Table 2.

Characteristics and performance metrics of radiology studies available at study sites for patients during first remission, stratified by image type and indication.

	Surveillance imaging only, all types	Surveillance imaging, CT	Surveillance imaging, PET/CT	Surveillance imaging, MRI
	N = 801	N = 587	N = 205	N = 9
Radiologist diagnosis of study
No concerning findings	726 (91%)	534 (91%)	184 (90%)	8 (89%)
Concerning or positive for relapse	68 (8%)	49 (8%)	18 (9%)	1 (11%)
Non-diagnostic	5 (1%)	2 (<1%)	3 (1%)	0 (0%)
Other	2 (<1%)	1 (<1%)	0 (0%)	0 (0%)
Total true positive studies	29 (4%)	24 (4%)	4 (2%)	1 (11%)
Positive predictive value	43%	49%	22%	100%

CT: computerized tomography; PET/CT: positron emission tomography with computerized tomography overlay.