OOGA_Digital X-ray Chapter 7 CR Baseline and Process Controls

1. The best measurement of Computed Radiography (CR) system performance for any application is:

Performed with a special micro-densitometer The use of an RQI (representative quality indicator) A conventional plaque IQI The wire type IQI

2. The use of a Representative Quality Indicator (RQI) is described by

The use of an actual or simulated part containing actual or simulated minimal features (discontinuities) that must be reliably detected. The application of multiple thickness steps and single wire quality indicators The use of SNR values determined at various areas of interest within the component image. The application of multiple RIQI type image quality indicators to establish EPS.

3. System performance should be evaluated at _________________________ ___________, as agreed upon by the supplier and user, to minimize the possibility of time-dependent performance variations.

Sufficiently frequent interval Specific SNR levels Low exposure levels High exposure levels

4. Per ASTM E2033, Computed Radiography (CR) system performance measurements can be performed with

A CR phantom A calibrated line pair test pattern (LPG) and a step wedge (CS gauge) The CR phantom Film standards

5. Environmental controls for Computer Radiography (CR) system use include:

Humidity Noise levels Ambient lighting A comfy chair All of the above

6. Equivalent Penetrameter Sensitivity (EPS) may be used in radiography when

IQI's of a certain nature are specified IQI's are not specified IQI's are sometimes specified Specified IQI's are not available

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OOGA_Digital X-ray Chapter 7 CR Baseline and Process Controls

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