Inter-observer reproducibility of semi-automatic tumor diameter measurement and volumetric analysis in patients with lung cancer
Objectives - Therapy monitoring in oncologic patient requires precise measurement methods. In order to improve the precision of measurements, we used a semi-automated generic segmentation algorithm to measure the size of large lung cancer tumors. The reproducibility of computer-assisted measurements...
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
8 August 2013
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| In: |
Lung cancer
Year: 2013, Jahrgang: 82, Heft: 1, Pages: 76-82 |
| ISSN: | 1872-8332 |
| DOI: | 10.1016/j.lungcan.2013.07.006 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.lungcan.2013.07.006 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0169500213003152 
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| Verfasserangaben: | J. Dinkel, O. Khalilzadeh, C. Hintze, M. Fabel, M. Puderbach, M. Eichinger, H.-P. Schlemmer, M. Thorn, C.P. Heussel, M. Thomas, H.-U. Kauczor, J. Biederer |
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| 245 | 1 | 0 | |a Inter-observer reproducibility of semi-automatic tumor diameter measurement and volumetric analysis in patients with lung cancer |c J. Dinkel, O. Khalilzadeh, C. Hintze, M. Fabel, M. Puderbach, M. Eichinger, H.-P. Schlemmer, M. Thorn, C.P. Heussel, M. Thomas, H.-U. Kauczor, J. Biederer |
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| 520 | |a Objectives - Therapy monitoring in oncologic patient requires precise measurement methods. In order to improve the precision of measurements, we used a semi-automated generic segmentation algorithm to measure the size of large lung cancer tumors. The reproducibility of computer-assisted measurements were assessed and compared with manual measurements. - Methods - CT scans of 24 consecutive lung cancer patients who were referred to our hospital over a period of 6 months were analyzed. The tumor sizes were measured manually by 3 independent radiologists, according to World Health Organization (WHO) and the Revised Response Evaluation Criteria in Solid Tumors (RECIST) guidelines. At least 10 months later, measurements were repeated semi-automatically on the same scans by the same radiologists. The inter-observer reproducibility of all measurements was assessed and compared between manual and semi-automated measurements. - Results - Manual measurements of the tumor longest diameter were significantly (p<0.05) smaller compared with the semi-automated measurements. The intra-rater correlations coefficients were significantly higher for measurements of longest diameter (intra-class correlation coefficients: 0.998 vs. 0.986; p<0.001) and area (0.995 vs. 0.988; p=0.032) using semi-automated compared with manual method. The variation coefficient for manual measurement of the tumor area (WHO guideline, 15.7% vs. 7.3%) and the longest diameter (RECIST guideline, 7.7% vs. 2.7%) was 2-3 times that of semi-automated measurement. - Conclusions - By using computer-assisted size assessment in primary lung tumor, interobserver-variability can be reduced to about half to one-third compared to standard manual measurements. This indicates a high potential value for therapy monitoring in lung cancer patients. | ||
| 650 | 4 | |a Inter-rater reliability | |
| 650 | 4 | |a Lung cancer | |
| 650 | 4 | |a RECIST guideline | |
| 650 | 4 | |a Tumor size | |
| 650 | 4 | |a Volumetric analysis | |
| 650 | 4 | |a WHO guideline | |
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