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RADT 142 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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RADT 142 Exam 1 | Questions And Answers Latest {} A+ Graded | 100% Verified
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RADT 142 Exam 1 | Questions And Answers Latest {2024- 2025} A+ Graded | 100%Verified
What is radiation? - energy that is radiated or transmitted through space in the form of rays, waves, or
material away from the source.
Types of radiation - ionizing > ex. x-ray, gamma
nonionizing> ex. radio, light
What is X-rays? - x-rays are electromagnetic radiation with extremely short wavelengths. They can pass
through many materials.
Discovery x-rays - Nov 8th 1895 Wilhelm Roentgen.
-crooks tube
-Barium platinocyoinide
First radiographic - Anna Bertha Roentgen
- first picture of a hand
-30 min exposure
Properties of X-rays - Invisible, ionize atoms
polyenergetic, cause chemical and biological changes.
highly penetrating, travel in straight line until interrupt with an object.
produce scatter and secondary radiation
cannot be focused by lens.
Two types of examination - Radiography- internal form of the object
flouroscopy- show motions
, Flouroscope creation - 1898 by Thomas Edison
ARRT - Test and certify technologists
ASRT - Provide continuation education credits.
TJC - Accredited hospitals and medical facilities. The joint commission.
Computer tomography - Cat scans, obtain cross sectional images
Angiography - study of blood vessels and provide real-time imaging
Nuclear medicine - Use PET scan
Sonography (Ultrasound) - provide real time imaging and non ionized radiation
MRI - Obtain cross sectional images and non ionized radiation.
Velocity - m/s
Work - force exerted on an object times the distance moved in the direction of the force
w=force ×distance
Si unit=joule/second=watt
Force - a push or pull on an object
mass × acceleration
SI units newton
Power - the rate at which work is done
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