COMPLETE ANSWERS 100 CORRECT LATEST

ARRT LMRT EXAM

COMPLETE ANSWERS 100% CORRECT (LATEST 2024 / 2025 )

1. Most X-ray tubes in use today have high speed rotation at: 10,000 rpm

2. The is used to rotate the anode: Electromagnetic induction motor

• The process of changing Alternating Current (AC) into Direct Current (DC): Rectification

4. Above 70 kVp, about 15% of the beam is?: Characteristic

5. The German word that means braking and slowing?: Bremsstrahlung

• Every x-ray exposure will contain photons produced from bremsstrahlung interactions

Below 70 kVp, about what percentage is the beam is brems?: 100%

• Every x-ray exposure will contain photons produced from bremsstrahlung interactions

Above 70 kVp, about what percentage is the beam is brems?: 85%

• For Characteristic radiation to be created Above 70 kVp, about what per- centage of the

beam is characteristic?: 15%

• Created when an incoming electron interacts with the k-shell electron and knocks it out of

its orbit. When the electron void is filled with an outer shell electron an x-ray photon is created

this is?: Characteristic radiation

10. What is unsharpness? (Geometric blur or focal spot blur): Penumbra

• Chicago 1920 worlds largest and oldest professional radiation organiza- tion: ASRT

12. formed in 1922 establish standards and examinations: ARRT

13. Formed in 1969 national organization that conducts accreditation: JRCERT

14. The radiation that leaves the tube is?: Primary radiation

15. The x-ray beam that exits on the opposite side of the patient is called?: -

Remnant radiation or exit radiation

16. A "unseen image" is called?: Latent image

• The absorption of an x-ray beam is called?

(the patient is the primary source of scatter): Attenuation 1 / 2

• Occurs at energy levels throughout the diagnostic xray range of 40 to 125 kVp: Compton

scatter

• Occurs when an xray photon collides with an inner shell orbital electron of an atom. the

photons energy is absorbed into the process of rejecting the electron: Photoelectric Effect

20. Medical term for throwing up: Emesis

21. Another term for heart attack?: myocardial infarction (MI)

22. Medical term for nosebleed: epistaxis

• Disease transmission

it is any medium that transports micro organisms examples include contami- nated food water

drugs and blood: Vehicle

• Disease transmission

it is spread by dust containing either Endospores or droplet nuclei: Airborne contamination

• Disease transmission

an object that has been in contact with pathogenic organisms called examples it is commonly

on xray table, up right Bucky, etc.: Fomites

• Disease transmission

an arthropod examples insect, spider, or similar form. mosquitoes, fleas: Vec- tors

• Roentgen

discovered x-rays while working with a tube?: Crookes

• An "electron cloud" surrounding the filament of the cathode is referred to as a: Space

charge

29. Free electrons of X-ray production come from the: Filament

• The creation of the space charge in the X-ray tube produces:: thermionic emission
• The majority of photons in the X-ray beam are created by which process?-

: Bremsstrahlung interactions

• More than 99% of the energy of the electron stream is converted into:: heat
• the high-speed rotation (10,000 rpm) of the anode enables: Greater dissipa- tion of heat

from high technical factors

• The degree of angulation of the x-ray tube target will determine the:: size of the actual

and effective focal spot

35. A dual-focus X-ray tube has:

• / 2