Maryland CT Technologist Certification
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. Which imaging modality principle is fundamental to computed
tomography (CT) technology?
A. Sound wave reflection
B. Magnetic resonance of hydrogen nuclei
C. Positron emission detection
D. X-ray attenuation measured from multiple angles
Rationale: CT imaging is based on the measurement of X-ray attenuation
through tissues from multiple projections, allowing reconstruction of cross-
sectional images.
2. Which tissue typically demonstrates the highest attenuation value on a
CT scan?
A. Fat
B. Air
C. Water
D. Cortical bone
,Rationale: Cortical bone has the highest density among common body
tissues and therefore exhibits the greatest attenuation of X-rays on CT
images.
3. Hounsfield Units (HU) are used primarily to measure:
A. Radiation exposure time
B. Patient body mass index
C. Magnetic field strength
D. Tissue attenuation values
Rationale: Hounsfield Units quantify tissue density relative to water and
are essential for CT image interpretation.
4. What Hounsfield Unit value is assigned to water?
A. -1000
B. -500
C. 0
D. +1000
Rationale: Water serves as the reference standard in CT imaging and is
assigned a value of 0 HU.
5. Which structure normally has a CT number closest to -1000 HU?
A. Bone
B. Muscle
C. Fat
D. Air
Rationale: Air has extremely low density and is assigned approximately -
1000 HU on the Hounsfield scale.
6. The primary purpose of CT collimation is to:
, A. Increase patient movement
B. Reduce monitor brightness
C. Eliminate image reconstruction
D. Control X-ray beam width and slice thickness
Rationale: Collimation restricts the X-ray beam, helping determine slice
thickness and reducing unnecessary radiation exposure.
7. Which CT artifact is commonly caused by metallic implants?
A. Motion artifact
B. Partial volume artifact
C. Ring artifact
D. Beam hardening artifact
Rationale: Dense metallic objects preferentially absorb low-energy
photons, producing beam hardening streak artifacts.
8. In CT imaging, pitch refers to:
A. Detector temperature
B. Gantry weight
C. Contrast concentration
D. Table movement per rotation relative to beam width
Rationale: Pitch is the ratio of table travel during one rotation to the total
beam collimation width.
9. Increasing pitch generally results in:
A. Higher radiation dose
B. Longer scan time
C. Improved contrast resolution only
D. Lower radiation dose and faster scanning
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. Which imaging modality principle is fundamental to computed
tomography (CT) technology?
A. Sound wave reflection
B. Magnetic resonance of hydrogen nuclei
C. Positron emission detection
D. X-ray attenuation measured from multiple angles
Rationale: CT imaging is based on the measurement of X-ray attenuation
through tissues from multiple projections, allowing reconstruction of cross-
sectional images.
2. Which tissue typically demonstrates the highest attenuation value on a
CT scan?
A. Fat
B. Air
C. Water
D. Cortical bone
,Rationale: Cortical bone has the highest density among common body
tissues and therefore exhibits the greatest attenuation of X-rays on CT
images.
3. Hounsfield Units (HU) are used primarily to measure:
A. Radiation exposure time
B. Patient body mass index
C. Magnetic field strength
D. Tissue attenuation values
Rationale: Hounsfield Units quantify tissue density relative to water and
are essential for CT image interpretation.
4. What Hounsfield Unit value is assigned to water?
A. -1000
B. -500
C. 0
D. +1000
Rationale: Water serves as the reference standard in CT imaging and is
assigned a value of 0 HU.
5. Which structure normally has a CT number closest to -1000 HU?
A. Bone
B. Muscle
C. Fat
D. Air
Rationale: Air has extremely low density and is assigned approximately -
1000 HU on the Hounsfield scale.
6. The primary purpose of CT collimation is to:
, A. Increase patient movement
B. Reduce monitor brightness
C. Eliminate image reconstruction
D. Control X-ray beam width and slice thickness
Rationale: Collimation restricts the X-ray beam, helping determine slice
thickness and reducing unnecessary radiation exposure.
7. Which CT artifact is commonly caused by metallic implants?
A. Motion artifact
B. Partial volume artifact
C. Ring artifact
D. Beam hardening artifact
Rationale: Dense metallic objects preferentially absorb low-energy
photons, producing beam hardening streak artifacts.
8. In CT imaging, pitch refers to:
A. Detector temperature
B. Gantry weight
C. Contrast concentration
D. Table movement per rotation relative to beam width
Rationale: Pitch is the ratio of table travel during one rotation to the total
beam collimation width.
9. Increasing pitch generally results in:
A. Higher radiation dose
B. Longer scan time
C. Improved contrast resolution only
D. Lower radiation dose and faster scanning
