Oprax Medical Inc.

Brachytherapy QA Phantom.

Computerized Imaging Reference Systems, Inc! Part of a complete solution as described by AAPM TG128

A robust quality assurance prostate brachytherapy QA program is essential to ensure accurate image guidance and dosimetry calculations. The CIRS Model 045A used in conjunction with the CIRS Model 053G Ultrasound Prostate Phantom offers a complete solution for implementing a QA program specific to transrectal ultrasound used for guidance of prostate brachytherapy as recommended by AAPM Task Group 1281.

The Model 045A enables users to check key imaging parameters such as depth of penetration, axial and lateral resolution, distance measurements, area measurements, volume measurements and geometric consistency with the treatment planning computer.

When scanning towards the top of the phantom, a partial grid of wires appears. This N-shaped pattern should line up with the electronic grid that appears on your screen thus ensuring correct vertical and horizontal distance measurements. This target group can also be used to assess axial and lateral resolution of the system. Five cross wires are embedded within the phantom to determine if the probe is being retracted by the stepper system by the specified distance.

Turn the probe 60 degrees to the right or left to visualize and measure the volume of three different calibrated objects, one of which is non-spherical.

  • Implement a QA program as described by AAPM Task Group 1281 including:
  • -Depth of penetration
    -Distance, area and volume measurements
    -Geometric consistency

  • Includes rugged carry case.
  • User Guide.
  • 4-year warranty.

  • Model 045A Specifications:
    Dimensions: 6" X 4.5" X 4.5" (15.2cm X 11.4cm X 11.4cm)
    Phantom Weight: 4lbs (1.5kg)
    Background Material:
    Zerdine® 2 solid elastic water-based polymer.
    Freezing Point: 0°C
    Melting Point: Above 100°C
    Attenuation Coefficient: 0.50 dB/cm-MHz
    Velocity of Sound Through Background Medium: 1540 m/s ± 10 m/s

    Internal Grid Assessment...
    Material: Nylon Monofilament
    Diameter: 0.5mm
    Number of Targets: 13
    Position: B1-B5, C4, D3, F1-F5

    Stock #
    Your Price
    Brachytherapy QA Phantom

    Probe Retraction Assessment...
    Material: Nylon Monofilament
    Diameter: 0.1mm
    Number of Targets: 5
    Spacing: 0.5cm and 1.0cm
    Position: Along Row 4
    Material: Zerdine® 2 solid elastic water-based polymer.
    Sizes: Approximately 4cc (S), 9cc (M), and 20cc (L). Measured volumes provided on certificate of compliance.
    Contrast: Brighter than background.

    (1) Pfeiffer, Douglas, et al., AAPM Task Group 128: Quality assurance tests for prostate brachytherapy ultrasound systems. Med. Phys., vol. 35 (12). pgs. 5471-5489, December 2008.
    (2) US PATENT# 5196343

    Complete your QA solution by also purchasing the Model 053G Ultrasound Prostate Phantom. The Model 053G can be used to verify alignment of the physical needle template with the electronic grid.