Generation of Diagnostic X-Ray Radiation Qualities in the Ssdl X-Ray System According to Iec 61267 Standard

Yıl 2016, Cilt: 1 Sayı: 3, 133 - 139, 27.12.2016

Doğan Yaşar , Enis Kapdan Hasan Erez Tülin Zengin Erol Kam

https://doi.org/10.30931/jetas.297617

Cited By: 1

Öz

Ionizing radiation metrology laboratories generate their own gamma and x-ray radiation qualities with
respect to reference radiations generated by international standards, such as IAEA (International Atomic
Energy Agency) used for the radiotherapy field, ISO (International Organization for Standardization) used
for the radiation protection field and IEC (International Electrotechnical Commission) used for the
diagnostic field. IEC constructed standards of four reference radiation qualities (RQR, RQA, RQC and
RQT) representing radiation energy qualities used in the diagnostic radiology. In this regard, SSDL
(Secondary Standard Dosimetry Laboratories), in parallel with developments in the diagnostic radiology,
have desire to carry out the calibration and test responsibility of dosimetry and measurement devices to be
used in the diagnostic radiology by generating their own radiation energy qualities and reference dosimetry
standards.
The first step of this study is to obtain x-ray radiation qualities. Diagnostic RQR radiation qualities represent
radiation beams applied to patients in general radiography, fluoroscopy and dental practices. RQR radiation
qualities were obtained according to criteria specified in IEC standard.
According to IEC standard, half value layer (HVL) filtered and unfiltered air kerma dose rates are predicted
to be a value between 0.485 and 0.515. In our study, those values were found to be between 0.497 and 0.506.
Reliability and conformity of obtained qualities were determined by using various measurement techniques.
In the second step of the study, after obtaining reference standard dosimetry calibrated in PSDL, which will
constitute the national standard, the international standardization will be extended throughout the country
by providing calibration services for dosimetry and measurement devices to the users in the diagnostic
radiology.

Anahtar Kelimeler

X-ray, radiation quality, dosimetry, diagnostic radiology, calibration

Kaynakça

• [1] Bennett, B. G., “Exposures from medikal radiation worldwide. Radiat. Prot. Dosimetry” 36 (1991): 237–242.
• [2] “International Commission on Radiological Protection. 1990 Recommendations of the Commission on Radiological Protection” ICRP Publication 60. Ann. ICRP 21(1990): (1–3) 42–43 (1990).
• [3] “International Electrotechnical Commission. IEC 61267- medikal diagnostic x-ray equipment-Radiation conditions for use in the determination of characteristics.” Geneva, Switzerland (2005).
• [4] “International Organization for Standardization-ISO 4037 X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy.” Geneva, Switzerland (1996).
• [5] “IAEA Technical Reports Series No.: 457Dosimetry in diagnostic radiology.” An international code of practice 2007.