Rectal cancer response to neoadjuvant chemoradiotherapy evaluated with MRI: Development and validation of a classification algorithm.
Objective: The aim of this study was to develop and validate a decision support model using data mining algorithms, based on morphologic features derived from MRI images, to discriminate between complete responders (CR) and non-complete responders (NCR) patients after neoadjuvant chemoradiotherapy (...
| Publicado en: | European Journal of Radiology Vol. 147 |
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| Autores principales: | , , , , , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Elsevier B.V.
Feb2022
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=154893459&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 154893459 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 0720048X 3S7 jtl: European Journal of Radiology issn: 0720048X maglogo: N pubinfo: dt: Feb2022 vid: 147 pid: 1004 pub: Elsevier B.V. artinfo: ui: 154893459 154893459 NLM34998098 154893459 10.1016/j.ejrad.2021.110146 NLM34998098 154893459 ppct: 1 formats: tig: atl: Rectal cancer response to neoadjuvant chemoradiotherapy evaluated with MRI: Development and validation of a classification algorithm. aug: au: Rengo, Marco Landolfi, Federica Picchia, Simona Bellini, Davide Losquadro, Chiara Badia, Stefano Caruso, Damiano Iannicelli, Elsa Osti, Mattia Falchetto Tombolini, Vincenzo Carbone, Iacopo Giunta, Gaetano Laghi, Andrea affil: Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome, Academic Diagnostic imaging Unit, ICOT Hospital, Via Franco Faggiana, 1668. 04100 Latina, Italy sug: subj: Rectal Neoplasms Drug Therapy Rectal Neoplasms Therapy Neoadjuvant Therapy Classification Algorithms Treatment Outcomes Retrospective Design Magnetic Resonance Imaging Human ab: Objective: The aim of this study was to develop and validate a decision support model using data mining algorithms, based on morphologic features derived from MRI images, to discriminate between complete responders (CR) and non-complete responders (NCR) patients after neoadjuvant chemoradiotherapy (CRT), in a population of patients with locally advanced rectal cancer (LARC).Methods: Two populations were retrospectively enrolled: group A (65 patients) was used to train a data mining decision tree algorithm whereas group B (30 patients) was used to validate it. All patients underwent surgery; according to the histology evaluation, patients were divided in CR and NCR. Staging and restaging MRI examinations were retrospectively analysed and seven parameters were considered for data mining classification. Five different classification methods were tested and evaluated in terms of sensitivity, specificity, accuracy and AUC in order to identify the classification model able to achieve the best performance. The best classification algorithm was subsequently applied to group B for validation: sensitivity, specificity, positive and negative predictive value, accuracy and ROC curve were calculated. Inter and intra-reader agreement were calculated.Results: Four features were selected for the development of the classification algorithm: MRI tumor regression grade (MR-TRG), staging volume (SV), tumor volume reduction rate (TVRR) and signal intensity reduction rate (SIRR). The decision tree J48 showed the highest efficiency: when applied to group B, all the CR and 18/21 NCR were correctly classified (sensitivity 85.71%, specificity 100%, PPV 100%, NPV 94.2%, accuracy 95.7%, AUC 0.833). Both inter- and intra-reader evaluation showed good agreement (κ > 0.6).Conclusions: The proposed decision support model may help in distinguishing between CR and NCR patients with LARC after CRT. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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