Exam (elaborations)
RAD 105- Exam 1 (1)
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Exam of 9 pages for the course MKT 3413 at MKT 3413 (RAD 105- Exam 1 (1))
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RAD 105- Exam 1What are the 4 requirements for the production of x-rays? - ANS-1. A vacuum
2. A source of electrons
3. A target for the electrons
4. A high potential difference in voltage between the electron source and the target
What is attenuation? - ANS-The effect on the x-ray beam caused by the passing
through matter
What 2 types of processes combined make attenuation? - ANS-Absorption and scatter
radiation (anything that did not exit through the patient)
What is a longitudinal x-ray tube movement? - ANS-Movement along the long axis of
the table
What is a transverse x-ray tube movement? - ANS-Movement across the table at right
angles to longitudinal
What is a vertical x-ray tube movement? - ANS-Movement that is up and down with
increasing or decreasing distances between the tube and the table
What is a angle x-ray tube movement? - ANS-Movement that permits angulation of the
tube along the longitudinal axis and allows the tube to be aimed at the wall rather than
the table
What is a rotation x-ray tube movement? - ANS-Rotation that allows the entire tube
support to turn on its axis, changing the direction in which the tube arm is extended
What determines the length of exposure on the x-ray exposure? - ANS-The timer on the
control console that controls the duration of the x-ray's exposure
What determines the quantity of x-rays used for a given exposure? - ANS-The mAs
(mass and the product of milli-amperage and time) control on the control console
determines the quantity of radiation being produced
What determines the wavelength of the x-rays in a given x-ray beam? - ANS-The kVp
controls the kilovoltage on the control console, which controls the wavelength and
power of the x-ray beam
, What is the purpose of fluoroscopy? - ANS-To view radiographic images in motion in
real time
Who discovered x-rays? And what year was that discovery? - ANS-Roentgen; 1895
What is a Crookes tube? - ANS-Cathode ray tube that was the forerunner of the
fluorescent lamp and neon sign
What did Roentgen x-ray for the 1st x-ray? - ANS-His wife's hand
What is in the vacuum that is needed for x-ray production? - ANS-1. Cathode- where
electrons originate
2. Anode- always spinning so it forms heat evenly
Where does the source of electrons needed for x-ray production come from? - ANS-The
filament, which is the source of electrons
What houses the target that is needed for x-ray production? - ANS-Anode
What is energy converted to during an x-ray? What is the great majority converted into?
- ANS-Heat or x-rays; Heat
What is the potential difference that is needed for x-ray production? - ANS-Difference
between charge (Cathode - and Anode +)
What is wavelength? - ANS-Distance from crest to crest
What does ionizing mean? - ANS-Adding/removing electrons
What is frequency? - ANS-The number of times a crest will pass a unit of time
As wavelengths decrease, frequency... - ANS-Increases
As wavelengths decrease, energy... - ANS-Increases
As frequency increases, energy... - ANS-Increases
What is the primary beam? - ANS-Leaves x-ray before interferance; from the focal spot
the x-rays diverge into space forming a cone-shaped
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