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Neuroradiology

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01-07-2016 | Interventional Neuroradiology

Dose comparison of classical 2-plane DSA and 3D rotational angiography for the assessment of intracranial aneurysms

Authors: N. Guberina, U. Lechel, M. Forsting, C. Mönninghoff, U. Dietrich, A. Ringelstein

Published in: Neuroradiology | Issue 7/2016

Abstract

Introduction

The purpose of this experimental phantom study was to compare radiation doses imparted to patients undergoing classical two-plane digital subtraction angiography (2-plane DSA) and 3D rotational angiography in interventional neuroradiology.

Methods

Thermoluminescence dosimeter (TLD) measurements were performed at an anthropomorphic phantom using a digital interventional angiography system. Two-plane DSA included posterior/anterior (PA) and lateral (LAT) projections (frame-rate, 7.6 frames (PA) and 9.8 frames (LAT) for a scan time of approximately 8 s; image intensifier 27 cm (PA) and 25 cm (LAT)). For 3D rotational angiography, 122 images were acquired from one single image run with the imaging system rotating 240° around the phantom’s head (image intensifier 37 cm).

Results

Effective dose was 0.4 mSv for 2-plane DSA compared to 0.1 mSv for 3D rotational angiography. Organ doses were approximately two to five times higher for classical 2-plane technique compared to the 3D rotational angiography, respectively: brain (11.4 vs. 2.4 mSv), eye lens (4.5 vs.1 mSv), salivary glands (7 vs. 1,7 mSv), oral mucosa (2.7 vs.0.9 mSv), thyroid (0.5 vs. 0.2 mSv), thymus (0.2 vs. 0.05 mSv), bone marrow within imaged region (1 vs. 0.2 mSv), oesophagus (0.07 vs. 0.03 mSv), endotracheal system (2.6 vs. 0.7 mSv) and skeletal components in the imaged region (0.7 vs. 0.2 mSv).

Conclusion

Three-dimensional rotational angiography clearly reduces radiation doses compared to the classical 2-plane technique. Replacement of additional 2-plane DSA projections with 3D rotational angiography will lead to a remarkable decrease in patient radiation dose, without loss of image quality. Thus, we recommend routine application of 3D rotational angiography, in particular for diagnostic assessment of aneurysm morphology.

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Title: Dose comparison of classical 2-plane DSA and 3D rotational angiography for the assessment of intracranial aneurysms
Authors: N. Guberina
U. Lechel
M. Forsting
C. Mönninghoff
U. Dietrich
A. Ringelstein
Publication date: 01-07-2016
Publisher: Springer Berlin Heidelberg
Published in: Neuroradiology / Issue 7/2016
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI: https://doi.org/10.1007/s00234-016-1671-4

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Dose comparison of classical 2-plane DSA and 3D rotational angiography for the assessment of intracranial aneurysms

Abstract

Introduction

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusion

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