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INFLUENCE OF THE IN-PLANE ARTEFACT IN CHEST TOMOSYNTHESIS ON PULMONARY NODULE SIZE MEASUREMENTS

Journal article
Authors Christina Söderman
Åse (Allansdotter) Johnsson
Jenny Vikgren
Rauni Rossi-Norrlund
David Molnar
Angelica Svalkvist
Lars Gunnar Månsson
Magnus Båth
Published in Radiation protection dosimetry
Volume 169
Issue 1-4
Pages 199-203
ISSN 1742-3406
Publication year 2016
Published at Institute of Clinical Sciences, Department of Radiation Physics
Institute of Clinical Sciences, Department of Radiology
Pages 199-203
Language en
Links dx.doi.org/10.1093/rpd/ncv536
Subject categories Radiology, Radiological physics

Abstract

The aim of the present study was to investigate how the in-plane artefact present in the scan direction around structures in tomosynthesis images should be managed when measuring the size of nodules in chest tomosynthesis images in order to achieve acceptable measurement accuracy. Data from measurements, performed by radiologists, of the longest diameter of artificial nodules inserted in chest tomosynthesis images were used. The association between the measurement error and the direction of the longest nodule diameter, relative to the scan direction, was evaluated using the Kendall rank correlation coefficient. All of the radiologists had chosen to not include the artefact in the measurements. Significant association between measurement error and the direction of the longest diameter was found for nodules larger than 12 mm, which indicates that, for these nodules, there is a risk of underestimating the nodule size if the in-plane artefact is omitted from manual diameter measurements.

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