Image Production and Quality Questions and Answers Flashcards
6 cards from real CAMRT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Image Production and Quality Questions and Answers flashcards as text
What is the primary factor affecting spatial resolution in digital radiography?
Answer: Detector element (del) size
Del size is the primary determinant. Smaller dels resolve finer details.
In CR, what is the function of the photostimulable phosphor plate?
Answer: Stores X-ray energy as a latent image released by laser stimulation
The PSP plate stores X-ray energy as trapped electrons, read out by laser scanning.
What effect does increasing kVp have on image contrast in digital radiography?
Answer: Contrast decreases from more uniform penetration
Higher kVp reduces subject contrast because higher energy photons penetrate more uniformly.
What does the exposure indicator (EI) signify when significantly above target?
Answer: Detector overexposure, meaning more radiation than necessary
Above-target EI indicates the detector received more radiation than needed for a diagnostic image.
What is the modulation transfer function (MTF) used for in imaging?
Answer: Quantifying how well a system preserves spatial frequency information
MTF measures how effectively contrast is transferred at various spatial frequencies.
What causes Moire artefact in digital radiography?
Answer: Aliasing between grid frequency and detector pixel frequency
Moire artefact results from aliasing when grid line frequency approaches the detector Nyquist frequency.