Mini CT Phantom

Lightweight, compact, and portable
Ideal for field service use
Can be used with any CT scanner, for measurement and analysis of all major CT scanner functions and radiation dose
Makes inhomogeneity corrections in radiation oncology

This highly versatile phantom is designed for routine monitoring of the consistency of all the major parameters of computed tomography (CT) image quality and radiation dose. Its unique, compact design allows for unparalleled portability, easy set up and reliable parameter determin-ations. It is perfect for use by physicists, technologists and service engineers.

The disc section consists of a 1 inch thick Lucite® disc with a 6 inch diameter. The six large holes are for the placement of inserts for evaluation of CT number consistency and evaluation of image resolution. The four small holes are for inserting an ion chamber at different locations within the phantom. Lucite inserts are provided to fill the four small holes, when necessary.

The disc section is attached to a rectangular acrylic bar containing a thin copper wire embedded along a central groove. This section of the phantom is used to evaluate laser beam alignment and accuracy of slice thickness, slice spacing, slice contiguity, and pilot scan to transverse (longitudinal) scan correspondence. This is achieved by exposing a non-screen film (such as Flex Film Cassettes, listed below) placed underneath the phantom, and making several cuts while the phantom is advanced along the gantry in a pre-programmed manner.

The Low Contrast Resolution Insert designed for determining the CT unit’s ability to detect slight differences in contrast. Two materials with very similar CT numbers are incorporated into the low contrast resolution insert to assess the low contrast detection capability of the unit.

The Teflon® and Lung Inserts provide the CT number and density that are important when treatment planning parameters are being established for radiation therapy patients.

The Teflon-Bone Semi-Ring is used as a beam hardening ring for simulating clinical conditions. The ring has been machined to slide easily over the phantom, so that each of the inserts will the effect of beam hardening.

76-430-5555 Mini CT QC Phantom Kit, includes phantom, seven standard inserts, all seven optional inserts, Teflon-bone semi-ring and carrying case

CT Phantom

Accurately Evaluates:

Laser beam alignment
Slice thickness, spacing, and contiguity
Table movement
CT numbers and noise level
CT number uniformity
Relative radiation dose
Video monitor and image processing equipment
Scout and axial scan correspondence
High contrast resolution

SPECIFICATIONS
Dimensions 6 inch Ø, 1 inch thick, with six 1.125 inch through-holes and four 0.50 inch through-holes
Lucite Disk The Lucite disk is attached to the side of the base by two removable nylon, slotted screws Inserts Phantom is supplied with seven inserts for 1.125 inch holes; 1 each of: Plastic Water®, bone-equivalent, polystyrene, polycarbonate, polyethylene, nylon, and one acrylic high-contrast resolution insert
Lucite Base 11.94 inch long x 1.81 inch wide x 0.69 inch thick, with copper wire (approx. 0.020 inch) fixed into a 0.020 inch deep groove centered on the base
Weight 3 lb (1.36 kg)