Single Wall Single Image (SWSI)
film inside, source outside
Single Wall Single Image (SWSI)panoramic
film outside, source inside (internal exposure)
Double Wall Single Image (DWSI)
film outside, source outside (external exposure)
Double Wall Double Image (DWDI)
film outside, source outside (elliptical exposure)
X or Gamma radiation is imposed upon a test object
Radiation is transmitted to varying degrees dependent upon the density of the material through which it is travelling
Thinner areas and materials of a less density show as darker areas on the radiograph
Thicker areas and materials of a greater density show as lighter areas on a radiograph
Applicable to metals,non-metals and composites
Permanent record
Little surface preparation
Defect identification
No material type limitation
Not so reliant upon operator skill
Thin materials
Expensive consumables
Bulky equipment & Slow results
Harmful radiation & Very little indication of depths
Defect require significant depth in relation to the radiation beam (not good for planar defects)
Access to both sides required
