Relevance of 18F-DOPA visual and semi-quantitative PET metrics for the diagnostic of Parkinson disease in clinical practice: a machine learning-based inference study

EJNMMI Research

Table 3 Characteristics of the semi-quantitative metrics extracted from normalized ¹⁸F-DOPA PET data

	IPD	Controls	p value
Min SUVr median [IQR]	3.04 [2.81–3.34]	3.70 [3.37–4.07]	1.60 × 10⁻⁷
Asymmetry index median [IQR]	0.041 [0.019–0.083]	0.011 [0.005–0.021]	2.17 × 10⁻⁸
Putamen/caudate gradient median [IQR]	1.00 [0.85–1.15]	1.22 [1.13–1.30]	1.76 × 10⁻⁷
Min intra-striatal gradient median [IQR]	0.78 [0.73–0.89]	0.93 [0.89–0.96]	1.31 × 10⁻⁷