Transcript Quality Assurance/Quality Control

Quality Assurance/Quality
Control
Chapter 10
Quality Assurance Definition
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A system of activities whose purpose is
to provide assurance that the overall
quality control job is in fact being done
effectively. The system involves a
continuing education on the adequacy
and effectiveness of the overall quality
control program and initiates corrective
measures where necessary.
Activities of the Quality
Assurance Program Include:
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Preventative maintenance
Quality Control
Equipment calibration
In-service education of personnel
responsible for radiography
Other items such as the evaluation of
new products
Quality Control Definition
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The overall system of activities, the
purpose of which is to provide a quality
product or service that meets the need
of the users. The aim of quality control
is to provide quality that is satisfactory,
adequate, dependable, and economic.
Purpose of Quality Assurance/
Quality Control
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Provides way to minimize the dose of
radiation to patient and staff.
Allows production of a quality
radiograph.
Leads to decreased number of repeated
films
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Cost effective/safe
Technician’s Role
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Will be responsible for doing quality
control tests.
Interpreting data.
Keeping of records.
Technician will measure, plot and
analyze data.
Equipment
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Equipment needs will vary based on the
clinic setting.
Equipment may include:
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Tracking charts
Tape measure or other measuring device
Thermometer
Level
Types of Quality Control Tests
that can be done
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Source-Image Distance Test
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Perpendicularity
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Ensures accuracy of the SID
Measure length
Ensures x-ray beam is properly centered
Use Level
Tube/Table/Crane Locks
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Check function of locks to make sure working
Tests continued
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X-ray Field Light
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Light Field Size
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Make sure light on x-ray machine can be seen
with normal lights in room on.
Make sure collimator dials are consistent with light
field displayed
Collimator/Cones/Diaphragms
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Used when collimator light is not available, verify
sizes
Tests continued
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Locks/Cables/Overhead Crane Movement
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Angulation Indicator
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Ensure adequate locking of crane so doesn’t “drift”
during radiographs
Ensure angle indicator is correct when using
angulation of x-ray tube.
View Box uniformity
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Make sure light is even throughout view box
Tests continued
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Light Field/X-ray Field Alignment
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Screen Film Contact
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Ensures x-ray field is actually going where the
light field indicates
Ensures that screens are securely in cassette.
Uniformity of Screen Speed
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Determines if screens have lost speed through
wear and tear.
Tests Continued
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Calibration Tests
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Fog Test
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Must be performed by a professional. Should be
done annually.
Assesses if unwanted fog is being added to
radiograph during processing.
Sensitometry and Densitometry
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Ensures that processing of radiographs is
optimized.
Tests the processing procedure.