crackFMGE

5 marks · 1.7% of the paper

Radiodiagnosis FMGE Question Bank and Study Guide

Prepare Radiodiagnosis for FMGE with its 5-mark blueprint weight, a focused study map and a structurally validated pilot MCQ set.

Reviewed by Dr. Vivek, MBBS · Last updated

What to prioritise

Study modality selection, basic image interpretation, characteristic signs, contrast and radiation safety, and the role of radiography, ultrasound, CT and MRI in common clinical pathways.

How to use this question bank

For each scenario ask which modality answers the immediate question with acceptable risk. On images, describe density or signal, location and pattern before attaching a diagnostic label.

The free samples below are a pilot set imported from the Radiodiagnosis question package. Their structure and answer-key mapping have been validated; their short explanations and source references still need medical editorial review before they are treated as final production content.

Radiodiagnosis topics

The reviewed topic map for Radiodiagnosis is being prepared. This page will link each topic as soon as it is published.

Free Radiodiagnosis sample questions

Up to five published free questions are shown with the correct answer and explanation. Paid and draft questions are never included.

Sample question 1

Most diagnostic X-ray photons from a tungsten target are produced by rapid deceleration of electrons near nuclei. Which process is this? Which of the following is the single best answer?

  1. ACompton scattering
  2. BPhotoelectric absorption
  3. CBremsstrahlung radiation
  4. DCharacteristic radiation

Correct answer: C — Bremsstrahlung radiation

Bremsstrahlung is radiation generated when high-speed electrons are decelerated in the nuclear field.

Learning point: Bremsstrahlung

Sample question 2

Photoelectric absorption is favored by lower photon energy and higher atomic number. Which interaction explains strong subject contrast from bone? Which of the following is the single best answer?

  1. ACoherent scattering
  2. BPhotoelectric absorption
  3. CCompton scattering
  4. DPair production

Correct answer: B — Photoelectric absorption

The photoelectric effect is more likely at lower energies and rises markedly with atomic number, contributing to bone contrast.

Learning point: Photoelectric effect

Sample question 3

If the distance from a point X-ray source is doubled, the intensity at the detector changes according to which relationship? Which of the following is the single best answer?

  1. AIt falls to one-quarter
  2. BIt doubles
  3. CIt falls to one-half
  4. DIt becomes four times greater

Correct answer: A — It falls to one-quarter

Intensity is inversely proportional to the square of distance from a point source.

Learning point: Inverse-square law

Sample question 4

Increasing kVp generally produces a beam with greater penetration and lower subject contrast. Which statement is correct? Which of the following is the single best answer?

  1. AHigher kVp always increases contrast
  2. BkVp controls only magnification
  3. CHigher kVp eliminates scatter
  4. DHigher kVp generally lowers subject contrast

Correct answer: D — Higher kVp generally lowers subject contrast

Higher kVp increases photon energy and penetration; subject contrast generally decreases, while scatter control remains important.

Learning point: Tube voltage

Sample question 5

The fluoroscopic system changes exposure factors automatically to maintain image brightness when patient thickness increases. What is this system called? Which of the following is the single best answer?

  1. AMagnification mode
  2. BPulse inversion imaging
  3. CAutomatic brightness control
  4. DGrid-controlled rectification

Correct answer: C — Automatic brightness control

Automatic brightness control adjusts tube output and/or other factors to maintain displayed brightness.

Learning point: Automatic brightness control

Other high-mark subjects

Frequently asked questions

How many marks does Radiodiagnosis carry in FMGE?
Radiodiagnosis carries 5 marks in the 300-mark FMGE blueprint used by crackFMGE.
How should I practise Radiodiagnosis MCQs for FMGE?
Use the blueprint weight to set practice volume, answer mixed clinical questions, and review the full explanation for every wrong or uncertain option.