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Section A: History of Radiography & X-Ray Discovery (8 Questions)
Q1: A radiography student is researching the origins of medical imaging for a class
presentation. The student learns that the discovery of "X-rays" occurred in 1895 when a
German physicist noticed a fluorescent glow from a nearby screen while experimenting
with cathode rays. This physicist was:
A. Thomas Edison
B. William Coolidge
C. Wilhelm C. Roentgen [CORRECT]
D. Marie Curie
Correct Answer: C
Rationale: Wilhelm C. Roentgen discovered X-rays on November 8, 1895. Edison
improved the fluoroscope, Coolidge developed the hot-cathode X-ray tube, and Curie
discovered radioactivity but did not discover X-rays.
Q2: A professor asks a student to explain the fundamental definition of radiography. The
student responds that radiography is:
A. The surgical removal of tumors using radioactive isotopes
,B. The therapeutic application of radiation to treat cancer
C. The use of X-rays to create a medical image on patients [CORRECT]
D. The study of radioactive decay in nuclear medicine
Correct Answer: C
Rationale: Radiography is defined as the use of X-rays to create medical images.
Options A and B describe radiation therapy, and D describes nuclear physics rather than
diagnostic imaging.
Q3: A student is studying the evolution of radiographic equipment. The transition from
glass photographic plates to flexible film coated with silver halide crystals represented a
major advancement in:
A. Radiation protection
B. Image receptor technology [CORRECT]
C. X-ray tube design
D. Patient positioning
Correct Answer: B
Rationale: The development of flexible radiographic film with silver halide crystals was a
major advancement in image receptor technology. It did not directly improve protection,
tube design, or positioning techniques.
Q4: During a lecture on imaging history, the instructor explains that early radiographers
used red-light illumination in darkrooms because:
, A. Red light enhances the visibility of anatomical structures
B. Red light is the only wavelength that does not expose unprocessed radiographic film
[CORRECT]
C. Red light reduces radiation scatter during processing
D. Red light was the only color available in the 1890s
Correct Answer: B
Rationale: Radiographic film is insensitive to red light (safe light), allowing technicians
to work in the darkroom without fogging the film. It does not enhance anatomy visibility,
reduce scatter, or relate to color availability.
Q5: A student learns that the evolution from analog film-screen systems to computed
radiography (CR) and digital radiography (DR) represents a shift in which fundamental
aspect of radiography?
A. Radiation protection philosophy
B. Image acquisition and display technology [CORRECT]
C. Patient positioning techniques
D. X-ray production physics
Correct Answer: B
Rationale: The transition from analog to digital represents a shift in image acquisition
and display technology. The underlying physics of X-ray production and basic
positioning principles remain unchanged.