CT ACR 464 Phantom
- Overview
- Modules
- Specs
- Accessories
Not only is it essential for compliance, it allows the testing of: positioning and alignment; CT number accuracy; slice thickness; low contrast detectability, image resolution; image uniformity; spatial resolution; inter and intra plane distance measurement accuracy; and more.
Benefits
Expand the capabilities of your 464 with the new Low Contrast Detectability Module. This module tests the low contrast detectability of even the most demanding CT scanners using three contrast levels, scientifically-sized objects, and noise-robust redundancy.
| Material: | Epoxy interior, with a shell of our new Zero HU High Equivalency Solid Water |
| Diameter: | 20.0 cm (7.9 in) |
| Length: | 4.0 cm (1.57 in) |
| Contrast Levels: | 0.3 % (3 HU), 0.6 % (6 HU), 1.0 % (10 HU) |
| Sizes at Each Contrast Level: | 25 mm, and 2 at each of 1.5, 2, 3, 4, 5, 7, 9, and 12 mm |
| Sizes of Sub-slice Objects: | 2, 3, 5, 7, and 10 mm (cylinder diameter and length), at each contrast level |
Test high resolutions easily with this new module for
your Gammex CT ACR 464 Phantom family. This module
features line pairs with resolutions up to 32 lp/cm, all
in sizes large enough to be easy to visualize and to be
robust for automated analysis.
| Material: | Epoxy interior, with a shell of and core of our new HE CT Solid Water® |
| Diameter: | 20.0 cm (7.9 in) |
| Length: | 4.0 cm (1.57 in) |
| Resolution Pattern Size: | 1.5 cm x 1.0 cm x 4.0 cm |
| Resolutions Tested: | 2, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 and 32 lp/cm |
| Automated Analysis Features: | Solid material samples improve computational analysis Large pattern sizes enable robust evaluation |
| Contrast Material: | Zinc |
The Slice Sensitivity & Geometric Evaluation Module includes wires, bead ramps, and spherical objects to validate slice thickness, slice sensitivity profile, and system geometry.
| Material: | Epoxy interior, with a shell of and core of our new HE CT Solid Water® |
| Diameter: | 20.0 cm (7.9 in) |
| Wire Ramps: | Tungsten wire, 0.05 mm diameter |
| Bead Ramps: | One opposed set with 0.18 mm tungsten carbide BB’s, and one with 0.28 mm tungsten carbide BB’s |
| MTF BB’s: | 0.18 mm and 0.28 mm |
| MTF Wire: | Tungsten wire, 5 degrees off-vertical, 0.05 mm diameter |
| Acrylic Spheres: | 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0,and 10.0 mm diameter |
| Material: | PolZero HU Solid Water® |
| Diameter: | 20.0 cm (7.9 in) |
| Length: | 16.0 cm (6.3 in) |
| Weight: | 5.3 kg (11.7 lbs) |
Imbedded Test Objects
| MaWater Equivalent Linearity Rod: | Solid Water, Zero HU |
| Bone Equivalent Linearity Rod: | 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 6 ±0.5 HU difference) or equivalent |
| Tungsten Carbide Beads: | 0.28 mm (0.011 in) in diameter grade 25 tungsten carbide beads |
| Line pair Material: | 6061 Aluminum and Polystyrene |
| Steel Beads 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 & 4: | The average CT number a module must meet the requirements of 0 ±5 HU |
| Additional Accessories: | Phantom Stand, Soft Case, Automated Analysis Software |
The CT ACR 464 Phantom can easily be inserted into the 464 Body Ring adapter to permit fast imaging QA for a better indication assessment of a scanner’s performance with large patients.
The CT ACR 464 Phantom Extensions plates accurately represent scatter effects from widebeam CT scanners, thus eliminating the need to add a water bolus or other material when measuring the Phantom.
