Brachytherapy Ultrasound QA Phantom CIRS 045A
Part of a complete solution for implementing a prostate
brachytherapy QA program as described by AAPM Task Group 128

A robust quality assurance prostate brachytherapy QA program is essential to ensure accurate image-guidance and dosimetry calculations.1

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 align with the electronic grid that appears on your screen to ensure 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.

Brachytherapy Ultrasound QA Phantom CIRS 045A - Targets

Brachytherapy Ultrasound QA Phantom CIRS 045 - Ultrasound

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

Dimensions 15.2 cm x 11.4 cm x 11.4 cm
(6" x 4.5" x 4.5")
Phantom Weight 4 lbs (1.5 kg)
Background Material: Zerdine®(2)
Attenuation Coefficient: 0.5 dB/cm/MHz
Speed of Sound: 1540 m/s
Model 045A Includes
Qty Description
1 Brachytherapy QA Phantom
1 Carry Case
1 User Guide
Optional Accessories
Model No. Description
053S Tissue-Equivalent Ultrasound Prostate Phantom
  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.
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