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Which one of the following techniques is safest for the detection of cancers?
A
Magnetic resonance imaging (MRI)
B
Radiography (X-ray)
C
Computed tomography (CT)
D
Histopathological studies
Detailed Solution
Radiography uses X-rays and computed tomography (CT) uses X-rays to generate a three-dimensional image of the internal organs; X-rays are ionising radiations and can themselves damage DNA.
Histopathological study (biopsy) requires a piece of the suspected tissue to be cut out, so it is an invasive technique.
MRI uses strong magnetic fields and non-ionising radiations to detect pathological and physiological changes in living tissue accurately.
Since MRI involves neither ionising radiation nor surgery, it is the safest of these.
Hence the safest technique is magnetic resonance imaging (MRI).
Histopathological study (biopsy) requires a piece of the suspected tissue to be cut out, so it is an invasive technique.
MRI uses strong magnetic fields and non-ionising radiations to detect pathological and physiological changes in living tissue accurately.
Since MRI involves neither ionising radiation nor surgery, it is the safest of these.
Hence the safest technique is magnetic resonance imaging (MRI).