RADT 142 Exam 1 Questions with Correct Answers
Radiation Protection - Answer-Shielding, filtration, time, distance, collocation, and gonadal.
Law of conversation of energy - Answer-energy cannot be create nor destroy but can be transformed from one to another
Heat random disorder of molecu...
First radiographic - Answer-Anna Bertha Roentgen
- first picture of a hand
, -30 min exposure
Properties of X-rays - Answer-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 - Answer-Radiography- internal form of the object
flouroscopy- show motions
Flouroscope creation - Answer-1898 by Thomas Edison
Angiography - Answer-study of blood vessels and provide real-time imaging
Nuclear medicine - Answer-Use PET scan
Sonography (Ultrasound) - Answer-provide real time imaging and non ionized radiation
MRI - Answer-Obtain cross sectional images and non ionized radiation.
Velocity - Answer-m/s
Work - Answer-force exerted on an object times the distance moved in the direction of
the force
w=force ×distance
Si unit=joule/second=watt
Force - Answer-a push or pull on an object
mass × acceleration
SI units newton
Power - Answer-the rate at which work is done
Power=work/time
Si unit=joule/second=watt
mammography - Answer-a radiographic examination of the breasts to detect the
presence of tumors or precancerous cells
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