MEDRADSC 3H03 Study Guide - Midterm Guide: Paap, Fluorescent Lamp, Digital Imaging

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3H03
• Professor: Dwight Mountford

Document Summary

Collimation test using rmi collimator test tool. All the marks are radiopaque measurements: place on detector ns collimate 2cm from all the sides. Centre x-ray field to centre ir alignment use test tool and measure. X-ray beam perpendicularity: set up rmi collimator & perpendicularity tools, 1st ring ~1. 5 degree variance, 2nd ring ~ 3 degree variance (at sid = 100cm) Decrease the amount of scatter radiation, ensuring only photons of correct direction and energy reach receptor (useful beam only: 2 main types, fixed on the bucky, stationary used in portables. Grid alignment sc35 sec c. 3. 6. 2. y10 (pg 53: movement & uniformity should be even, don"t want grid cut off, alignment should be within 1 inch. Film days display was film itself: qc check of light behind it. Now more complex different monitors with their own contrast & spatial resolution. Display monitor qc: monitors serve to provide the user w/ a visual display, based on different shades of gray.