1.3 Arabia assign the task of acceptance tests of


1.3 Quality control


The need for more frequent quality control
(QC) evaluations for x-ray, fluoroscopy, mammography and CT equipment could be
attributed to the incompetent servicing or lack of qualified and experienced
technologists or medical physicists. However, performing QC tests regularly,
can maintain the consistent performance and reduce the number of repeated examinations
and subsequently reduce the patient exposure to unjustified radiation doses.

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Implementation of the QC
program implies the optimum use of equipment, decreasing image retake and
create high-quality medical images. The benefits of using high-quality medical
images in diagnosing disease are well known, however, the QC of these images influenced
by a number of parameters. The various components of the image are ideally
tested independently and can be evaluated through measurements of different physical
parameters, such as distance accuracy, brightness, contrast, uniformity, and
spatial resolution.


QC is part of quality assurance
(QA) program which is often handled with medical equipment to ensure that they
working properly. Moreover, in the acceptance test, the radiology department tries
to answer if they get what they ordered, equipment is correctly placed in the
room, function as advertised, and providing acceptable images. These tests
should be performed immediately
after the installation of a new equipment of diagnostic imaging, and prior to
clinical use. Acceptance tests based on
valid international standards and should be independent of manufacturers or
agent using calibrated instruments.

Many facilities in Najran, Saudi
Arabia assign the task of acceptance tests of X-ray, fluoroscopy, mammography
or CT units to the agent or the manufacturer, leaving no guarantee to
ensure compliance with the equipment supply contract. This is can be due to several factors, the most
important of which is the paucity of a highly qualified medical physicist to
perform acceptance tests. This may be a major cause of not considering the
valid international standards, which leads to increase the error in the results
of quality control tests as well as increase the radiation doses to the patient
undergoing different imaging modality.