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Gamma
Ray Imaging System
Fast
~ Portable
~ Spectroscopic
The RMD RadCam™
produces images of gamma radiation superimposed over a black
and white video image of the same field of view. The intensity
of the gamma radiation is presented in color with progressively
brighter colors corresponding to higher gamma activity. In
addition, spectra showing the isotopes present are shown for
user-selected areas of the image.
Standard System
The system runs in each of four basic modes:
- Pinhole collimator (high intensity applications)
- Coded aperture collimator (greater system sensitivity)
- Wide system field-of-view
- Narrow system field-of-view
System includes one coded
aperture collimator, one pinhole collimator, and the RMD RadCam™
software.
RMD RadCam™ software:
- Obtains image
- Displays an energy spectrum from an area-of-interest
in the image
- Displays an entire image based on spectral region-of-interest
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Features and Applications
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The monitor of the RMD RadCam™ system presents a video
image of the interrogated scene. Onto this image the RMD RadCam™
gamma camera acquires and superimposes a color-coded nuclear
image based on the location, energy, and intensity of gamma
radiation from the interrogated scene.
Features
Detects gamma radiation. The pin-hole collimator, the coded-aperture
collimator, and user-set data acquisition time give the system
a wide range of sensitivity to gamma radiation.
The RMD RadCam™ shows the location of radioactivity
and a spectrum of the detected gamma photons. This
spectroscopic feature helps the user identify the presence
of isotopes such as 137Cs, 60Co, or
57Co.
The mask, anti-mask position of the coded-aperture collimator
enhances nuclear image quality by reducing background gamma
events that do not correlate with gamma sources located in
the nuclear camera's gamma-radiation field-of-view.
The system is constructed for field use and includes a rugged
lap-top computer.
Applications
The RMD RadCam™ may be applied to nuclear safeguards,
radiation protection, and homeland security, such as the remote
analysis of debris of a possible dirty bomb.
RMD RadCam™ gamma radiation detection strengthens nuclear
security and reactor monitoring in research reactors, test
reactors, and nuclear power generation.
RMD RadCam™ monitors a nuclear materials fuel cycle,
including refinement, fuel storage, decommissioning, site
characterization, and storage of nuclear waste.
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Technology/Specifications
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Performance
| Gamma Energy Range |
Less than 30 keV to greater than 1.5 MeV |
| Dynamic Response |
Single Image better than 10:1
SNR |
| Activity Dynamic Range |
Less than 3.7 x 104 Bq to more
than 3.7 x 1011 Bq |
| System Field of View |
Coded aperture wide 40 degrees/narrow 20
degrees |
| Nominal Time-to-Image |
2 min with CA and 3.7 x 108
Bq point source at 40 m |
| Image Interval |
4-mode: Counts, Time, Either, Both |
General
Detector: Position-sensitive Photomultiplier Tube
Scintillator: Sodium Doped Cesium Iodide (CsI(Na))
Aperture: Sintered Tungsten Coded Mask or Tungsten Pinhole
Operating System: Microsoft™ Windows XP
Control Software: RMD RadCam™ rapid, real-time, image
display, and processing. MS Windows standard file handling,
naming, and saving.
Options
The standard system configuration is suitable for most applications.
Factory-installed options may be considered upon request.
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