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Nuclear Associates 76-890
(UB) Gamma Camera Test Pattern
March 2005
Manual No. 76-890-1 Rev. 2
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Users Manual
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Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
120 Andrews Road
Hicksville, New York 11801
516.870.0100
www.flukebiomedical.com/rms
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Table of Contents
Section 1: General Description................................................................................... 1-1
1.1 University at Buffalo (UB) Gamma Camera Test Pattern............................. 1-1
1.2 Imaging the UB Test Pattern........................................................................ 1-2
1.2.1 Extrinsic (System) Images Using a Co-57 Flood Source ............................. 1-2
1.2.2 Extrinsic (System) Images Using a Tc-99m Flood Phantom (Fill Type)
Source ......................................................................................................... 1-2
1.2.3 Intrinsic Images Using a Tc-99m “Point” Source.......................................... 1-2
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General Description
University at Buffalo (UB) Gamma Test Pattern
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Section 1
General Description
1.1 University at Buffalo (UB) Gamma Test Pattern
The University at Buffalo (UB) Gamma Camera Test Pattern is a plastic plate with precisely machined
parallel lines, filled with a high-density eutectic metal. The 20” x 20” x 3/8” pattern consists of machined
sets of equally spaced parallel lines in an “L-shaped” configuration in each quadrant of the unit. Each
quadrant contains four equally spaced parallel line frequencies: 1/10”, 5/32”, 3/16”, and 1/4“. This pattern
allows the visual evaluation of spatial resolution and linearity for routine quality control testing using only
one camera image acquisition. The UB Test Pattern provides the same information as a 90º bar quadrant
pattern but at a quarter of the imaging time.
Figure 1-1. UB Gamma Test Pattern
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Nuclear Associates 76-890
Operators Manual
1.2 Imaging the UB Test Pattern
1.2.1 Extrinsic (System) Images Using a Co-57 Flood Source
1. Peak and tune the gamma camera for Co-57. Typically the imaging analyzer is set to 122 keV with
a 20% energy window.
2. Install the most frequently used low-energy collimator on the camera. Set the detector head so that
the collimator is facing the ceiling.
3. Place the UB Test Pattern on the collimator and the Co-57 flood source on the UB Test Pattern.
4. Acquire at least a 3 million count analog or digital image. Use the largest available digital acquisition
matrix to assure the best image quality (i.e., 256 matrix or larger).
5. Process the analog film image or display the digital image for QC review and record keeping.
1.2.2 Extrinsic (System) Images Using a Tc-99m Flood Phantom (Fill Type) Source
1. Peak and tune the gamma camera for Tc-99m. Typically the imaging analyzer is set to 140 keV with
a 20% energy window.
2. Install the most frequently used low-energy collimator on the camera. Set the detector head so that
the collimator is facing the ceiling.
3. Place the UB Test Pattern on the collimator and the Tc-99m flood source on the UB Test Pattern.
4. Acquire at least a 3 million count analog or digital image. Use the largest available digital acquisition
matrix to assure the best image quality (i.e., 256 matrix or larger).
5. Process the analog film image or display the digital image for QC review and record keeping.
1.2.3 Intrinsic Images Using a Tc-99m “Point” Source
1. Peak and tune the gamma camera for Tc-99m. Typically the imaging analyzer is set to 140 keV with
a 20% energy window.
2. Set the detector head so that the crystal is facing the ceiling.
3. Place the UB pattern on the detector surface. Prepare a syringe of Tc-99m containing 1 to 2 mCi
(37 to 74 MBq) in a volume less than 1 milliliter. Place Tc-99m point source at least 3 useful fields of
view (5 UFOV is preferred) away from the center of the detector.
4. Acquire at least a 3 million count analog or digital image. Use the largest available digital acquisition
matrix to assure the best image quality (i.e., 256 matrix or larger).
5. Process the analog film image or display the digital image for QC review and record keeping.
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Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
120 Andrews Road
Hicksville, New York 11801
516.870.0100
www.flukebiomedical.com/rms
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