COMPUTED TOMOGRAPHY EXAM
PREP 2025/2026 QUESTIONS AND
ANSWERS 100% PASS
Which of the following reduces the scatter radiation reaching the detectors?
A. Post-patient collimation
B. Pre-patient collimation
C. Pre-detector collimation
D. Both A & C - ANS D. Both A & C
Which of the following is the primary interaction between x-ray photons and tissue during
computed tomography?
A. Bremsstrahlung
B. Characteristic
C. Compton effect
D. Coherent scatter - ANS C
The process by which electrons are produced at the cathode of a CT x-ray tube is known as:
A. rectification
B. anode heel effect
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, C. thermionic emission
D. isotropic emission - ANS C
The assignment of different generations to CT scanners is based on the configuration of the:
A. patient and gantry
B. tube and detectors
C. anode and cathode
D. tube and collimators - ANS B
When one is using a third-generation CT scanner, it is important that reference detectors
positioned at the peripheral portions of the detector array be exposed to:
A. homogeneous radiation
B. unattenuated radiation
C. monochromatic radiation
D. remnant radiation - ANS D
In 1979, the scientists __________ and __________ shared the Nobel Prize for their research in
computed tomography
A. Watson and Crick
B. Olendorf and Hounsfield
C. Hounsfield and Cormack
D. Hounsfield and Ambrose - ANS C
The type of compensating filter used at the x-ray tube of a CT scanner is called a:
A. kernel
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
PREP 2025/2026 QUESTIONS AND
ANSWERS 100% PASS
Which of the following reduces the scatter radiation reaching the detectors?
A. Post-patient collimation
B. Pre-patient collimation
C. Pre-detector collimation
D. Both A & C - ANS D. Both A & C
Which of the following is the primary interaction between x-ray photons and tissue during
computed tomography?
A. Bremsstrahlung
B. Characteristic
C. Compton effect
D. Coherent scatter - ANS C
The process by which electrons are produced at the cathode of a CT x-ray tube is known as:
A. rectification
B. anode heel effect
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, C. thermionic emission
D. isotropic emission - ANS C
The assignment of different generations to CT scanners is based on the configuration of the:
A. patient and gantry
B. tube and detectors
C. anode and cathode
D. tube and collimators - ANS B
When one is using a third-generation CT scanner, it is important that reference detectors
positioned at the peripheral portions of the detector array be exposed to:
A. homogeneous radiation
B. unattenuated radiation
C. monochromatic radiation
D. remnant radiation - ANS D
In 1979, the scientists __________ and __________ shared the Nobel Prize for their research in
computed tomography
A. Watson and Crick
B. Olendorf and Hounsfield
C. Hounsfield and Cormack
D. Hounsfield and Ambrose - ANS C
The type of compensating filter used at the x-ray tube of a CT scanner is called a:
A. kernel
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
