ARRT Registry Exam review /Complete Comprehensive Study Guide – Expert
Strategies, Review of Key Quizzes, and Practice Questions for Guaranteed
Success(REAL DEAL)
Question 1
What is the correct term used to describe an intravenous injection of a concentrated volume of
contrast media?
A) Bolus
B) Infusion
C) Extravasation
D) Luminal
Correct Answer: A) Bolus
Rationale: A bolus injection is the rapid administration of a concentrated volume of a
substance, such as contrast media, into a blood vessel.
Question 2
Which of the following digital radiography methods utilizes a detector that captures x-ray
energy and converts it into an electronic signal without the use of a scintillator?
A) Indirect capture
B) CCD
C) Cassette-based radiography
D) Direct capture
Correct Answer: D) Direct capture
Rationale: Direct capture systems use a photoconductor (like amorphous selenium) to directly
convert x-ray photons into an electronic signal, eliminating the light conversion step.
Question 3
The energy of a characteristic x-ray photon created when an L-shell electron fills a K-shell
vacancy in a tungsten atom will have which of the following energies? (K-shell binding energy =
69.5 keV; L-shell binding energy = 12 keV)
A) 69.5 keV
B) 57.5 keV
C) 81.5 keV
,D) 12 keV
Correct Answer: B) 57.5 keV
Rationale: The energy of a characteristic photon is determined by the difference in binding
energies between the two electron shells involved. In this case, 69.5 keV (K-shell) minus 12
keV (L-shell) equals 57.5 keV.
Question 4
Identify the position that will place the positive contrast agent (barium) in the body of the
stomach and pylorus during a double-contrast upper GI exam.
A) Recumbent LPO
B) Supine
C) Recumbent RPO
D) Prone
Correct Answer: D) Prone
Rationale: In the prone position, gravity causes the heavy barium to pool in the more
anteriorly located body and pylorus of the stomach, while air moves to the fundus.
Question 5
Which position/projection will best demonstrate the broad aspect of the frontal air sinus?
A) PA axial (Caldwell method)
B) Parietoacanthial (Waters method)
C) Submentovertical (SMV)
D) Lateral
Correct Answer: A) PA axial (Caldwell method)
Rationale: The PA axial projection with a 15-degree caudal angle (Caldwell method) projects
the dense petrous ridges below the floor of the frontal sinuses, providing the best unobscured
view.
Question 6
Which position will best demonstrate the right axillary portion of the ribs?
A) AP
,B) PA
C) RPO
D) LPO
Correct Answer: C) RPO
Rationale: To demonstrate the axillary portion of the ribs, the affected side is positioned away
from the image receptor. Therefore, an RPO position will elongate and visualize the right
axillary ribs.
Question 7
Which position will emphasize the mucosal lining of the medial wall of the descending colon
during a double-contrast lower GI exam?
A) Right lateral decubitus
B) Prone
C) Supine
D) Left lateral decubitus
Correct Answer: D) Left lateral decubitus
Rationale: In a left lateral decubitus position, air rises to fill the lateral wall of the ascending
colon and the medial wall of the descending colon, providing an air-contrast view of the
mucosa.
Question 8
Which projection of the wrist will best demonstrate the interspaces of the carpal bones?
A) AP
B) PA
C) Lateral
D) Ulnar deviation
Correct Answer: A) AP
Rationale: The AP projection places the carpal bones closer to the image receptor and opens
the intercarpal spaces more effectively than the more common PA projection.
, Question 9
An image is acquired with computed radiography (CR) using which of the following methods?
A) A cassette that is electronically charged
B) Conventional film/screen processing
C) The use of a storage phosphor
D) A direct capture flat-panel detector
Correct Answer: C) The use of a storage phosphor
Rationale: CR technology uses a photostimulable storage phosphor (PSP) plate inside a
cassette to capture the latent image, which is then read by a laser in a separate reader.
Question 10
A transformer is constructed with 10,000 primary turns and 2,500 secondary turns. What will be
the output voltage if the input voltage is 210 volts?
A) 2,710 volts
B) 52.5 volts
C) 840 volts
D) 525 volts
Correct Answer: B) 52.5 volts
Rationale: This is a step-down transformer. Using the transformer law (Vs/Vp = Ns/Np), the
calculation is Vs = (Ns/Np) * Vp = (2,,000) * 210 = 0.25 * 210 = 52.5 volts.
Question 11
Which of the following circuit components is considered to be the source for kVp selection?
A) Step-up transformer
B) Autotransformer
C) Step-down transformer
D) Rectifier circuit
Correct Answer: B) Autotransformer
Rationale: The autotransformer operates on self-induction and is where the technologist
selects the kVp. It provides the initial voltage that is then sent to the step-up transformer.
