MEDRADSC 2Y03 Lecture Notes - Lecture 3: Detent, Lead Shielding, Radiography
25 Oct 2019
School
Department
Course
Professor
Week 2 Lecture 1
September 11th, 2018
Objectives
• X-ray equipment
• X-ray lab
• X-ray tube components
• Distance and geometry
X-ray Equipment: Introduction to external components
Ceiling Support System
• Most frequently used
• 2 perpendicular mounted ceiling rails
• allows movement in many different angles
• in 4,6, and 3
Equipment – Shoot Through Hip – trauma
• not a good photo
o you cannot see the end of the pin
X-ray Equipment: Introduction to external components
Telescoping Column
• allows variable distances
• called source-image-distance in x-ray
o most common = 40 inches (100 cm) and 72 inches (180 cm)
• detent lock
X-ray Equipment: X-ray Console – Control Panel
Operating Console
• most familiar
• allows to control the x-ray tube current and voltage so that useful x-ray
beam of proper quantity and quality
• provides controls for kVp, mA or mAs, AEC, density, time, and focal spot
size
o AEC is automatic exposure control
o Time affects the amount of photons
X-ray Equipment Automatic Exposure Control
• three chambers
o once the chamber receives a certain number of photons it will stop exposing
more because it thinks it has enough radiation
• the technologist must position the patient directly over the chamber
X-ray Equipment: Introduction to external components
x-ray tube housing covers the glass envelope
• contains the x-ray tube
• bathed in oil
• insulates, protects, and supports the x-ray tube insert
from the environment
• the x-ray tube cools itself by the anode rotating, the
bathed in oil, the glass is heat resistant glass and there
are also fans
• taking to many exposures will cause the tube to heat up
X-ray Equipment: Introduction to external components
X-ray Tube Housing
• lead shielding
• federal/provincial regulation
• microswitch
B114 Room Orientation:
B114 C = Room 3 – PHILIPS
• 5 AEC chambers
