Limited Radiology Exam (ALL COMBINED INFO)Questions And Answers 100% Pass.
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Course
Radiology
Institution
Radiology
Limited Radiology Exam (ALL COMBINED
INFO)Questions And Answers 100% Pass.
Nov. 8, 1895 by Wilhelm Roentgen at University of Wurzburg, Germany - AnswerWhen, who,
and where xrays were discovered
American Society of Radiologic Technologists (ASRT) - AnswerFounded in Chicago in 1920
continuing ed...
Limited Radiology Exam (ALL COMBINED
INFO)Questions And Answers 100% Pass.
Nov. 8, 1895 by Wilhelm Roentgen at University of Wurzburg, Germany - Answer✔When, who,
and where xrays were discovered
American Society of Radiologic Technologists (ASRT) - Answer✔Founded in Chicago in 1920
continuing education, professional journal, guidance for radiographic educators, and publishes a
CODE OF ETHICS
American Registry of Radiologic Technologists (ARRT) - Answer✔establish standards and
examinations to certify RTs
published Rules of Ethics
Joint Review Committee on Education in Radiologic Technology (JRCERT) - Answer✔National
organization that formally accredits schools of rad tech. Formed in 1969. Also accredits limited
radiographer programs
Reciprocity - Answer✔The credential that is issued in one state is upheld in another
Practicing outside your credentials may result in - Answer✔fines, imprisonment, or both
The # of states that utilize ARRT limited scope exam for state licensing - Answer✔35
xray tube - Answer✔source of xrays
tube housing - Answer✔lead-lined casing that envelops the xray tube
tube port - Answer✔the hole where the xrays exit from the xray tube
primary radiation - Answer✔the xrays that leave the tube
radiation field - Answer✔the squared area of the xray beam that strikes the patient and x ray
table
central ray - Answer✔imaginary line that is in the center of the xray beam
image receptor - Answer✔the device that catches the xrays after they have passed through the pt
tissue density - Answer✔bone will absorb more radiation than less dense tissue, like muscle
remnant radiation - Answer✔the radiation that passes thru the pt and hits the IR creating a latent
image on the IR before it is processed
visible image - Answer✔what you get when you process a latent image on an IR
attenuation - Answer✔absorbtion of the xray beam into matter
scatter - Answer✔the patient is the primary source of scatter
scatter radiation - Answer✔has less energy than the primary x ray beam but is not as easily
controlled
scatter radiation fog - Answer✔unwanted image exposure caused by scatter radiation
Most frequent adverse event during an xray - Answer✔patient falling
How body parts are measured to determine correct exposure factors - Answer✔with a caliper, in
cm
below 85 kvp, an adjustment of 2 kvp/cm will compensate for small changes in what/ -
Answer✔Size of the body part
Above 85 kvp, a change of 3 kvp/cm is necessary depending on.... - Answer✔size of the body
part
Best factor to change when compensating for part size - Answer✔mAs
How much to increase mAs for a 2 cm increase in part size - Answer✔30%
how much to decrease mAs for a 2 cm decrease in part size - Answer✔20%
Alteration of Contrast with kilovoltage - Answer✔the 15% rule
When the kvp is increased - Answer✔lengthens the scale of contrast, "less contrast"
when the kvp is decreased - Answer✔shortens the scale of contrast, "more contrast"
Using the 15% rule to increase contrast - Answer✔Decrease kvp by 15% and multiply mAs by
2(double it)
Using the 15% rule to decrease contrast - Answer✔Increase the kvp by 15% and divide the mAs
by 2 (half it)
What composes an atom - Answer✔Proton, neutron, and electron
Nucleus is made up of... - Answer✔protons and neutrons
The electrons circle the nucleus in... - Answer✔shells
Protons have what kind of charge - Answer✔Positive
Electrons have what kind of charge - Answer✔negative
The K shell is ____________ the nucleus - Answer✔nearest
Most important electron shell in radiography - Answer✔K shell
Electrons are held in place by a ____________ _______. - Answer✔binding energy
Calcium = - Answer✔Ca
Lead = - Answer✔Pb
The greater the atomic number the greater the element's _____ and ________. - Answer✔Mass
and density
A very important element used in the production of xrays - Answer✔Tungsten
Tungsten symbol - Answer✔W
Atomic number of tungsten - Answer✔74
ionization - Answer✔produces an atom with an electric charge
xrays cause _____________ in the human body - Answer✔ionization
The kind of energy most important in radiology - Answer✔electromagnetic energy
the distance between the crest and the trough of the wave (its height) - Answer✔amplitude
the distance from the crest of one wave to the crest of the next wave - Answer✔wavelength
number of times per second that a wave passes a given point - Answer✔frequency
the speed of electromagnetic energy - Answer✔186,000 miles per second
the shorter the wave length, the ________ the frequency - Answer✔higher
velocity - Answer✔wavelength x frequency
xrays with shorter wavelength - Answer✔higher energy, higher frequency, and are more
penetrating
Rays that are more penetrating than xrays - Answer✔Therapeutic x rays
gamma rays
Rays that are longer, or less penetrating than xrays - Answer✔UV rays
light rays
radio waves
photon - Answer✔smallest possible unit of electromagnetic energy
Characteristics of xrays - Answer✔have no mass
electrically neutral
polyenergetic and heterogenous
travel in straight lines at the speed of light
can ionize matter
can produce biologic changes in tissue
produce secondary and scatter radiation
resistance - Answer✔ohms
current - Answer✔quantity of electrons flowing in a circuit
Ampere - Answer✔unit used to measure rate, volume, or current flow in the circuit
Potential difference - Answer✔speed of the electron flow in the current
Volt - Answer✔unit used to measure potential difference
Voltage in a normal house outlet - Answer✔120 V
An xray tube operates at this range of voltage - Answer✔40,000 to 125,000
mA - Answer✔1/1000 of an ampere
kilovolt - Answer✔1000 volts
Four essential things for production of xrays - Answer✔1) A vacuum
2) A source of electrons
3) A target
4) A high potential difference
The filament is made up of __________ and is located on the __________ side of the tube. -
Answer✔Tungsten ; cathode
Most energy (99%), when creating an xray, is wasted, and turns into _____. - Answer✔Heat
2 types of radiation - Answer✔Bremstrahling
Characteristic
Bremsstrahlung radiation - Answer✔The electron "brakes" changes course, and creates an xray
photon
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