IEC 61223-2-7:1999 pdf download.Evaluation and routine testing in medical imaging departments
1 Scope and object
1.1 Scope
This part of IEC 61 223 applies to RADIOLOGICAL INSTALLATIONS with diagnostic X-ray systems
designed to expose intra-orally placed radiographic films or electronic equipment (sensors),
but excluding dental panoramic equipment.
This standard is a part of a series of Particular Publications (standards and technical reports),
which give methods of tests for the constancy of operation of various subsystems of
diagnostic X- RAY EQUIPMENT .
This part of IEC 61 223 is designed to be applicable to equipment for intra-oral dental
radiography without digital imaging devices.
1.2 Object
This standard describes a method to check, in terms of functional parameters, that the
constancy of the quality of images produced by intra-oral dental X- RAY EQUIPMENT is
maintained after installation, calibration and adjustment have been carried out.
This standard defines
–the functional parameters, which describe the performance of X- RAY EQUIPMENT for intra- oral dental radiographic examination;
– methods of checking, whether variations in measured functional parameters meet ESTABLISHED CRITERIA , in order to ensure that the conditions for adequate imaging performance are maintained, while unnecessary IRRADIATION of the PATIENT is avoided. The methods are based upon assessment of radiographic information using an appropriate TEST DEVICE .
The purpose of the methods is
– to establish a reference level of performance following an ACCEPTANCE TEST and an initial
CONSTANCY TEST ;
–to detect and verify any significant variation in functional parameters which may then
require corrective actions.
Because RADIOLOGICAL INSTALLATIONS differ widely from each other, it is not possible in this
standard to specify target values and tolerances for the parameters which would be generally
applicable as criteria of acceptable performance. Guidance is given, however, as to the
degree of variation in single measurements which might require appropriate action.
This standard gives methods of tests for the constancy of properties of diagnostic X- RAY
EQUIPMENT as described in IEC 61 223-1 (see clause 2).
This standard is not intended to deal with:
-aspects of mechanical or electrical safety;
-checks of the effectiveness of the direct means of protection against X- RADIATION;
-optimization of imaging performance.
In general, the use of a densitometer to check the optical densities is recommended.
However, for simplicity, in this standard only the use of a simple TEST DEVICE and the visual
comparison of a UNIFORM CONSTANCY TEST FILM with a reference INITIAL CONSTANCY TEST FILM is
regarded as sufficient.
With regard to the measurements, reference is made to methods described in related
publications which, for practical reasons, should be carried out prior to the application of the
methods described in this standard (see clause 2).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 223. For dated references, subsequent amend- ments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61 223 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60788:1 984, Medical radiology – Terminology
IEC 61 223-1 :1 993, Evaluation and routine testing in medical imaging departments – Part 1 :
General aspects
IEC 61 223-2-1 :1 993, Evaluation and routine testing in medical imaging departments – Part 2-1 :
Constancy tests – Film processors
IEC 61 223-2-2:1 993, Evaluation and routine testing in medical imaging departments – Part 2-2:
Constancy tests – Radiographic cassettes and film changers – Film-screen contact and
relative sensitivity of the screen-cassette assembly
IEC 61 223-2-3:1 993, Evaluation and routine testing in medical imaging departments – Part 2-3:
Constancy tests – Darkroom safelight conditions
IEC 61 223-2-4:1 994, Evaluation and routine testing in medical imaging departments – Part 2-4:
Constancy tests – Hard copy cameras
IEC 61 223-2-5:1 994, Evaluation and routine testing in medical imaging departments – Part 2-5:
Constancy tests – Image display devices
IEC 61223-2-7:1999 pdf download
