Chapter 1 Flashcards
How many bones are in the human body?
206
The number 1 way of preventing spread of microorganisms is _____
Hand Washing
Organization that provides directives for infection control
CDC
What is peristalsis?
Rhythmic action of muscular tissue present in the digestive system
Examples of voluntary movement include:
Nervousness
Discomfort
Excitability
Mental illness
Fear
Age
Breathing
How can a technologist control voluntary motion?
Giving clear instructions
Providing comfort
Adjusting support devices
Applying immobilization
DECREASE EXPOSURE TIME
What is an IR?
Image Receptor
What devices can be place between the patient and the IR?
Grids
Lead Shields
Filters
Primary factors in technique include:
mAs
kVp
AEC’s
SID
Patient size
IR/ radiation field dimensions
What is another term for the “principal beam of rays”?
The Central Ray (CR)
How is the central ray positioned in relation to the structure of interest?
Perpendicular
What is SID?
Source to Image Distance
Why is SID important?
Magnification of anatomy
Spacial resolution
Patient dose
True or False: Increasing the SID will decrease the patient dose.
True, a higher SID decreases both magnification and patient dose
What is the date of the first X-rays creation
November 8,1895
The 2 main purposes of collimation are:
Minimize radiation to the patient
Reduce scatter radiation
Describe “Anatomical Position”
The subject is standing upright (erect), facing forward, arms extended by their sides with palms of the hands directed forward, heels together and toes pointing anteriorly.
What do PA and AP stand for?
PA - Posterior-Anterior (Back to Front)
AP - Anterior-Posterior (Front to Back)
What do AP, PA and lateral refer to?
The path of the central ray through the body.
What does ALARA stand for?
As Low As Reasonably Achieveable
What does ASIS stand for?
Anterior Superior Iliac Spine