Leeds Test Objects¡¯ FLUORO-4 phantom is designed to be used to check the image quality performance of digital and conventional fluoroscopy 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. FLUORO-4 has been designed in accordance with the DIN 6868-4 standard and features the following test details: ? Tube axis direction markings ? Limiting spatial resolution (0.6 ¨C 5.0 LP/mm) ? Low contrast resolution details (8 x 10mm diameter details, depths 0.4 ¨C 4.0 mm) ? Dynamic range (17 different thickness Cu steps each with a central 4.0mm diameter detail, depth 2.5 mm) ? kV test-area (Yb 0.78mm) ? Unstructured inner area (centre-marked) ? Radiopaque numbers indicating dynamic range steps ? FLUORO-4 should be used with either PMMA/Cu or Al attenuator plates (available separately). The phantom is supplied in a soft protective carry bag.