Quality Control and Patient Dose From X Ray Examinations in Some Hospitals in Estonia

A nation-wide survey on radiation doses in diagnostic and interventional radiology was conducted in Switzerland in 1998 aiming at establishing their collective radiological impact on the Swiss population. The study consisted on the one hand of surveying the frequency of more than 250 types of examinations, covering conventional radiology, mammography, fluoroscopy, angiography, interventional radiology, CT, bone densitometry, conventional tomography and dental radiology. On the other hand, for each type of examination the associated patient dose was established by modeling. The results of this study show that about 9.5 million diagnostic and interventional examinations are performed annually in Switzerland (1.34 per caput) and that the associated annual collective dose is of the order of 7100 person.Sv (1.0 mSv per caput). Switzerland is similar to other European countries in terms of the frequency of examinations and the collective dose.

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Nation-Wide Survey on Radiation Doses in Diagnostic and Interventional Radiology in Switzerland in 1998

Aroua

Burnand

Decka

et al. 2002

Health Physics

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Reconstruction of Absorbed Doses to Fibroglandular Tissue of the Breast of Women Undergoing Mammography (1960 to the Present)

Thierry-Chef

Simon

Weinstock³

et al. 2012

Radiation Research

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The assessment of potential benefits versus harms from mammographic examinations as described in the controversial breast cancer screening recommendations of the U.S. Preventive Task Force included limited consideration of absorbed dose to the fibroglandular tissue of the breast (glandular tissue dose), the tissue at risk for breast cancer. Epidemiological studies on cancer risks associated with diagnostic radiological examinations often lack accurate information on glandular tissue dose, and there is a clear need for better estimates of these doses. Our objective was to develop a quantitative summary of glandular tissue doses from mammography by considering sources of variation over time in key parameters including imaging protocols, x-ray target materials, voltage, filtration, incident air kerma, compressed breast thickness, and breast composition. We estimated the minimum, maximum, and mean values for glandular tissue dose for populations of exposed women within 5-year periods from 1960 to the present, with the minimum to maximum range likely including 90% to 95% of the entirety of the dose range from mammography in North America and Europe. Glandular tissue dose from a single view in mammography is presently about 2 mGy, about one-sixth the dose in the 1960s. The ratio of our estimates of maximum to minimum glandular tissue doses for average-size breasts was about 100 in the 1960s compared to a ratio of about 5 in recent years. Findings from our analysis provide quantitative information on glandular tissue doses from mammographic examinations which can be used in epidemiologic studies of breast cancer.

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Quality Control and Patient Dose From X Ray Examinations in Some Hospitals in Estonia

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Nation-Wide Survey on Radiation Doses in Diagnostic and Interventional Radiology in Switzerland in 1998

Nation-Wide Survey on Radiation Doses in Diagnostic and Interventional Radiology in Switzerland in 1998

Reconstruction of Absorbed Doses to Fibroglandular Tissue of the Breast of Women Undergoing Mammography (1960 to the Present)

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