BSCI/BSCCT coronary CT angiography radiation dose audit 2016

The BSCI is repeating the radiation dose survey of coronary CT angiography that was first carried out in 2014.

We are again collecting technique and radiation dose data from centres performing this exam to get an idea of how radiation doses have changed in the UK over the last two years.

We would like to invite you to take part in this survey irrespective of the workload at your centre. All data submitted will be anonymised with respect to centre prior to analysis. If you are hesitating because you suspect that your radiation doses are on the high side, remember that, if you submit your data, the survey will give a more accurate picture of real-life doses; doses at your centre will then look more in keeping with typical practice. If you take part you will receive a report showing the radiation dose distribution across UK centres for coronary CT angiography and you will also be given the results of the survey for your centre so that you can benchmark your centre against UK practice. Rest assured that the BSCI will not be challenging local techniques or decision processes - that is up to you to do once the survey is over.

Please email This email address is being protected from spambots. You need JavaScript enabled to view it. to register your interest and request the data collection and data analysis spreadsheets which contain all the necessary instructions for taking part in the survey.

 

 

BSCI radiation dose audit of computed tomography coronary angiography 2014

In 2014 the BSCI carried out an audit of the radiation dose of computed tomography coronary angiography, led by Dr Elly Castellano.

During March, 49 centres collected information on their cardiovascular CT work at the scanner side. Data included administration of beta-blockers, patient heart rate and BMI, and radiation dose descriptors for each series and for the total exam. The data at each centre was analysed to extract the median exam DLP, acquisition heart rate and patient BMI. If sufficient exams were available, further analysis was carried out to calculate the median exam DLP for prospective and retrospective acquisitions separately, and for the average patient with a heart rate of 60 bpm and a BMi of 28 kg/m2.

The median value across all participating centres of the median exam DLPs was 200 mGycm (inter-quartile range 130 to 320 mGycm). Using padding doubles the exam DLP from 120 to 250 mGycm for prospectively acquired exams, whereas retrospective gating with tube current pulsing increases the exam DLP by only a further 25% to 320 mGycm.