Table 1.

Summary of some of the previously studied breast-dedicated PET system instrumentation. (PMT: photomultiplier tube, PD: photodiode, APD: avalanche photodiode, PSAPD: position-sensitive APD; DOI: depth of interaction)

	System geometry	Scintillation materials	Detectors	Crystal element size (mm)	DOI capability
PEM-I (Murthy et al 2000)	Dual panel	BGO	PMT	Continuous crystal	No
MDAPET (Baghaei et al 2000)	Partial ring	BGO	PMT	2.7 × 2.8 × 19	No
MaxPET (Doshi et al 2000)	Dual panel	LSO	PSPMT	3 × 3 × 20	No
BPET (Freifelder et al 2001)	Two curve plates	NaI (Tl)	PSPMT	Continuous crystal (~4.5)	No
Moses and Qi 2004	Box	LSO	PD/PMT	3 × 3 × 30	10 mm
Clear-PEM (Santos et al 2004)	Dual panel	LSO	APD	2 × 2 × 20	2 mm
CYBPET (Karimian et al 2005)	Ring	BGO	APD	3 × 5 × 20	No
Weinberg et al 2005	Dual panel	LYSO	PSPMT	2 × 2 × 10	No
Zhang et al 2007a	Dual panel	LSO	PSAPD	1 × 1 × 3	3 mm