TOR CDR radiography phantom is a routine test object designed to be used quickly and easily on a regular basis (e.g. weekly or monthly) to provide an ongoing check of imaging performance, particularly those aspects which are most liable to deterioration. After an initial grey-scale check, image quality is measured simply by counting the number of details detected and the number of bar-patterns resolved in the image. An ongoing record of these numbers will reveal any trend towards deterioration in imaging performance.

Used for conventional and non-subtractive digital radiography, and fluorography, enables the following checks to be made:

• Sensitometric measurements (10 test point details, 5.6mm diameter)
• Resolution limit (0.5 to 14.3 LP/mm)
• Low-contrast large-detail detectability (17 details, 11mm diameter)
• High-contrast small-detail detectability (17 details, 0.5mm diameter)

In addition to checking the consistency of radiographic performance, the test object can be used to assess the relative performance of different screen-film combinations.

Leeds Test Objects’ PIX-13 phantom is designed to be used to check the image quality performance of digital radiography x-ray systems. These tests should be carried out at acceptance to establish a baseline, and on a routine basis, keeping an on-going record of the test results, which will indicate any deterioration in performance.

PIX-13 features the following test details:

• Tube axis direction markings
• Limiting spatial resolution (0.6 – 5.0 LP/mm)
• Low contrast resolution details (6 x 15mm diameter details)
• Dynamic range (7 different thickness Cu steps)
• Unstructured are for placement of dosemeter
• Unstructured area for homogeneity and signal adjustment (centre-marked)
• Cassette size alignment markers (radiopaque)
• X-ray to light field alignment markers (radiopaque)

PIX-13 should be used with either PMMA/Cu or Al attenuator plates (available separately).

The phantom is supplied in a soft protective carry bag.