MARYLAND RADIOLOGIC
TECHNOLOGIST CERTIFICATION
EXAM 1 PRACTICE EXAM LATEST
UPDATED FINAL EXAM WIT
TABLE OF CONTENTS
Section Topic Questions
I Radiation Physics & Fundamentals 1-12
II Radiation Protection & Safety 13-22
III Image Production & Technical Factors 23-40
IV Image Quality & Digital Imaging 41-50
V Positioning & Procedures 51-62
VI Anatomy & Pathology 63-70
VII Patient Care & Medical Emergencies 71-80
VIII Contrast Media & Pharmacology 81-85
,Section Topic Questions
IX Equipment Operation & Quality Assurance 86-92
X Radiobiology & Biological Effects 93-100
SECTION I: RADIATION PHYSICS & FUNDAMENTALS
(Questions 1-12)
1. What is the primary purpose of diagnostic radiography?
A. To treat cancer
B. To produce diagnostic images of internal structures
C. To destroy tumor cells
D. To measure blood pressure
Correct Answer: B
Rationale: Radiography uses X-rays to visualize internal anatomy for diagnosis. X-rays
pass through the body and are detected by an image receptor, creating images that
help healthcare providers identify fractures, infections, tumors, and other conditions.
Treatment of cancer (A) is typically associated with radiation therapy, not diagnostic
radiography. Destroying tumor cells (C) is also a therapeutic application, not diagnostic
imaging. Measuring blood pressure (D) is unrelated to radiography and is performed
using a sphygmomanometer .
2. Which of the following is a form of ionizing radiation?
A. Ultrasound
B. MRI
C. X-rays
D. Infrared
,Correct Answer: C
Rationale: X-rays have enough energy to ionize atoms by removing electrons from their
orbits. This ionization capability allows X-rays to penetrate tissues and create diagnostic
images but also poses biological risks that require radiation protection measures.
Ultrasound (A) uses sound waves and is non-ionizing. MRI (B) uses magnetic fields and
radiofrequency pulses, also non-ionizing. Infrared (D) is part of the electromagnetic
spectrum with lower energy, used for thermal imaging, and does not cause ionization .
3. The unit of absorbed radiation dose is:
A. Curie
B. Gray
C. Roentgen
D. Tesla
Correct Answer: B
Rationale: The Gray (Gy) is the SI unit of absorbed dose, measuring the energy
deposited by ionizing radiation per unit mass of tissue. One Gray equals one joule per
kilogram. The Curie (A) is a unit of radioactivity (disintegrations per second), not
absorbed dose. The Roentgen (C) is an older unit of exposure in air, measuring
ionization in air rather than absorbed energy in tissue. Tesla (D) is the unit of magnetic
field strength, used in MRI physics .
4. Which organ is most sensitive to radiation exposure?
A. Bone
B. Muscle
C. Reproductive organs
D. Skin
Correct Answer: C
Rationale: Gonadal (reproductive) tissue is highly radiosensitive due to its rapid cell
division and differentiation. Radiation exposure to the gonads is of particular concern
because it can cause genetic (hereditary) effects in future generations. The Law of
Bergonié and Tribondeau states that cells are more radiosensitive when they divide
, rapidly, are undifferentiated, and have a long future mitotic history. Reproductive cells
meet all these criteria .
5. What does ALARA stand for?
A. As Low As Reasonably Achievable
B. Always Limit Average Radiation Amount
C. Acute Level of Radiation Assessment
D. Applied Light Absorption Radiation Analysis
Correct Answer: A
Rationale: ALARA is a fundamental radiation safety principle that requires minimizing
radiation exposure to patients, personnel, and the public. This principle guides all
radiologic procedures, emphasizing that any radiation exposure should be kept as low
as reasonably achievable while still obtaining the necessary diagnostic information. The
concept applies to time, distance, and shielding—the three primary methods of
radiation protection. Incorrect options B, C, and D are not valid acronyms in radiologic
science .
6. The interaction between X-rays and matter that produces scatter radiation is:
A. Photoelectric effect
B. Compton scatter
C. Pair production
D. Coherent scattering
Correct Answer: B
Rationale: Compton scatter occurs when an incoming X-ray photon interacts with an
outer-shell electron, causing the photon to lose energy and change direction. This
scattered radiation degrades image quality by creating fog and increases occupational
exposure risk to personnel. The photoelectric effect (A) involves complete absorption of
the photon and contributes to image contrast. Pair production (C) requires extremely
high energy (1.02 MeV) and does not occur in diagnostic X-ray ranges. Coherent
scattering (D) results in minimal energy loss and is not significant for image
degradation .
