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Keywords:
Kv imaging, Statistics, Radiation safety, CT, Radioprotection / Radiation dose
Authors:
D. Kluszczynski, P. Pankowski, K. Majchrzak; Lodz/PL
DOI:
10.1594/ecr2016/C-2415
Methods and materials
The main task of the survey was to get reliable information on the doses obtained during most-frequent CT examinations performed on the selected adult population.
The types of the examinations were obtained from the database maintained by the National Health Fund (NHF) in Poland.
The NHF collects the statistical data which are used to reimburse for the medical protocols executed.
While the CT exams are reimbursed separately,
it is easy to mine the information on their number grouped by the types of exams.
The following types of the CT examinations were selected into the questionnaire:
-
Head
-
Neck
-
Chest
-
Abdomen
-
Pelvis
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Cervical spine
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Thoracic spine
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Lumbar spine
Additionally,
the questionnaire was complemented by the questions on angio-CT,
on dynamic-CT of liver and pancreas,
and on virtual colonography,
namely:
-
Cerebral perfusion CT
-
Dynamic CT of the liver and/or of the pancreas
-
CT angiography of the head
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Carotid CT angiography
-
Cardiac CT (other than CCTA)
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Coronary CT angiography (CCTA)
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CT angiography (CTA) of the chest
-
CT angiography of the thoracic aorta
-
abdominal CT angiography
-
CT angiography of the abdominal aorta,
coeliac trunk and renal arteries
-
CT lower limb angiography
-
CT colonography
Wherever applicable,
the information on the number of the phases to complete the examination was needed.
The X-ray departments were asked to approximate the number of different types of the examinations performed in the year 2013 and the standard dose obtained by an adult patient (any sex) weighted 80±10 kg.
The reported number of examinations could be useful to calculate the total number of CT examinations and,
comparing with the NHF data,
to calculate the share of CT exams which are not reimbursed by the NHF that is hard to discover other way.
The dose-length-product (DLP) was selected as the dose index useful for the further effective doses analysis.
The CT-questionnaire was included into the wider project which was the survey of the X-ray examinations performed in Poland.
This paper analyses the CT data only.