RADT All Final Exams 2024 Questions With Correct Answers| 100% Accurate| +A Grade
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RADT All Final Exams 2024 Questions With Correct Answers| 100% Accurate| +A Grade
Coulomb per Kilogram SI unit
Roentgen (R) conventional
Gray (SI unit) SI unit
Rad conventional
Seivert SI unit
Rem conventional
Bequerel SI unit
Curie conventional
If a patient receives a tota...
RADT All Final Exams 2024 Questions With
Correct Answers| 100% Accurate| +A Grade
Coulomb per Kilogram SI unit
Roentgen (R) conventional
Gray (SI unit) SI unit
Rad conventional
Seivert SI unit
Rem conventional
Bequerel SI unit
Curie conventional
If a patient receives a total dose of 9500 rads, the dose may be recorded as ___________ if the SI
system is used.
95Gy
Effective dose (EfD) can be expressed in the following units.
1. Sv
2. mSv
3. Rad
1 and 2
,Which of the following is essentially the sum total of air kerma over the exposed area of the
patient's body surface?
dose area product
Convert 28 rad to the SI unit.
0.28 Gy 28 x 0.01 = 0.28
The volume of tissue irradiated is determined by
- the area of collimation
- patient/part thickness
- field size
- all of the above
all of the above
The probability of a Compton interaction occurring depends on
the energy of the incoming x-ray photon
As compared with lower kVp exposures, using high kVp will result in a scattered photon that is of
_____ energy.
higher
Which of the following produces the greatest amount of scatter radiation exiting the patient?
high kVp and large field size
Restriction of the primary beam to the anatomy of interest
1. reduces patient exposure
,2. is a major cause of repeated images
3. reduces the amount of scatter produced
1 and 3
To compensate for some of the loss of recorded detail due to the large OID used with the air gap
technique, the _____ should be increased as well.
SID
For a lateral lumbar spine, placing a lead shield on the table behind the area of exposure
reduces the scatter reaching the IR
Anyone in the room during an exposure must wear a lead apron to absorb the scatter radiation
produced in the
patient
(T/F) Scatter radiation is of no value in radiographic imaging.
TRUE
(T/F) Beam restricting devices are located just above the tube housing.
FALSE
(T/F) When using automatic collimation, collimating to the anatomy of interest is an unnecessary
waste of time; the beam is already collimated.
FALSE
,(T/F) Focused grids allow more transmitted photons to reach the IR than parallel grids.
TRUE
If a tabletop exposure (no grid) of a humerus requires 2.5 mAs, how much mAs is needed if a 12:1
ratio grid is added?
12.5
2.5 mAs(1) / x = 1/5
If 24 mAs and a 6:1 grid results in an excellent radiograph, how much mAs is needed with a 5:1 grid?
16
24 mAs/x = 3/2
Absorption of transmitted photons by a grid caused by misalignment is
grid cutoff
A focused grid's lead strips are angled to match
the angle of the x-rays in the primary beam
The relationship between the height of the lead strips and the distance between them is the grid
ratio
,Camera Tube
A
Accelerating anode
B
Image intensifier
C
, Output phosphor
D
Electrostatic focusing lenses
E
Photocathode
F
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