Pages in this set

Page 1

Preview of page 1

· Describe the use of X-rays in imaging internal body structures

X-rays belong to the short-wavelength, high frequency end of the electromagnetic
spectrum. They have wavelengths in the range of 10-8m to 10-13m. They are produced when
fast-moving electrons are rapidly decelerated; their kinetic energy is transformed to photons…

Page 2

Preview of page 2
Contrast media are used to distinguish between different soft tissues that absorb X-rays
equally and would otherwise show up the same on an image. They are elements with high
values of the atomic number; they have a high number of electrons in their atoms which
interact with the x-rays resulting…

Page 3

Preview of page 3
Computerised axial tomography consists of an X-ray tube which rotates round a patient
whilst the detectors remain stationary. The CAT scanner is operated when the patient lies in
a vertical ring of X-ray detectors. The x-ray tube rotates around the ring which exposes the
patient to a beam of X-rays…


No comments have yet been made

Similar Physics resources:

See all Physics resources »