemens Skyra		3
Siemens Verio	39
Philips Achieva		1	8
Philips Medical System Ingenuity	5
Philips Healthcare Ingenia	8
Toshiba Titan			2
Unknown			1
Imaging Plane Axial Through Tumor
Transverse	43	28	10
Coronal	9	3	1
Gel use	Yes	Yes	No

UHCMC = University Hospitals Cleveland Medical Center; CCF = Cleveland Clinic Foundation, VAMC = Louis Stokes Veterans Affairs Medical Center.