caa a22 4500 39750389X CHVBK 20180308164539.0 cr unu---uuuuu 161202e19950101xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082584 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082584 Computed Tomography Practice in Sweden. Quality Control, Techniques and Patient Dose [Elektronische Daten] [G. Szendrö, B. Axelsson, W. Leitz] A survey on computed tomography (CT) practice was carried out in Sweden. The items investigated were the examination frequency, the age/sex distribution and the techniques used for all types of examination, including the assessment of the patient dose. The radiation doses were analysed and discussed with respect to individual values, to the variation with different techniques and different types of equipment, to the collective impact for the whole country, and to the level of quality control measures applied. Examination statistics and techniques were derived from protocols recorded for every patient examination performed in one week, containing all relevant patient and exposure data. The dose assessment was based on measurements with a pencil-shaped ionisation chamber in cylindrical standard phantoms and free in air. All but one of the 90 CT scanners installed in Sweden at the time of this investigation participated. The examination statistics are similar to those reported from other countries, especially with regard to the age and sex distribution and to the type of examinations. The patient dose was strongly correlated with the type of equipment, was moderated slightly with differences in the choice of exposure settings, and showed no correlation at all with the extent of QC activities. The annual frequency is 24 CT examinations per 1000 inhabitants, leading to a collective dose of 840 man.Sv. or approximately 0.1 mSv per inhabitant. Examinations of the trunk region give the largest contributions, followed by examinations of the brain and the spine. Radiation Protection Dosimetry Szendrö G. aut Axelsson B. aut Leitz W. aut Radiation Protection Dosimetry Oxford University Press 57/1-4(1995-01-01), 469-473 0144-8420 57:1-4<469 1995 57 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082584 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082584 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Szendrö G. aut NATIONALLICENCE 700 1- Axelsson B. aut NATIONALLICENCE 700 1- Leitz W. aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 57/1-4(1995-01-01), 469-473 0144-8420 57:1-4<469 1995 57 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford