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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...

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  • October 18, 2024
  • 104
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • radt all final exams 2024
  • rapid antigen detection tests
  • radt all final exams 2024 questions

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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 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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