Diagnostic Radiology Question Bank

Sample

1. Radionucleotide(s) used in external beam therapy:

The correct answer is (B) "Co-60". This option is the one consistent with the established radiological/anatomical facts; the other choices do not fit.

Sample

2. Stereotactic surgery is used for treat ment of:

The correct answer is (B) "Lung carcinoma". This option is the one consistent with the established radiological/anatomical facts; the other choices do not fit.

Sample

3. That is atomic number:

The correct answer is (A) "Proton". MRI/NMR is based on the behaviour of hydrogen protons (spins) in a magnetic field; time-of-flight is a flow-based MR angiography technique not requiring contrast.

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4. Substance with same atomic number but different mass number:

The correct answer is (A) "Isotope". This option is the one consistent with the established radiological/anatomical facts; the other choices do not fit.

Sample

5. Principle used in radiotherapy is:

The correct answer is (B) "Ionization of molecules". This option is the one consistent with the established radiological/anatomical facts; the other choices do not fit.

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6. Ionization radiation acts on tissue leading to:

The correct answer is (B) "Excitation of electron from orbit". Imaging rooms using ionising radiation are shielded with lead to absorb scattered X-rays and protect staff and the public.

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7. Functional basics of ionizing radiation depends on:

The correct answer is (B) "Removal of orbital electron". Radiation pneumonitis/fibrosis produces consolidation or fibrosis conforming to the radiation port with a sharp non-anatomical straight margin.

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8. Most sensitive structure in cell for radiotherapy is:

The correct answer is (C) "DNA". This option is the one consistent with the established radiological/anatomical facts; the other choices do not fit.

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9. Which of the following statements best describes 'Background Radia tion'?

The correct answer is (C) "Radiation present constantly from natural sources". Radiation pneumonitis/fibrosis produces consolidation or fibrosis conforming to the radiation port with a sharp non-anatomical straight margin.

Sample

10. Principles of linear accelerators are used in:

The correct answer is (A) "X-rays". Cathode rays are accelerated electrons; in an X-ray tube/linear accelerator electrons are accelerated and strike a target to produce radiation.