ARRT REGISTRY EXAM LATEST UPDATE 2023-2024 LATEST 200 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRADE

ARRT REGISTRY EXAM LATEST UPDATE 2023-2024

LATEST 200 REAL EXAM QUESTIONS AND

CORRECT ANSWERS (VERIFIED

ANSWERS)|AGRADE

Which position of the shoulder demonstrates the lesser tubercle in

profile medially? - ANSWER- Internal rotation

In which position of the shoulder is the greater tubercle seen

superimposed on the humeral head? - ANSWER- Internal rotation

Which carpals are best demonstrated by ulnar deviation/flexion? -

ANSWER- Lateral carpals, scaphoid

The long. flat structures that project posteromedially from the pedicles

are the - - ANSWER- Laminae

- ANSWERWhere do the electrons that travel across the tube come from? -

ANSWER- Thermionic Emission

How are the electrons accelerated across the tube? - ANSWER- High

Voltage

In what direction do electrons flow across the tube? - ANSWERCathode to Anode (Spinning)

How are electrons focused in the tube? - ANSWER- With focusing Cups

What happens when electrons are decelerated? - ANSWER- They give

off Photons

How are electrons slowed down in the tube prior to emission of

photons? - ANSWER- The curve a tungsten nucleus. Bremsstrahlung

Interactions

What does Frequency determine in xray photons? - ANSWER- Energy

What are two early somatic effects of ionizing radiation? What is the

dose required for this? - ANSWER- 2 Sv

redness

hair loss

What are some late somatic effects of ionizing radiation exposure? What

dosage does occur at? - ANSWER- 5 Sv

cancer

cataracts

What is the difference between threshold and non-threshold? -

ANSWER- Threshold equals specific dose

non-threshold equals chance

What is relative biologic effectiveness? - ANSWER- The relative

capability of radiation with different LEDs to produce a particular

biologic reaction

Describe cell radiosensitivity - ANSWER- Doses of ionizing radiation

produce different degrees of damage in different kinds of human cells.

The more mature and specialized the less sensitive it is to radiation.

High reproductive rate equals highly sensitive to radiation

What is the LD 50/30 for adult humans? - ANSWER- Is the dose where

which 50% of the population dies after 30 days of exposure to high

amounts of ionizing radiation. 3 Sv

What is oxygen enhancement ratio? - ANSWER- It describes the effect

where in oxygen-rich environments, radiation does more damage.

High linear energy transfer particles have an OER of one

low linear energy transfer particles have an OER of three (radiation dose

has to be three times higher to do the same damage without oxygen)

Early somatic effects - ANSWER- Erythema 2 Sv

epilation 5 Sv

Late somatic effects - ANSWER- Carcinogenesis

cataractoGenesis

Acute effects of radiation - ANSWER- Erythema

epilation

desquamation

Chronic effects of radiation - ANSWER- Effects that appear within

minutes hours days weeks after high-dose exposure.

Basically nonstochastic somatic effects.

What are somatic effects? - ANSWER- They are the effects that you can

see

What are the four ARS response stages? - ANSWER- Prodromal

latent

manifest

recovery or death

Carcinogenesis - ANSWER- Occurs randomly when the body is

introduced to radiation.

Stochastic

Hematopoietic syndrome - ANSWER- 0. 25 to 1 grays

erythrocyte

lymphocyte

leukocyte

thrombocytes