Standard Practice for Digital Detector Array Performance Evaluation and Long-Term Stability

Importancia y uso:

4.1 This practice is intended to be used by the DDA user to measure and record the baseline performance of an acquired DDA in order to monitor its performance throughout its service as an imaging system. This practice is not intended to be used as an “acceptance test” of a DDA.

4.2 This practice defines the tests to be performed and their required intervals. Also defined are the methods of tabulating results that DDA users will complete following initial baselining of the DDA system. These tests will also be performed periodically at the stated required intervals to evaluate the DDA system to determine if the system remains within acceptable operational limits as established in this practice and defined between the user and CEO.

4.3 There are several factors that affect the quality of a DDA image including the basic spatial resolution, geometric unsharpness, scatter, signal to noise ratio, contrast sensitivity, contrast/noise ratio, image lag, and for some types of DDAs, burn-in. There are several additional factors and settings which can affect these results (for example, integration time, detector parameters, imaging software, and even X-ray radiation quality). Additionally, detector correction techniques may have an impact on the quality of the image. This practice delineates tests for each of the properties listed herein and establishes standard techniques for assuring repeatability throughout the lifecycle testing of the DDA.

Subcomité:

E07.01

Referida por:

E1695-20E01, E2698-18E01, E1161-21, E0094_E0094M-22, E2662-15R22, E2736-17R22, E2698-18E01, E0543-21, E2597_E2597M-22, E3327_E3327M-21, E2533-21, E3166-20E01, E1475-13R23, E0543-21, E2982-21

Volúmen:

03.04

Número ICS:

11.040.50 (Radiographic equipment)

Palabras clave:

bad pixels; basic spatial resolution; contrast sensitivity; DDA; duplex plate Phantom; five-groove wedge; material thickness range; SNR; spatial resolution;