Longitudinal and multimodal radiomics models for head and neck cancer outcome prediction
Radiomics analysis provides a promising avenue towards the enabling of personalized radiotherapy. Most frequently, prognostic radiomics models are based on features extracted from medical images that are acquired before treatment. Here, we investigate whether combining data from multiple timepoints...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
21 January 2023
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| In: |
Cancers
Year: 2023, Jahrgang: 15, Heft: 3, Pages: 1-15 |
| ISSN: | 2072-6694 |
| DOI: | 10.3390/cancers15030673 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/cancers15030673 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/2072-6694/15/3/673 
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| Verfasserangaben: | Sebastian Starke, Alexander Zwanenburg, Karoline Leger, Klaus Zöphel, Jörg Kotzerke, Mechthild Krause, Michael Baumann, Esther G.C. Troost and Steffen Löck |
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| 520 | |a Radiomics analysis provides a promising avenue towards the enabling of personalized radiotherapy. Most frequently, prognostic radiomics models are based on features extracted from medical images that are acquired before treatment. Here, we investigate whether combining data from multiple timepoints during treatment and from multiple imaging modalities can improve the predictive ability of radiomics models. We extracted radiomics features from computed tomography (CT) images acquired before treatment as well as two and three weeks after the start of radiochemotherapy for 55 patients with locally advanced head and neck squamous cell carcinoma (HNSCC). Additionally, we obtained features from FDG-PET images taken before treatment and three weeks after the start of therapy. Cox proportional hazards models were then built based on features of the different image modalities, treatment timepoints, and combinations thereof using two different feature selection methods in a five-fold cross-validation approach. Based on the cross-validation results, feature signatures were derived and their performance was independently validated. Discrimination regarding loco-regional control was assessed by the concordance index (C-index) and log-rank tests were performed to assess risk stratification. The best prognostic performance was obtained for timepoints during treatment for all modalities. Overall, CT was the best discriminating modality with an independent validation C-index of 0.78 for week two and weeks two and three combined. However, none of these models achieved statistically significant patient stratification. Models based on FDG-PET features from week three provided both satisfactory discrimination (C-index = 0.61 and 0.64) and statistically significant stratification (p=0.044 and p<0.001), but produced highly imbalanced risk groups. After independent validation on larger datasets, the value of (multimodal) radiomics models combining several imaging timepoints should be prospectively assessed for personalized treatment strategies. | ||
| 650 | 4 | |a computed tomography | |
| 650 | 4 | |a Cox proportional hazards | |
| 650 | 4 | |a head and neck cancer | |
| 650 | 4 | |a loco-regional control | |
| 650 | 4 | |a longitudinal imaging | |
| 650 | 4 | |a positron emission tomography | |
| 650 | 4 | |a radiomics | |
| 650 | 4 | |a survival analysis | |
| 700 | 1 | |a Zwanenburg, Alexander |e VerfasserIn |4 aut | |
| 700 | 1 | |a Leger, Karoline |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zöphel, Klaus |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kotzerke, Jörg |e VerfasserIn |4 aut | |
| 700 | 1 | |a Krause, Mechthild |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Troost, Esther G. C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Löck, Steffen |e VerfasserIn |4 aut | |
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