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Date: 19 April 2024
Time: 18:25
X-ray radiation qualities
For calibrating diagnostic X-ray instruments, RRPPS produces the radiation qualities and irradiation conditions which are in accordance with the stated requirements of CEI/IEC 61267: 2005, Medical Diagnostic X-ray Equipment - Radiation Conditions for Use in the Determination of Characteristics.
A limited number of these beam qualities are included as standard; others are available by prior arrangement only.
| Standard radiation quality | X-ray tube voltage (kV) | Half-value layer (mm AI) |
|---|---|---|
| RQR 2 | 40 | 1.4 |
| RQR 3 | 50 | 1.8 |
| RQR 4 | 60 | 2.2 |
| RQR 5 | 70 | 2.6 |
| RQR 6 | 80 | 3.0 |
| RQR 7 | 90 | 3.5 |
| RQR 8 | 100 | 4.0 |
| RQR 9 | 120 | 5.0 |
| RQR 10 | 150 | 6.6 |
| Standard radiation quality | Approximate X-ray tube voltage (kV) | Normal first half-value layer (mm AI) |
|---|---|---|
| RQC | 70 | 8.4 |
| Standard radiation quality | X-ray tube voltage (kV) | Half-value layer (mm AI) |
|---|---|---|
| RQT8 | 100 | 6.9 |
| RQT9 | 120 | 8.4 |
| RQT10 | 150 | 10.1 |
As part of our quality assurance and measurement traceability procedures, the radiation qualities specified by the IEC are cross referenced against the measured X-ray spectrum end point (peak photon energy), obtained using a hyper pure germanium detector.
Further details may be obtained from our paper "Development of a Calibration Facility for Test Instrumentation in Diagnostic Radiology", S.Green, J.E.Palethorpe, D.E.Peach & D.A.Bradley, published in Radiation Protection Dosimetry No 67, July 1996, pp41-46. For more information see external links.
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