Imaging Equipment and QC 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 Imaging Equipment and QC Questions and Answers flashcards as text
What is the primary safety concern with portable X-ray equipment on hospital wards?
Answer: Radiation exposure to nearby patients and staff
Radiation exposure to nearby persons is the primary concern, addressed by distance, shielding, and announcements.
What does focal spot size affect, and how is it measured during QC?
Answer: Spatial resolution and sharpness; star pattern or slit camera
Focal spot size affects geometric unsharpness and resolution, measured with star patterns or slit cameras.
Daily CT QC shows degraded low-contrast detectability. What should be investigated?
Answer: Room temperature, detector calibration, tube output, and noise levels
Degraded LCD typically indicates increased noise from calibration drift, reduced output, or environmental factors.
What is the purpose of dose-area product (DAP) measurement?
Answer: Estimate total radiation energy delivered, accounting for dose and field size
DAP measures air kerma multiplied by irradiated area, estimating total radiation energy.
CT images show a ring artefact. What is the most likely cause?
Answer: Miscalibrated or defective detector element
A faulty detector element gives consistently incorrect readings, tracing a ring as the gantry rotates.
What regulatory standard governs diagnostic X-ray equipment safety in Canada?
Answer: Health Canada Radiation Emitting Devices Act and Safety Code 35
REDA and Safety Code 35 establish the Canadian regulatory framework.