ACCUSCAN Horizontal Bed Whole Body Counter

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Features

• Maximum accuracy among commercially available counters.
• Horizontal or lie down linear geometry.
• One 7.6 x 12.7 x 40.6 cm (3 x 5 x 16 in.) NaI detector (standard).
• 150 Bq (4 nCi) ⁶⁰Co LLD with eight minute count time.
• Shielded in all straight-line directions by 10 cm (4 in.) of low background steel.
• Variable count times from two minutes to over 200 minutes.
• Computer controlled scanning bed.
• Simultaneous energy and positional spectrum for accurate interpretation of data.
• Ability to locate contamination anywhere on the body, including hands and feet.
• ABACOS family software for flexibility and ease of operation.
• Extensive QA data collection program.

Available Options

• One or two Ge detectors instead of NaI.
• Two or three large NaI detectors.
• Two Ge detectors and two NaI detectors.
• Variable width slit collimator.
• ICB NIM electronics for automated operation.

Description

The ACCUSCAN was developed to provide the accuracy and flexibility of large expensive shielded rooms but at a much lower weight and cost. The basis of the design was the research of Palmer and Roesch at the Hanford Laboratories. They documented that a properly designed shadow shield has a background equivalent to a fully enclosed shield, at energies greater than approximately 250 keV.

The ACCUSCAN shadow shield is a full 10 cm (4 in.) of laminar steel in all straight line directions from the detector. The steel is specially manufactured by a process that guarantees the absence of ⁶⁰Co contaminants usually present in normal steel. It is a complete 4p shadow shield and can be used in elevated background areas. The detector cavity of the standard shield can accommodate (now or in the future) up to three large NaI detectors, one or two Ge detectors, or two NaI and two Ge detectors.

The subject is placed horizontally on the bed and automatically scanned past the detector and then returned to the start position. In addition to collection of an energy spectrum, the total count rate versus position spectrum is also displayed.

The horizontal scanning position is desirable for hospitals or other locations where subjects cannot always stand. This also makes it more convenient to do long counts.

The scanning range of the ACCUSCAN (2 m or 6.5 ft) is larger than the expected location of activity within the body. This feature makes the results obtained essentially invariant with the subject's height.

The normal detector is a single 7.6 x 12.7 x 40.6 cm (3 x 5 x 16 in.) NaI (Tl) crystal. This has a typical Lower Limit of Detection of 150 Bq (4 nCi) for ⁶⁰Co in a person with ⁴⁰K, using an eight minute count. For even lower detection limits, two or three detectors can be used. For complex spectra, one or two Germanium detectors of any size can be used. To combine the selectivity of Ge and the sensitivity of large NaI, two NaI and two Ge detectors can be used simultaneously.

The exact details of the electronics and software vary depending upon the type of the computer. The AXP family of computers and software is recommended for areas where data security is important, or where extensive networking is required, or where operation of multiple counters from a single computer is wanted. The PC family of computers is slightly lower in cost.

All CANBERRA Whole Body Counters are supplied as complete turnkey systems. They are fully assembled at the factory and thoroughly tested. All software parameters for normal WBC operation are preset and a complete calibration is performed. All items necessary for operation are supplied, including a calibration document, a US-NIST traceable calibration source, and a QA check source.

Each system includes full factory training for up to three students. Optionally, the course can be given at your location.

System Operation

The subject lies down on the bed mattress and places his feet against the base of the bed (this defines the positional reference point). The operator starts the count and the bed automatically moves to the count-start position and the data collection begins. The scan speed is automatically adjusted as a function of count time. Then the operator fills in a brief screen about that count (name, ID number, reason for count, etc.); the rest is completely automatic. The count stops when done, the bed is returned to the home position, both the pulse height and positional spectra are stored, the pulse height spectrum is analyzed, the result is displayed and/or printed, and any appropriate warning messages are presented to the operator. Then the program and counter are ready for the next person.

Specifications

SHIELD

• Total Weight - 5450 kg (12000 lb).
• Heaviest Item Weight - 450 kg (1000 lb).
• Floor Space Required - 4.6 m x 1.2 m (15 ft x 4 ft).
• Height - 0.9 m (3 ft) for NaI; 1.5 m (5 ft) for Ge.

ELECTRONIC CONSOLE (OPTIONAL

• Single Pedestal Desk - 76 x 152 cm (30 x 60 in.).
• Cable Separation from Shield - 9 m (30 ft).

POWER

• Specify - 110/220 V ac, 50 or 60 Hz.
• Requirements - Vary depending upon computer and electronics.

ENVIRONMENTAL

• Temperature - Stable to within ± 1 °C for NaI; ± 5 °C for Ge.
• Humidity - Non condensing.
• Background Radiation - Normal background assumed.
• General - Clean, dust free area.

NOTE: Please refer to CANBERRA's Product Catalog for additional details on:

• WBC Selection Guide.
• Detection Limits.
• ABACOS Software.
• CINDY Dose Calculation Software.
• Calibration Phantoms.

PHANTOM (OPTIONAL)

• 2257 CANBERRA Transfer Phantom.

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Note to our International Customers: The CANBERRA Online Quoting System is only available for our US customers. If you would like a quote on this product, please contact your Local Sales Office for assistance. We apologize for the inconvenience.
Models
2260G2KG: ACCUSCAN with ABACOS-2000/ICB NIM - HPGE	Request a Quote
2260G2KN: ACCUSCAN with ABACOS-2000/ICB NIM/NaI	Request a Quote