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Brachytherapy QA Phantom Model 045
Perform QA on sidefire transrectal probe

The CIRS series of ultrasound phantoms, unlike human subjects or random scannable materials, offer a reliable medium which contains specific, known test objects for repeatable qualitative assessment of ultrasound scanner performance over time. The Model 045 was designed for transrectal ultrasound QA and calibration of brachytherapy systems. It contains targets to assess volume measurements, internal grid accuracy, and probe retraction accuracy. When scanning towards the top of the phantom, a partial grid of wires appears. These wires should line up with the grid that appears on your screen thus ensuring correct vertical and horizontal distance measurements. Five cross wires are embedded within the phantom to determine if the probe is being retracted the specified distance. Turn the probe 60° to the right or left to visualize and measure the volume of three different calibrated objects, one of which is nonspherical.

(1) US PATENT #5196343
 
       Features

  • Internal grid assessment

  • Probe retraction step assessment

  • Volume verification

  • Phantom includes rugged carrying case

 

Model 045 Specifications

Material: Zerdine ®(1)

Attenuation Coefficient: 0.50 ± 0.05 dB/cm/MHz

Speed of Sound: 1540 m/s ± 6 m/s

Targets:

Internal Grid Assessment:

Material: Nylon Monofilament

Diameter: 0.5 mm

Number of Targets: 13

Position: B1 - B5, C4, D3, F1 - F5

Probe Retraction Assessment:

Material: Nylon Monofilament

Diameter: 0.5 mm

Number of Targets: 5

Spacing: 0.1 cm, 1 cm, 1.5 cm and 0.5 cm

Position: along row 4

Volumes:

Material: Zerdine®(1)

Sizes: approximately 4 cc,(S) 9 cc,(M) and 23 cc(L). Exact volumes provided on certification sheet.

 

 
 

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  President: David B. McNitt
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