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2 - Radiation hazards and protection

Published online by Cambridge University Press:  05 July 2011

Shahzad Ilyas ,
Tomasz Matys ,
Nasim Sheikh-Bahaei ,
Adam K. Yamamoto  and
Martin J. Graves
By
S. Ilyas  and
N. Sheikh-Bahaei
Shahzad Ilyas
Affiliation:
Addenbrooke’s Hospital, Cambridge, UK
Tomasz Matys
Affiliation:
Addenbrooke’s Hospital, Cambridge, UK
Nasim Sheikh-Bahaei
Affiliation:
Addenbrooke’s Hospital, Cambridge, UK
Adam K. Yamamoto
Affiliation:
Addenbrooke’s Hospital, Cambridge, UK
Martin J. Graves
Affiliation:
Addenbrooke’s Hospital, Cambridge, UK
S. Ilyas
Affiliation:
Cambridge University Hospitals NHS Foundation Trust
N. Sheikh-Bahaei
Affiliation:
Cambridge University Hospitals NHS Foundation Trust
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Summary

  1. Concerning radiation damage to tissues, which of the following are correct?

  2. It is caused directly by photoelectrons

  3. Cells with high mitotic rates are less affected

  4. It is caused by free radicals

  5. Secondary electrons cause damage to tissue in a linear pattern

  6. It is caused directly by X-rays

  1. Which of the following are true regarding dosimetry?

  1. Kerma takes into account the type of tissue being irradiated

  2. The absorbed dose is measured in grays (Gy)

  3. The equivalent dose takes into account the radiation weighting factor (wR)

  4. The effective dose is measured in Gy

  5. 1 Gy = 1 J g−1

  1. Regarding radiation dose:

  1. Linear energy transfer (LET) is the total energy deposited by a particle along its entire path

  2. An alpha particle has a lower LET than an electron

  3. Particles with high LET are more hazardous than low-LET particles

  4. The effective dose takes into account the radiosensitivity of the tissues

  5. 1 Sv = 1 J kg−1

  1. Which of the following are correct regarding deterministic effects of radiation?

  1. It has a minimum threshold below which it does not occur

  2. The severity of the effect increases with dose

  3. The probability of the effect occurring increases with dose

  4. Breast cancer is a type of deterministic effect

  5. […]

Type
Chapter
Information
Physics MCQs for the Part 1 FRCR , pp. 15 - 27
Publisher: Cambridge University Press
Print publication year: 2011

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