Quality Assurance Quality Control

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					Quality Assurance/Quality

        Chapter 10
Quality Assurance Definition
   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:
   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
   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
   Provides way to minimize the dose of
    radiation to patient and staff.
   Allows production of a quality
   Leads to decreased number of repeated
       Cost effective/safe
Technician’s Role
   Will be responsible for doing quality
    control tests.
   Interpreting data.
   Keeping of records.
   Technician will measure, plot and
    analyze data.
   Equipment needs will vary based on the
    clinic setting.
   Equipment may include:
       Tracking charts
       Tape measure or other measuring device
       Thermometer
       Level
Types of Quality Control Tests
that can be done
   Source-Image Distance Test
       Ensures accuracy of the SID
       Measure length
   Perpendicularity
       Ensures x-ray beam is properly centered
       Use Level
   Tube/Table/Crane Locks
       Check function of locks to make sure working
Tests continued
   X-ray Field Light
       Make sure light on x-ray machine can be seen
        with normal lights in room on.
   Light Field Size
       Make sure collimator dials are consistent with light
        field displayed
   Collimator/Cones/Diaphragms
       Used when collimator light is not available, verify
Tests continued
   Locks/Cables/Overhead Crane Movement
       Ensure adequate locking of crane so doesn’t “drift”
        during radiographs
   Angulation Indicator
       Ensure angle indicator is correct when using
        angulation of x-ray tube.
   View Box uniformity
       Make sure light is even throughout view box
Tests continued
   Light Field/X-ray Field Alignment
       Ensures x-ray field is actually going where the
        light field indicates
   Screen Film Contact
       Ensures that screens are securely in cassette.
   Uniformity of Screen Speed
       Determines if screens have lost speed through
        wear and tear.
Tests Continued
   Calibration Tests
       Must be performed by a professional. Should be
        done annually.
   Fog Test
       Assesses if unwanted fog is being added to
        radiograph during processing.
   Sensitometry and Densitometry
       Ensures that processing of radiographs is
       Tests the processing procedure.

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