Dose reduction in Cardiac CT using iterative reconstruction

Congress:

EuroSafe Imaging 2016

Poster Number:

ESI-0005

Type:

EuroSafe Imaging

Keywords:

Action 4 - Quality of radiological equipment, Action 3 - Optimisation, diagnostic reference levels, image quality, Action 2 - Clinical audit, Action 6 - Clinical audit tool for imaging, Action 2 - Clinical diagnostic reference levels (DRLs), Action 3 - Image quality assessment based on clinical indications

Authors:

E. J. R. Van Beek, M. Williams, M. Rodriguez, A. Marin, N. Weir, S. Mirsadraee, D. E. Newby

DOI:

10.1594/esi2016/ESI-0005

DOI-Link:

https://dx.doi.org/10.1594/esi2016/ESI-0005

Fig. 1: Radiation dose reduction techniques in cardiac CT.

Fig. 2: Figure 2. Box pot showing the reduction in radiation dose in Group 1, 2 and 3.

Fig. 3: Figure 3: Example CTCA images from patient with chest pain showing (A) 3D image...

Fig. 4: Figure 4 : Radiation dose reduction in computed tomography imaging for (A)...

Background/Introduction

Radiation dose is an important concern in cardiovascular imaging. Repeated testing and traditionally high radiation dose examinations means that cardiac imaging is responsible for a major proportion of radiation exposure due to medical imaging. (Fazel et al., 2009) Radiation induced carcinogenesis is a potential risk of computed tomography (CT) imaging. It has been estimated that in the US between 0.4 and 2% of all cancers are due to radiation exposures due to CT imaging. (Brenner & Elliston, 2004) Investigations for patients with suspected or known...

Description of activity and work performed

Radiation dose reduction in CTCA In a single centre cohort study we demonstrated that the combination of iterative reconstruction and automated tube current selection could reduce radiation dose while maintaining image quality. (Williams et al., 2013b) We reviewed the images of 942 consecutive patients who underwent electrocardiogram-gated CTCA using a 320 multidetector scanner (Aquilion ONE, Toshiba Medical Systems). The first 228 patients (Group 1) had their images reconstructed using filtered back projection (QDS+). The next 379 patients had their images reconstructed using iterative reconstruction (AIDR,...

Conclusion and Recommendations

Radiation dose in cardiovascular imaging is an important concern, particularly with the application of multiple tests and repeat imaging for patients with suspected or known coronary artery disease. Many techniques are now available to reduce the radiation dose of cardiac CT and all of the available methods should be applied where possible. Patient tailored tube current and voltage, along with iterative reconstruction, can be applied to reduce radiation dose while maintaining image quality in cardiac CT It is now possible to perform cardiac CT at...

Personal/Organisational information

E. J. R. Van Beek1, M. Williams2, M. Rodriguez3, A. Marin4, N. Weir5, S. Mirsadraee6, D. E. Newby5;1Queen's Medical Research Institute Edinburgh/UK,2Chancellor's Building Edinburgh/UK,3Clinical Research Imaging Centre, University of Edinburgh Edinburgh/UK,4The University Clinic of Pulmonary and Allergic Diseases Golnik Golnik/SI,5The University of Edinburgh Edinburgh/UK,6University of Edinburgh Edinburgh/UK

References

Achenbach, S., Marwan, M., Ropers, D., Schepis, T., Pflederer, T., Anders, K., et al. (2010). Coronary computed tomography angiography with a consistent dose below 1 mSv using prospectively electrocardiogram-triggered high-pitch spiral acquisition. European Heart Journal, 31(3), 340–346. http://doi.org/10.1093/eurheartj/ehp470 Brenner, D. J., & Elliston, C. D. (2004). Estimated Radiation Risks Potentially Associated with Full-Body CT Screening. Radiology, 232(3), 735–738. http://doi.org/10.1148/radiol.2323031095 Fazel, R., Krumholz, H. M., Wang, Y., Ross, J. S., Chen, J., Ting, H. H., et al. (2009). Exposure to low-dose ionizing radiation from medical imaging...