JPNM Physics

This document is reproduced solely for the convenience of the Joint Program in Nuclear Medicine staff. If has been found that specification sheets are not routinely carried around, but are often discussed in the presence of a networked computer. Therefore, I have posted this specification sheet. When it becomes available from ADAC, I will remove this copy and post the ADAC version, provided it still corresponds to the equipment that we own.

ADAC Vertex Epic Detectors

SPECIFICATION SHEET

Document created November 8, 1996;

Intrinsic Spatial Resolution
UFOV CFOV
FWHM 3.5 mm 3.5 mm
Intrinsic Spatial Linearity
UFOV CFOV
Absolute <= 0.5 mm <=0.35 mm
Differential <=0.2 mm <=0.15 mm
Intrinsic Detector Count Rate Performance
Input 20% Count Rate Loss >=200 kcps
Output 20% Count Rate Loss >=160 kcps
Maximum Detector Count Rate >=250 kcps
Maximum Imaging Count Rate >=200 kcps

Intrinsic Flood Field Uniformity
UFOV CFOV
Integral +/- 2.5% +/- 2.5%
Differential +/- 2.0% +/- 1.5%
Intrinsic Flood Field Uniformity at 75 kcps
UFOV CFOV
Integral +/- 3.5% +/- 3.5%
Differential +/- 3.0% +/- 1.5%
System Spatial Resolution - LEGP Intrinsic Spatial Resolution at 75 kcps
Without Scatter FWHM 8.8 mm FWHM 3.8 mm UFOV
FWTM 16.0 mm FWTM 7.3 mm UFOV
With Scatter FWHM 9.5 mm Intrinsic Energy Resolution
FWHM <= 9.8%
Whole Body System Spatial Resolution Without
Scatter: 10 cm/min scan speed Multiple Window Spatial Registration² - <=0.8 mm
Parallel Perpendicular
FWHM FWTM FWHM FWTM Point Source Sensitivity² <5%
LEGP Collimator 9.5 mm 16.6 mm 10.5 mm 18.5 mm
LEHR Collimator 8.0 mm 14.8 mm 8.8 mm 15.8 mm System Sensitivity³ 285 cpm/uCi
Volume Sensitivity per Axial Centimeter - LEGP System Volume Sensitivity - LEGP
1.3 x 10^? (c/min/kBq/cm²) 2.4 x 10⁴(c/min/kBq/cm³)

¹Static Imaging 512 Matrix Size
²NEMA 86 Method of Measurement
³System Sensitivity for LEGP for Argus, SH Genesys, and DH Genesys is 265 cpm/uCi
All specifications unless otherwise indicated are NEMA 94 Method of Measurement - Specifications are subject to change.

Document maintained by:

Douglas J. Wagenaar, Ph.D., wagenaar@nucmed.bidmc.harvard.edu


Intrinsic Spatial Resolution
	UFOV	CFOV
FWHM	3.5 mm	3.5 mm
Intrinsic Spatial Linearity
	UFOV	CFOV
Absolute	<= 0.5 mm	<=0.35 mm
Differential	<=0.2 mm	<=0.15 mm
Intrinsic Detector Count Rate Performance
Input 20% Count Rate Loss		>=200 kcps
Output 20% Count Rate Loss		>=160 kcps
Maximum Detector Count Rate		>=250 kcps
Maximum Imaging Count Rate		>=200 kcps
Intrinsic Flood Field Uniformity
	UFOV	CFOV
Integral	+/- 2.5%	+/- 2.5%
Differential	+/- 2.0%	+/- 1.5%
Intrinsic Flood Field Uniformity at 75 kcps
	UFOV	CFOV
Integral	+/- 3.5%	+/- 3.5%
Differential	+/- 3.0%	+/- 1.5%
System Spatial Resolution - LEGP					Intrinsic Spatial Resolution at 75 kcps
Without Scatter	FWHM	8.8 mm			FWHM	3.8 mm	UFOV
	FWTM	16.0 mm			FWTM	7.3 mm	UFOV
With Scatter	FWHM	9.5 mm			Intrinsic Energy Resolution FWHM <= 9.8%
Whole Body System Spatial Resolution Without Scatter: 10 cm/min scan speed					Multiple Window Spatial Registration² - <=0.8 mm
	Parallel		Perpendicular
	FWHM	FWTM	FWHM	FWTM	Point Source Sensitivity² <5%
LEGP Collimator	9.5 mm	16.6 mm	10.5 mm	18.5 mm
LEHR Collimator	8.0 mm	14.8 mm	8.8 mm	15.8 mm	System Sensitivity³ 285 cpm/uCi
Volume Sensitivity per Axial Centimeter - LEGP					System Volume Sensitivity - LEGP
1.3 x 10^? (c/min/kBq/cm²)					2.4 x 10⁴(c/min/kBq/cm³)