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Nuclear Associates
07-601, 07-619 and 07-618
Fluoroscopic System Resolution Test Tools
February 2005
Manual No. 07-601-1 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
www.flukebiomedical.com/rms
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Table of Contents
Section 1: General Information................................................................................... 1-1
1.1 General Information ..................................................................................... 1-1
Section 2: Instructions ................................................................................................ 2-1
2.1 Instructions .................................................................................................. 2-1
Section 3: Test Interpretation ..................................................................................... 3-1
3.1 Test Interpretation........................................................................................ 3-1
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General Information
General Information
1
Section 1
General Information
1.1 General Information
Figure 1-1. Fluoroscopic Resolution Test Tools
Models
• 07-601 Tool, 16-60 mesh
• 07-619 Tool, 30-100 mesh
• 07-618 Tool, 60-150 mesh
These 7½” square plastic plates each have a 7” square area containing 8 groups of copper or brass mesh
screening in the following mesh-size ranges: 16 - 60 lines/inch or 30 - 100 lines/inch or 60 - 150
lines/inch. The screens are arranged in an irregular rotation to permit discrete visualization of groups.
They can also be used to optimize television system focus as well as mirror optics and image intensifier
settings.
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Nuclear Associates 07-601,07-619,07-618
Operators Manual
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Instructions
Instructions
2
Section 2
Instructions
2.1 Instructions
1. Place (or tape) the test tool in contact with the image amplifier base frame or film changer. For undertable intensifier tubes, lay the test tool on the tabletop.
2. Operate in the fluoroscopic mode at the lowest kVp and mA possible. Collimate so only the pattern is
visible with the edge limited by the collimator.
3. The test may be repeated using a suitable phantom, such as the Nuclear Associates 07-706, as a
beam block to determine clinical resolution capability.
4. For cineradiographic systems, exposure of only a few frames is needed to evaluate system resolution.
Only persons qualified to work on image intensifier
x-ray systems should attempt to focus and align
them. Testing to the stated criteria will indicate
proper performance. If the system falls short of its
capabilities, contact qualified
service personnel.
CAUTION
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Nuclear Associates 07-601,07-619,07-618
Operators Manual
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Test Interpretation
Test Interpretation
Section 3
Test Interpretation
3.1 Test Interpretation
1. A 6” image intensifier system observed via the monitor should be capable of resolving 30 mesh in
the center of the field, and a 9” system must display at least 20 mesh.
It has become common practice to adjust the television to flatten the top and bottom of the 9” field so
that only about 8” of the field are visible at the entrance aperture (most 9” image intensifier tubes are
really 8½ “ diameter). Therefore, most 9” systems should resolve 24 mesh. If the 6” systems are
similarly adjusted so that a 5” field is displayed, then they should resolve 35 mesh via the monitor.
When 9” systems are in the magnified mode, they must resolve 30 mesh and may resolve 35 mesh
via the monitor.
The monitor must be adjusted for both optical and electrical focus. It is a common occurrence in
many optical systems for the lens mount or the camera tube mount to become loosened with age so
that, when the position of the system is altered, it goes out of focus mechanically. If possible, tilt the
entire x-ray system and determine that the entire system remains in good focus.
2. Film camera systems must resolve everything present at the output phosphor. The camera should
be used to photograph the mesh pattern, and the lens adjusted for best focus during a series of test
exposures. The lens iris and x-ray factors should be adjusted for acceptable noise…decrease the
iris diameter and raise the mAs/image to decrease noise.
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Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
www.flukebiomedical.com/rms
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