Southwestern Imaging - Siemens ECAT EXACT 47

Patient Handling System

ECAT EXACT 47

Detector Material	Bismuth Germanate (BGO
Crystal Dimensions	6.29 x 6.29 x 20 mm deep (0.25 x 0.25 x 0.79 in.)
Crystal's Per Detector Block	64
Number of Detector Blocks	144
Photomultiplier Tubes (PMTs)	4 per block
Detector Ring Diameter	824 mm (32.4 in.)
Number of Detector Rings	24
Total Number of Crystals	9,216
Transaxial FOV	583 mm (23 in.)
Axial FOV	162 mm (6.38 in.)
Number of Contiguous Image Planes	47
Plane Spacing	3.375 mm (0.13 in.)

Transaxial Resolution^a (NEMA 2001)
FWHM @ 1 cm	6.0 mm (2D) 6.0 mm^b(3D)
FWHM @ 10 cm	6.7 mm (2D) 6.7 mm^b(3D)
Axial Resolution^c (NEMA 2001)
FWHM @ 0 cm	4.5 mm (2D) 4.6 mm (3D)
FWHM @ 10 cm	5.9 mm (2D) 6.5 mm (3D)
Sensitivity @ 350keV^d	180 kcps/µCi/cc & 4.86 cps/Bq/cc (2D) 780 kcps/µCi/cc^d & 21.1 cps/Bq/cc (3D)
Uniformity	<10% variation (2D&3D)
Count Rate Correction	±5% up to 3.0 µCi/cc (111 kBq/cc) (2D) ±5% up to 0.5 µCi/cc (18.5 kBq/cc) (3D)
a. Average radial and tangential. b. Central planes 13-35 c. 2-D specifications are based on NEMA Axial Slice Width measurements 3-D specifications are based on NEMA Axial Resolution measurements d. Scatter subtracted