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| Fluke Biomedical Stock Number: 76-711 |
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PHANTOM, DSA* Available with three concentrations of iodine! *This phantom conforms to the recommendations in Report #15 by the American Association of Physicists in Medicine (AAPM)-Digital Radiography/Fluorography Task Group of the Diagnostic X-Ray Imaging Committee. Every important digital image parameter (Conventional fluoroscopy equipment is used for checking the non-digital functions of DSA systems.) of a DSA system is easy to evaluate with this QA test tool. Its modular format allows you to purchase only the parts needed to test particular parameters. If your needs change, other components of the system can always be added. The phantom consists of nine components. When some of them are combined, additional functions can be evaluated. For example, the two-piece step wedge serves as a dynamic range measurement tool. However, when "folded" on itself, it becomes a solid, 3" thick, body block. When used with the slot block, it forms a 6" thick plastic mass that simulates body x-ray absorption during tests. Five inserts are available: (1) Low-Contrast Artery Insert has vessels with varying diameters and iodine concentrations. (2) Low Contrast Iodine Line-Pair Insert is used for quantitative resolution measurements. (3) Resolution High-Contrast Pattern Insert accepts lead line-pair test patterns of two different lead thicknesses. (4) Linearity Insert has six regions, each with a different iodine thickness. (5) Blank Insert is used to make the mask images for the others. Also available is a Registration Plate with an all-over hole pattern that detects changes in pixel position between the test image and the mask image. CHOOSE FROM THE FOLLOWING SYSTEM COMPONENTS; (A) Slot Block (76-712): This 20 x 20 x 7.5 cm acrylic block has an opening that holds and positions the insert sections. 6 lbs. (B) Bone Block (76-713): For checking the effectiveness of the subtraction process and its resistance to the formation of subtraction artifacts. Measures 20 x 20 x 2.5 cm and contains three simulated bones (0.5, 1 and 1.5 cm thick respectively and 2.5 cm wide). 3 lbs. (C) Step Wedge (76-711): Tests a machine's dynamic range by its ability to subtract all steps. Six acrylic steps, each 2.5 cm high, form a wedge whose total dynamic range is approximately 40:1 depending on the kVp setting. When the upper three steps are "folded" over the lower three, the wedge becomes a solid block, 20 x 20 x 7.5 cm thick. This, together with the slot block, simulates a patient's body attenuation. 7 lbs. (D) Blank Insert (76-714): Simulates body tissue before iodine injection when making a mask image. 15 x 20 x 2.5 cm. 2 lbs. (E) High-Contrast Resolution Pattern Insert (76-717): This 15 x 20 x 2.5 cm acrylic insert has recesses for holding up to three square lead test patterns. Test patterns are not included with the insert. 2 lbs. (F) Linearity Insert (76-719): Six regions, each with a different iodine thickness, are arranged in a circle on a 15 x 20 x 2.5 cm block. Iodine values are 0.5, 1, 2, 4, 10 and 20 mg/cm2. 2 lbs. (G) Low-Contrast Artery Insert (76-715): Iodine-filled channels in this 15 x 20 x 2.5 cm block simulate three sets of vessels (0.5, 1, 2 and 4 mm diameter). Each set has a different iodine concentration - 2.5, 5 and 10 mg/cc. 2 lbs. (H) Low-Contrast Iodine Line-Pair Insert (76-716): Contains two sets of line-pair groups- 1, 0.7, 0.5, 0.35, 0.25, 0.175, and 0.125 2LP/mm. one set has an iodine area density of 0.5 mg/cm2, the other is 1.0 mg/cm2. Measures 15 x 20 x 2.5 cm. 2 lbs. X-Ray Test Patterns for High-Contrast Insert. Resolution range is 0.6 to 5.0 LP/mm. Insert accepts up to three test patterns. Choice of lead thickness: 0.01 mm (07-527) or 0.1 mm (07-538-1 or 07-538.2). Registration Plate (76-718): Made of aluminum 20 x 20 x 1.6 mm, with an overall pattern of 3 mm holes. When x-rayed twice, and one image is subtracted from the other, the resulting picture shows any pixel misregistration that may have taken place between x-rays. Misregistration correction is easily tested. 4 oz. |
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