HESI RADIOGRAPHY EXAM NEWEST 2024 ACTUAL EXAM COMPLETE 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
Who discovered x-rays? - (answer) Wilhelm Konrad Roentgen
What are 9 characteristics of x-rays? - (answer) 1. the ability to penetrate opaque substances
2. the ability to affect silver halide salts on films in the same manner as light does
3. the ability to stimulate or destroy tissue by ionization
4. they travel at a constant speed, the speed of light
5. they cause fluorescence
6. they are high energy waves
7. they travel as electromagnetic waves or energy
8. they have no mass
9. they travel in a straight line and are invisible
What is ionization? - (answer) The production of ions by the removal of electrons from the atoms of
the matter that is struck by the x-rays
When does ionization occur? - (answer) whenever x-rays penetrate matter
What is an electric current? - (answer) the flow of electrons from one point to another or through a
conductor
What is an electric current measured in? - (answer) amperes
What is a direct current? - (answer) current flowing in one direction, that is, from positive and
negative. Direct current can be interrupted at certain set intervals
What is kilovoltage usually designated as? - (answer) Kilovoltage peak (kVp)
What is kilovoltage? - (answer) the measure of the force between the negative cathode and the
positive anode and controls the energy of the electrons striking the tungsten target.
, HESI RADIOGRAPHY EXAM NEWEST 2024 ACTUAL EXAM COMPLETE 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
What does kilovoltage control? - (answer) the penetrating ability of the x-rays
What is milliamperage? - (answer) the measurement of the quantity or the number of electrons
passing from cathode to anode per second.
What does milliamperage have to do with the x-ray beams? - (answer) milliamperage only deals with
the strength of the x-ray beams
What is the maximum permissible dose for occupationally exposed persons? - (answer) 5 rems per
year (.1 in one week, 3 rem in any 13 week period)
What is the maximum permissible dose formula for occupationally exposed persons? - (answer)
MPD=5rem x (N-18)
What does the N stand for in the MPD formula? - (answer) The patients age
What does the MPD formula subtract 18 from a person's age? - (answer) because people 18 years or
younger are not supposed to work around x-rays
What is erythema? - (answer) a temporary reddening of the skin
What is an erythema dose? - (answer) the amount of radiation necessary to produce erythema
What is a lead diaphragm and what is it's purpose in the x-ray cone? - (answer) The lead diaphragm is a
metal disk 0.16 cm thick of lead with a hole in the center. It's purpose is to collimate or limit the size of
the beam of radiation.
What is primary radiation? - (answer) radiation coming directly from the target of the x-ray tube
DETAILED ANSWERS
Who discovered x-rays? - (answer) Wilhelm Konrad Roentgen
What are 9 characteristics of x-rays? - (answer) 1. the ability to penetrate opaque substances
2. the ability to affect silver halide salts on films in the same manner as light does
3. the ability to stimulate or destroy tissue by ionization
4. they travel at a constant speed, the speed of light
5. they cause fluorescence
6. they are high energy waves
7. they travel as electromagnetic waves or energy
8. they have no mass
9. they travel in a straight line and are invisible
What is ionization? - (answer) The production of ions by the removal of electrons from the atoms of
the matter that is struck by the x-rays
When does ionization occur? - (answer) whenever x-rays penetrate matter
What is an electric current? - (answer) the flow of electrons from one point to another or through a
conductor
What is an electric current measured in? - (answer) amperes
What is a direct current? - (answer) current flowing in one direction, that is, from positive and
negative. Direct current can be interrupted at certain set intervals
What is kilovoltage usually designated as? - (answer) Kilovoltage peak (kVp)
What is kilovoltage? - (answer) the measure of the force between the negative cathode and the
positive anode and controls the energy of the electrons striking the tungsten target.
, HESI RADIOGRAPHY EXAM NEWEST 2024 ACTUAL EXAM COMPLETE 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
What does kilovoltage control? - (answer) the penetrating ability of the x-rays
What is milliamperage? - (answer) the measurement of the quantity or the number of electrons
passing from cathode to anode per second.
What does milliamperage have to do with the x-ray beams? - (answer) milliamperage only deals with
the strength of the x-ray beams
What is the maximum permissible dose for occupationally exposed persons? - (answer) 5 rems per
year (.1 in one week, 3 rem in any 13 week period)
What is the maximum permissible dose formula for occupationally exposed persons? - (answer)
MPD=5rem x (N-18)
What does the N stand for in the MPD formula? - (answer) The patients age
What does the MPD formula subtract 18 from a person's age? - (answer) because people 18 years or
younger are not supposed to work around x-rays
What is erythema? - (answer) a temporary reddening of the skin
What is an erythema dose? - (answer) the amount of radiation necessary to produce erythema
What is a lead diaphragm and what is it's purpose in the x-ray cone? - (answer) The lead diaphragm is a
metal disk 0.16 cm thick of lead with a hole in the center. It's purpose is to collimate or limit the size of
the beam of radiation.
What is primary radiation? - (answer) radiation coming directly from the target of the x-ray tube
