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Introduction to Radiographic Testing
2. The source size and strength the distance of the source to the test object the type of material under test
the type of film, imaging plate (IP), or digital detector used to record the image and the radiographic
setup—all are variables that affect the outcome of a radiographic test.
Safety Considerations
1. Radiographic testing uses X-ray and gamma ray sources that generate great amounts of radiation.
Radiation can cause damage to the cells of living tissue, so it is essential that personnel be adequately
protected.
2. Radiographic testing and quality assurance personnel must be continually aware of radiation hazards and
mindful of safety regulations.
3. Specially designed meters have the ability to detect X- and gamma radiation. Radiation meters, called
survey meters, are crucial instruments because radiation cannot be detected by sight, sound, touch, smell,
or taste.
Anode
Focal point
Diaphragm
Test object
Front screen
Film/IP/detector
Back screen
Sheet of lead
Figure 1: Diagram for making an industrial radiograph with X-rays.
Introduction to Radiographic Testing
2. The source size and strength the distance of the source to the test object the type of material under test
the type of film, imaging plate (IP), or digital detector used to record the image and the radiographic
setup—all are variables that affect the outcome of a radiographic test.
Safety Considerations
1. Radiographic testing uses X-ray and gamma ray sources that generate great amounts of radiation.
Radiation can cause damage to the cells of living tissue, so it is essential that personnel be adequately
protected.
2. Radiographic testing and quality assurance personnel must be continually aware of radiation hazards and
mindful of safety regulations.
3. Specially designed meters have the ability to detect X- and gamma radiation. Radiation meters, called
survey meters, are crucial instruments because radiation cannot be detected by sight, sound, touch, smell,
or taste.
Anode
Focal point
Diaphragm
Test object
Front screen
Film/IP/detector
Back screen
Sheet of lead
Figure 1: Diagram for making an industrial radiograph with X-rays.