FRCR MCQ ---Radiation exposure

FRCR MCQ ---Radiation exposure

348.True regarding radiation exposure in UK

a.radon represents the largest source of radiation(49%)

b.radon account for radiation exposure of 1.3mSv/year

c.the average dose of radiation is 2.2mSv/year

d.artificial sources of radiation account for an average of 0.4mSv

e.the largest artificial source of radiation is medical radiation

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FRCR MCQ--- Fetal dose  from radiological examination 

342.Correctly matched approximate dose to fetus from radiological examination 

a.chest PA ---- < 0.01 mGy

b.abdomen or pelvis AP ---1 mGy

c.lumber spine (AP and lateral0---1.5 mGy

d.barium follow through ----2 mGy

e.barium enema ---8 mGy

343. Correctly matched approximate dose to fetus from radiological examination

a.CT chest --- 0.1 mGy

b.CT pelvis ---25 mGy

c.T_c-99_m bone scan--- 4 mGy

d. T_c-99_m thyroid scan --- 0.5 mGy

344.All true regarding cosmic radiation except

a.generated in space such as sun

b.made purely of a broad spectrum of X- and gamma rays

c.mostly attenuated by the atmoshphere

d.the amount is about 320 microSv/year at the sea level

e.the cosmic radiation increases with altitude

ANS-        342.        abcde

                343          abcde

                344          b   cosmic radiation is made of particulate matters and a                                                braod spectrum of X rays and gamma rays