Strategies, Review of Key Quizzes, and Practice Questions for Guaranteed
Success(REAL DEAL)
Question 1
What is the correct term used to describe an intravenous injection of a concentrated volume of
contrast media?
A) Bolus
B) Infusion
C) Extravasation
D) Luminal
Correct Answer: A) Bolus
Rationale: A bolus injection is the rapid administration of a concentrated volume of a
substance, such as contrast media, into a blood vessel.
Question 2
Which of the following digital radiography methods utilizes a detector that captures x-ray
energy and converts it into an electronic signal without the use of a scintillator?
A) Indirect capture
B) CCD
C) Cassette-based radiography
D) Direct capture
Correct Answer: D) Direct capture
Rationale: Direct capture systems use a photoconductor (like amorphous selenium) to directly
convert x-ray photons into an electronic signal, eliminating the light conversion step.
Question 3
The energy of a characteristic x-ray photon created when an L-shell electron fills a K-shell
vacancy in a tungsten atom will have which of the following energies? (K-shell binding energy =
69.5 keV; L-shell binding energy = 12 keV)
A) 69.5 keV
B) 57.5 keV
C) 81.5 keV
,D) 12 keV
Correct Answer: B) 57.5 keV
Rationale: The energy of a characteristic photon is determined by the difference in binding
energies between the two electron shells involved. In this case, 69.5 keV (K-shell) minus 12
keV (L-shell) equals 57.5 keV.
Question 4
Identify the position that will place the positive contrast agent (barium) in the body of the
stomach and pylorus during a double-contrast upper GI exam.
A) Recumbent LPO
B) Supine
C) Recumbent RPO
D) Prone
Correct Answer: D) Prone
Rationale: In the prone position, gravity causes the heavy barium to pool in the more
anteriorly located body and pylorus of the stomach, while air moves to the fundus.
Question 5
Which position/projection will best demonstrate the broad aspect of the frontal air sinus?
A) PA axial (Caldwell method)
B) Parietoacanthial (Waters method)
C) Submentovertical (SMV)
D) Lateral
Correct Answer: A) PA axial (Caldwell method)
Rationale: The PA axial projection with a 15-degree caudal angle (Caldwell method) projects
the dense petrous ridges below the floor of the frontal sinuses, providing the best unobscured
view.
Question 6
Which position will best demonstrate the right axillary portion of the ribs?
A) AP
,B) PA
C) RPO
D) LPO
Correct Answer: C) RPO
Rationale: To demonstrate the axillary portion of the ribs, the affected side is positioned away
from the image receptor. Therefore, an RPO position will elongate and visualize the right
axillary ribs.
Question 7
Which position will emphasize the mucosal lining of the medial wall of the descending colon
during a double-contrast lower GI exam?
A) Right lateral decubitus
B) Prone
C) Supine
D) Left lateral decubitus
Correct Answer: D) Left lateral decubitus
Rationale: In a left lateral decubitus position, air rises to fill the lateral wall of the ascending
colon and the medial wall of the descending colon, providing an air-contrast view of the
mucosa.
Question 8
Which projection of the wrist will best demonstrate the interspaces of the carpal bones?
A) AP
B) PA
C) Lateral
D) Ulnar deviation
Correct Answer: A) AP
Rationale: The AP projection places the carpal bones closer to the image receptor and opens
the intercarpal spaces more effectively than the more common PA projection.
, Question 9
An image is acquired with computed radiography (CR) using which of the following methods?
A) A cassette that is electronically charged
B) Conventional film/screen processing
C) The use of a storage phosphor
D) A direct capture flat-panel detector
Correct Answer: C) The use of a storage phosphor
Rationale: CR technology uses a photostimulable storage phosphor (PSP) plate inside a
cassette to capture the latent image, which is then read by a laser in a separate reader.
Question 10
A transformer is constructed with 10,000 primary turns and 2,500 secondary turns. What will be
the output voltage if the input voltage is 210 volts?
A) 2,710 volts
B) 52.5 volts
C) 840 volts
D) 525 volts
Correct Answer: B) 52.5 volts
Rationale: This is a step-down transformer. Using the transformer law (Vs/Vp = Ns/Np), the
calculation is Vs = (Ns/Np) * Vp = (2,,000) * 210 = 0.25 * 210 = 52.5 volts.
Question 11
Which of the following circuit components is considered to be the source for kVp selection?
A) Step-up transformer
B) Autotransformer
C) Step-down transformer
D) Rectifier circuit
Correct Answer: B) Autotransformer
Rationale: The autotransformer operates on self-induction and is where the technologist
selects the kVp. It provides the initial voltage that is then sent to the step-up transformer.
