BDA Radiography and Radiology 2026 Exam
Questions & Correct Answers with Rationales |
Guaranteed Success
What's direct action film? - Answer -Intra oral film. Only sensitive to x-ray
photons
What's indirect action film - Answer -Extra oral with intensifying screen &
cassette. sensitive to light photons
Why is direct action film used for intra oral - Answer -For excellent image
quality
black paper is used on either side of the film to protect the film from...? -
Answer -Light
, damage by fingers
saliva that may leak into film packet
Why is a thin sheet of lead foil placed behind the film? - Answer -To stop
residual radiation going further into pt tissues
To stop secondary radiation from scattering back onto film and degrading the
image
If film was placed wrong way in pts mouth the lead foil would show on radiograph
making the fault easily identified
Increasing the Ma will make the image - Answer -too dark/blacken
Decreasing the mA will make the image - Answer -Too white / light
What % of energy is conducted as heat and X-rays ? - Answer -Heat -99%
Xrays - 1%
What is the recommended FSD - Answer -200mm or 20cm
Questions & Correct Answers with Rationales |
Guaranteed Success
What's direct action film? - Answer -Intra oral film. Only sensitive to x-ray
photons
What's indirect action film - Answer -Extra oral with intensifying screen &
cassette. sensitive to light photons
Why is direct action film used for intra oral - Answer -For excellent image
quality
black paper is used on either side of the film to protect the film from...? -
Answer -Light
, damage by fingers
saliva that may leak into film packet
Why is a thin sheet of lead foil placed behind the film? - Answer -To stop
residual radiation going further into pt tissues
To stop secondary radiation from scattering back onto film and degrading the
image
If film was placed wrong way in pts mouth the lead foil would show on radiograph
making the fault easily identified
Increasing the Ma will make the image - Answer -too dark/blacken
Decreasing the mA will make the image - Answer -Too white / light
What % of energy is conducted as heat and X-rays ? - Answer -Heat -99%
Xrays - 1%
What is the recommended FSD - Answer -200mm or 20cm
