TABLE 1

PET Quantitative Categorization vs. Standard of Truth for Different Target and Reference Regions

Reference region	Composite region	SUVR Threshold	Sensitivity	Specificity	AUC
Pons	Small	0.62	91%	88%	0.93
	Narrow	0.58	91%	84%	0.93
	Large	0.56	91%	84%	0.92
Cerebellar gray matter	Small	1.67	86%	88%	0.90
	Narrow	1.57	86%	88%	0.89
	Large	1.63	86%	88%	0.87
Whole cerebellum	Small	1.30	91%	84%	0.92
	Narrow	1.27	88%	84%	0.92
	Large	1.23	88%	84%	0.90