Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
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Subject contrast is determined by the following variables:<br />
- Absorption differences in the specimen<br />
- Wavelength <strong>of</strong> the primary radiation<br />
-Scatter or secondary radiation<br />
Film contrast is determined by the following:<br />
- Grain size or type <strong>of</strong> film<br />
- Chemistry <strong>of</strong> film processing chemicals<br />
- Concentrations <strong>of</strong> film processing chemicals<br />
- Time <strong>of</strong> development<br />
- Temperature <strong>of</strong> development<br />
- Degree <strong>of</strong> mechanical agitation (physical motion)<br />
Charlie Chong/ Fion Zhang
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