TECHNOLOGIST CERTIFICATION
EXAM 1 PRACTICE EXAM LATEST
UPDATED FINAL EXAM WIT
TABLE OF CONTENTS
Section Topic Questions
I Radiation Physics & Fundamentals 1-12
II Radiation Protection & Safety 13-22
III Image Production & Technical Factors 23-40
IV Image Quality & Digital Imaging 41-50
V Positioning & Procedures 51-62
VI Anatomy & Pathology 63-70
VII Patient Care & Medical Emergencies 71-80
VIII Contrast Media & Pharmacology 81-85
,Section Topic Questions
IX Equipment Operation & Quality Assurance 86-92
X Radiobiology & Biological Effects 93-100
SECTION I: RADIATION PHYSICS & FUNDAMENTALS
(Questions 1-12)
1. What is the primary purpose of diagnostic radiography?
A. To treat cancer
B. To produce diagnostic images of internal structures
C. To destroy tumor cells
D. To measure blood pressure
Correct Answer: B
Rationale: Radiography uses X-rays to visualize internal anatomy for diagnosis. X-rays
pass through the body and are detected by an image receptor, creating images that
help healthcare providers identify fractures, infections, tumors, and other conditions.
Treatment of cancer (A) is typically associated with radiation therapy, not diagnostic
radiography. Destroying tumor cells (C) is also a therapeutic application, not diagnostic
imaging. Measuring blood pressure (D) is unrelated to radiography and is performed
using a sphygmomanometer .
2. Which of the following is a form of ionizing radiation?
A. Ultrasound
B. MRI
C. X-rays
D. Infrared
,Correct Answer: C
Rationale: X-rays have enough energy to ionize atoms by removing electrons from their
orbits. This ionization capability allows X-rays to penetrate tissues and create diagnostic
images but also poses biological risks that require radiation protection measures.
Ultrasound (A) uses sound waves and is non-ionizing. MRI (B) uses magnetic fields and
radiofrequency pulses, also non-ionizing. Infrared (D) is part of the electromagnetic
spectrum with lower energy, used for thermal imaging, and does not cause ionization .
3. The unit of absorbed radiation dose is:
A. Curie
B. Gray
C. Roentgen
D. Tesla
Correct Answer: B
Rationale: The Gray (Gy) is the SI unit of absorbed dose, measuring the energy
deposited by ionizing radiation per unit mass of tissue. One Gray equals one joule per
kilogram. The Curie (A) is a unit of radioactivity (disintegrations per second), not
absorbed dose. The Roentgen (C) is an older unit of exposure in air, measuring
ionization in air rather than absorbed energy in tissue. Tesla (D) is the unit of magnetic
field strength, used in MRI physics .
4. Which organ is most sensitive to radiation exposure?
A. Bone
B. Muscle
C. Reproductive organs
D. Skin
Correct Answer: C
Rationale: Gonadal (reproductive) tissue is highly radiosensitive due to its rapid cell
division and differentiation. Radiation exposure to the gonads is of particular concern
because it can cause genetic (hereditary) effects in future generations. The Law of
Bergonié and Tribondeau states that cells are more radiosensitive when they divide
, rapidly, are undifferentiated, and have a long future mitotic history. Reproductive cells
meet all these criteria .
5. What does ALARA stand for?
A. As Low As Reasonably Achievable
B. Always Limit Average Radiation Amount
C. Acute Level of Radiation Assessment
D. Applied Light Absorption Radiation Analysis
Correct Answer: A
Rationale: ALARA is a fundamental radiation safety principle that requires minimizing
radiation exposure to patients, personnel, and the public. This principle guides all
radiologic procedures, emphasizing that any radiation exposure should be kept as low
as reasonably achievable while still obtaining the necessary diagnostic information. The
concept applies to time, distance, and shielding—the three primary methods of
radiation protection. Incorrect options B, C, and D are not valid acronyms in radiologic
science .
6. The interaction between X-rays and matter that produces scatter radiation is:
A. Photoelectric effect
B. Compton scatter
C. Pair production
D. Coherent scattering
Correct Answer: B
Rationale: Compton scatter occurs when an incoming X-ray photon interacts with an
outer-shell electron, causing the photon to lose energy and change direction. This
scattered radiation degrades image quality by creating fog and increases occupational
exposure risk to personnel. The photoelectric effect (A) involves complete absorption of
the photon and contributes to image contrast. Pair production (C) requires extremely
high energy (1.02 MeV) and does not occur in diagnostic X-ray ranges. Coherent
scattering (D) results in minimal energy loss and is not significant for image
degradation .
