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European Radiology
Published in: European Radiology 9/2018

01-09-2018 | Interventional

Monitoring neurointerventional radiation doses using dose-tracking software: implications for the establishment of local diagnostic reference levels

Authors: Holly Acton, Karl James, Richard G. Kavanagh, Colm O’Tuathaigh, Deirdre Moloney, Gerald Wyse, Noel Fanning, Michael Maher, Owen J. O’Connor

Published in: European Radiology | Issue 9/2018

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Abstract

Objectives

There is potential for high radiation exposure during neurointerventional procedures. Increasing regulatory requirements mandate dose monitoring of patients and staff, and justification of high levels of radiation exposure. This paper demonstrates the potential to use radiation dose-tracking software to establish local diagnostic reference levels.

Methods

Consecutive neurointerventional procedures, performed in a single institution within a one-year period, were retrospectively studied. Dose area product (DAP) data were collected using dose-tracking software and clinical data obtained from a prospectively generated patient treatment database.

Results

Two hundred and sixty-four procedures met the selection criteria. Median DAP was 100 Gy.cm2 for aneurysm coiling procedures, 259 Gy.cm2 for arteriovenous malformation (AVM) embolisation procedures, 87 Gy.cm2 for stroke thrombolysis/thrombectomy, and 74 Gy.cm2 for four-vessel angiography. One hundred and nine aneurysm coiling procedures were further studied. Six significant variables were assessed using stepwise regression analysis to determine effect on DAP. Aneurysm location (anterior vs posterior circulation) had the single biggest effect (p = 0.004).

Conclusions

This paper confirms variable radiation exposures during neurointerventional procedures. The 75th percentile (used to define diagnostic reference levels) of DAP measurements represents a reasonable guidance metric for monitoring purposes. Results indicate that aneurysm location has the greatest impact on dose during coiling procedures and that anterior and posterior circulation coiling procedures should have separate diagnostic reference levels.

Key Points

• Dose-tracking software is useful for monitoring patient radiation dose during neurointerventional procedures
• This paper provides a template for methodology applicable to any interventional suite
• Local diagnostic reference levels were defined by using the 75th percentile of DAP as per International Commission on Radiological Protection recommendations
• Aneurysm location is the biggest determinant of radiation dose during coiling procedures.
• Anterior and posterior circulation coiling procedures should have separate diagnostic reference levels.
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Metadata
Title
Monitoring neurointerventional radiation doses using dose-tracking software: implications for the establishment of local diagnostic reference levels
Authors
Holly Acton
Karl James
Richard G. Kavanagh
Colm O’Tuathaigh
Deirdre Moloney
Gerald Wyse
Noel Fanning
Michael Maher
Owen J. O’Connor
Publication date
01-09-2018
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 9/2018
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-018-5405-3

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