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Extended analysis of the effect of learning with feedback on the detectability of pulmonary nodules in chest tomosynthesis

Artikel i övriga tidskrifter
Författare Sara Asplund
Åse (Allansdotter) Johnsson
Jenny Vikgren
Angelica Svalkvist
Marianne Boijsen
Valeria A Fisichella
Agneta Flinck
Åsa Wiksell
Jonas Ivarsson
Hans Rystedt
Lars Gunnar Månsson
Susanne Kheddache
Magnus Båth
Publicerad i Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Volym 7966
Sidor 796609
ISSN 1605-7422
Publiceringsår 2011
Publicerad vid Institutionen för kliniska vetenskaper, Avdelningen för radiofysik
Institutionen för pedagogik, kommunikation och lärande
Institutionen för kliniska vetenskaper, Avdelningen för radiologi
Sidor 796609
Språk en
Länkar dx.doi.org/10.1117/12.873059
Ämnesord Image perception , Observer performance evaluation , Technology assessment
Ämneskategorier Radiofysik, Radiologi, Utbildningsvetenskap

Sammanfattning

In chest tomosynthesis, low-dose projections collected over a limited angular range are used for reconstruction of section images of the chest, resulting in a reduction of disturbing anatomy at a moderate increase in radiation dose compared to chest radiography. In a previous study, we investigated the effects of learning with feedback on the detection of pulmonary nodules in chest tomosynthesis. Six observers with varying degrees of experience of chest tomosynthesis analyzed tomosynthesis cases for presence of pulmonary nodules. The cases were analyzed before and after learning with feedback. Multidetector computed tomography (MDCT) was used as reference. The differences in performance between the two readings were calculated using the jackknife alternative free-response receiver operating characteristics (JAFROC-2) as primary measure of detectability. Significant differences between the readings were found only for observers inexperienced in chest tomosynthesis. The purpose of the present study was to extend the statistical analysis of the results of the previous study, including JAFROC-1 analysis and FROC curves in the analysis. The results are consistent with the results of the previous study and, furthermore, JAFROC-1 gave lower p-values than JAFROC-2 for the observers who improved their performance after learning with feedback. © 2011 SPIE.

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