This reference radiograph provides a series of test targets to provide a vehicle for the evaluation of spatial resolution, density contrast sensitivity, dynamic range, and spatial linearity as well as other aspects of a digitization system. The test targets are suitable for evaluating a digitization system with a spatial resolution down to ∼1/1000 in. (25 micrometres (μ)) a density contrast sensitivity down to 0.02 optical density (OD), a density range of 0.5 to 4.5 OD, and a film size capacity of 14 in. (355 mm) wide by 17 in. (431 mm) long. The reference radiograph has five types of targets that may be used to evaluate various parameters of the digitization system. The targets are located within a background density of ≈ 3.0 OD. The reference radiograph is divided into three areas with sizes of 8 in. (203 mm) by 10 in. (254 mm), 11 in. (279 mm) by 14 in. (355 mm), and 14 in. (355 mm) by 17 in. (430 mm). These have been created for digitization systems unable to accommodate film sizes up to 14 in. by 17 in.
Reference Radiographs are nondestructive testing standards universally accepted because of their high reliability in accept-reject actions.
A copy of the current ASTM standard is included with the purchase of this reference radiograph.
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