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ACR CT Accreditation Phantom
Model Gammex 464
The optional phantom base (shown at left with the phantom) provides stability, makes alignment easier and features built-in leveling devices.
The Gammex 464 ACR CT Phantom is designed to be an integral part of the American College of Radiology (ACR) CT Accreditation Program. This voluntary program provides physicians with an opportunity for a comprehensive peer review
of their CT facility, personnel qualifications, image quality and quality assurance programs. CT accreditation encourages patient's confidence and demonstrates your commitment to quality health care to payers, regulatory agencies and employers. The ACR CT Accreditation Phantom can be used for initial QA assessment and routine monthly QA testing to help ensure your patients are receiving the lowest possible CT dose.
Solid Water® construction makes for a convenient, physically stable test device that provides reproducible results over time. The phantom consists of four modules designed to examine a broad range of scanner parameters. It features white scribed markings on the axial, coronal and sagittal axis, and HEAD, FOOT and TOP markings to ensure proper alignment.
Module layout of Gammex ACR CT Accreditation Phantom
Specifications
Phantom Construction
Matrix material: Solid Water, 0 ±0.5 HU or equivalent
Length: 160 mm (6.30 in.)
Diameter: 200 mm (7.88 in.)
Weight: 5.3 kg (11.75 lbs.)
Imbedded Test Objects
Water equivalent linearity rod: Solid Water, 0 ±0.5 HU or equivalent
Bone equivalent linearity rod: 955 HU Bone tissue equivalent material
Acrylic linearity rod: Cast acrylic
Polyethylene linearity rod: Low density polyethylene
Low contrast module matrix: Ciba Geigy CB4 epoxy or equivalent
Low contrast rods: Ciba Geigy CB4 epoxy (density adjusted to yield ±0.5 HU difference) or equivalent
Tungsten carbide beads: 0.011" diameter grade 25 tungsten carbide beads
Line pair material: 6061 Aluminum and Solid Water, 0 ±0.5 HU or equivalent
Steel beads: 1.00mm grade 25 chrome steel balls
Intra-module homogeneity:
The mean ROI values within any module, test objects excluded, can differ by no more than 2 HU.
Intra-phantom homogeneity, modules 1, 3 and 4:
The average CT number of a module must meet the requirements of 0 ±5 HU.Optional Phantom Stand Dimensions
Length: 228.6 mm ( 9 in.)
Width: 203.2 mm ( 8 in.)
Height: 47.63 mm (1.875 in.)
Weight: 0.5 kg ( 1.1 lbs.)Other Options: Foam-lined carrying case
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