Test-retest, inter- and intra-rater reproducibility of size measurements of focal bone marrow lesions in MRI in patients with multiple myeloma
Objective: - - To investigate the reproducibility of size measurements of focal bone marrow lesions (FL) in MRI in patients with monoclonal plasma cell disorders under variation of patient positioning and observer. - - Methods: - - A data set from a prospective test-retest study was used, in whic...
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| Hauptverfasser: | , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 April 2023
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| In: |
British journal of radiology
Year: 2023, Jahrgang: 96, Heft: 1145, Pages: 1-9 |
| ISSN: | 1748-880X |
| DOI: | 10.1259/bjr.20220745 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1259/bjr.20220745 Verlag, kostenfrei, Volltext: https://www.birpublications.org/doi/10.1259/bjr.20220745 
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| Verfasserangaben: | Markus Wennmann, Martin Grözinger, Vivienn Weru, Thomas Hielscher, Lukas Thomas Rotkopf, Fabian Bauer, Regula Gnirs, Tobias Nonnenmacher, Sandra Sauer, Hartmut Goldschmidt, Niels Weinhold, David Bonekamp, Tim Frederik Weber, Heinz-Peter Schlemmer and Stefan Delorme |
MARC
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| 245 | 1 | 0 | |a Test-retest, inter- and intra-rater reproducibility of size measurements of focal bone marrow lesions in MRI in patients with multiple myeloma |c Markus Wennmann, Martin Grözinger, Vivienn Weru, Thomas Hielscher, Lukas Thomas Rotkopf, Fabian Bauer, Regula Gnirs, Tobias Nonnenmacher, Sandra Sauer, Hartmut Goldschmidt, Niels Weinhold, David Bonekamp, Tim Frederik Weber, Heinz-Peter Schlemmer and Stefan Delorme |
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| 520 | |a Objective: - - To investigate the reproducibility of size measurements of focal bone marrow lesions (FL) in MRI in patients with monoclonal plasma cell disorders under variation of patient positioning and observer. - - Methods: - - A data set from a prospective test-retest study was used, in which 37 patients with a total of 140 FL had undergone 2 MRI scans with identical parameters after patient repositioning. Two readers measured long and short axis diameter on the initial scan in T1 weighted, T2 weighted short tau inversion recovery and diffusion-weighted imaging sequences. The first reader additionally measured FL on the retest-scan. The Bland-Altman method was used to assess limits of agreement (LoA), and the frequencies of absolute size changes were calculated. - - Results: - - In the simple test-retest experiment with one identical reader, a deviation of ≥1 mm / ≥2 mm / ≥3 mm for the long axis diameter in T1 weighted images was observed in 66% / 25% / 8% of cases. When comparing measurements of one reader on the first scan to the measurement of the other reader on the retest scan, a change of ≥1 mm / ≥3 mm / ≥5 mm for the long axis diameter in T1 weighted images was observed in 78% / 21% / 5% of cases. - - Conclusion: - - Small deviations in FL size are common and probably due to variation in patient positioning or inter-rater variability alone, without any actual biological change of the FL. Knowledge of the uncertainty associated with size measurements of FLs is critical for radiologists and oncologists when interpreting changes in FL size in clinical practice and in clinical trials. - - Advances in knowledge: - - According to the MY-RADs criteria, size measurements of focal lesions in MRI are now of relevance for response assessment in patients with monoclonal plasma cell disorders. - - Size changes of 1 or 2 mm are frequently observed due to uncertainty of the measurement only, while the actual focal lesion has not undergone any biological change. - - Size changes of at least 6 mm or more in T1 weighted or T2 weighted short tau inversion recovery sequences occur in only 5% or less of cases when the focal lesion has not undergone any biological change. | ||
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