Q2. (a) Having an X-ray taken increases your exposure to radiation The table gives:
the radiation doses received for 6 different medical X-rays;
the number of days' of exposure to natural background radiation each dose is
equivalent to
Medical X-ray
Radiation dose
received
in arbitrary units)
2
Equivalent number of days
of exposure to natural
background radiation
Chest
24
Skull
7
8.4
Pelvis
22
26.4
Hip
528
140
Spine
CT head scan
200
240
A hospital patient has an X-ray of the spine taken
Calculate the number of days of exposure to natural background radiation that an
X-ray of the spine is equivalent to
Show how you work out your answer.

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