Unit 1 (History, Atoms, and PrineFactors) Factors Prime
Q: What was Wilhelm Conrad Roentgen studying when he accidentally discovered x-rays?
A: Cathode rays
Q: What body part did Wilhelm Conrad Roentgen x-ray on his wife?
A: Hand
Q: What year were x-rays discovered by Wilhelm Roentgen?
A: 1895
Q: Who invented the fluoroscope?
A: Thomas Edison
Atomic Structure & Basic Physics
Q: Which of the following is NOT located in the nucleus of an atom?
A: Electrons
Q: What is the smallest unit of an element?
A: Atom
Q: The acquisition or loss of an electron by an atom is called what?
A: Ionization
Q: Electrons give what type of charge?
A: Negative
Q: Which statement about electrons is true?
A: They orbit the nucleus
Q: What is made up of protons and neutrons?
A: Nucleus
Q: Do electrons have a large amount of mass or weight?
A: False
Q: Electrons have what type of charge?
A: Negative charge
Q: Protons have what type of charge?
A: Positive charge
Radiography Materials & Systems
Q: All of the following are elements commonly used in radiography EXCEPT which one?
A: Mercury
Q: What does PACS stand for?
A: Picture archiving and communication system
Q: True or False: ALARA (as low as reasonably achievable) is used in radiography to help keep patients and healthcare workers safe.
A: True
Exposure Factors & Technique
Q: Which exposure factor determines the total quantity of x-rays produced during an exposure?
A: mAs
Q: The effect of mA on receptor exposure is:
A: Directly proportional
Q: Which factor controls the quality (penetrating ability) of the x-ray beam?
A: kVp
Q: Which prime factor controls the number (quantity) of photons reaching the image receptor?
A: mAs
mAs Calculations
Q: Calculate the mAs: 600 mA at 0.02 sec
A: 12 mAs
Q: Calculate the mAs: 500 mA at 0.4 sec
A: 200 mAs
Q: If the mA is 200 and the time is 0.15 sec, what is the mAs?
A: 30 mAs
Q: Calculate the mAs: 300 mA at 0.05 sec
A: 15 mAs
Q: Calculate the mAs: 300 mA at 1/3 sec
A: 100 mAs
Q: 200 mA at what time equals 5 mAs?
A: 0.025 sec
Q: Calculate the mA: ____ mA at 0.05 sec = 20 mAs
A: 400 mA
Q: Calculate the mAs: 400 mA at 0.02 sec
A: 8 mAs
Q: Calculate the mAs: 400 mA at 0.025 sec
A: 10 mAs
Additional Concepts
Q: Which of the following describes electrons?
A: They orbit the nucleus
Q: Which exposure factor determines image quantity?
A: mAs
Q: Which of the following is true regarding electrons?
A: Electrons orbit the nucleus