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Sameer Jahabarali Physics
Unit 5, module 4 Medical physics



X-rays
X-rays are electromagnetic waves with wavelengths between 10-12m-10-9m. it shows
electromagnetic properties, therefore it can be diffracted, if grating id small enough, and
can take part in the photoelectric effect.

X-rays are produced in x-ray tube, which supplies a high…

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Sameer Jahabarali Physics
Unit 5, module 4 Medical physics



Uses of X-rays in internal body structures include:

2D X-rays- where an x-rays is exposed to a broken limb from a point source, to produce a sharp
image
Angiograms- two digitised X-ray images, with one image with a contrast medium are…

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Sameer Jahabarali Physics
Unit 5, module 4 Medical physics

Positron emission tomography (PET) detects abnormal metabolic or chemical activity. It uses medical
tracers such as radiolabeled glucose as it can be injected into the bloodstream and be taken up for
respiration in tissues. It works by:

Emitting a positron
Which…

Page 4

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Sameer Jahabarali Physics
Unit 5, module 4 Medical physics



Ultrasound
Ultrasound is a high frequency sound-wave, with a frequency beyond the human hearing ability. It can travel
across a medium in a longitudinal wave, this can be used in non-invasive medical imaging.

Piezoelectric effect is ability of some materials (crystals)…

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