This is the first assignment for unit 21- Explore the principles, production, usesand benefits of non-ionising instrumentation techniques
in medical applications. This assignment covers both learning AIMS A AND B. This assignment has been awarded a distinction grade and covers all key aspects from...
21.A.B. Radiation use in medical diagnosis and treatment.
P1:
Non ionising radiation:
Describes the energy waves which are composed of electric and magnetic fields which oscillate and
travel at the same speed of light. Non ionising radiation will not affect the human body because the
radiation does not go through to affect the structure of the atoms. It is used in magnetic resonance
imaging (MRI), ultrasound and optical imaging.
Magnetic resonance imaging (MRI):
Within the human body there are a lot of hydrogen
molecules and several tissues that contain different
amount of hydrogen inside their nuclei. A single
hydrogen atom has one proton which is positively
charged within its nucleus. The proton can act as a
magnet which can be attracted within a magnetic
field.
An MRI scanner consists of a large and heavy piece
of equipment which uses computer systems that
show data which is up to date constantly.
Analogictips.com. 2022. [image] Available at:
The scanner has a large magnet which is very heavy, this https://www.analogictips.com/wp-content/upl
magnet polarises the nuclei within hydrogen atoms in the oads/2019/03/WHTH_FAQ_MRI_Pt1_Fig4.png
body by providing electromagnets. An MRI scanner will [Accessed 10 May 2022].
use strong magnetic fields and radio waves when
interfering in the human body.
It is used in examining most parts of the body and mainly the central nervous system. The process
which is used in MRI scanning is nuclear magnetic resonance process. This process helps producing
detailed pictures of tissues because the protons can be identified in their specific locations. This
process can also show information by sending a signal about what type the tissue is depending on
the proton’s speed to re-align.
Benefits:
Non invasive
The patient is not in contact with the equipment
Painless procedure
Good contrast and detailed images of tissues
When tissues interfere with another is clearly visible and defined.
Infrared thermography (IRT):
IRT is a method used to detect radiant thermal energy in the form of heat/infrared wavelength from
the body which then gets converted into a temperature reading which is after displayed into an
image.
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