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01.02.2014 | Original article

Semiautomated volumetric response evaluation as an imaging biomarker in superior sulcus tumors

verfasst von: C.G. Vos, MD, M. Dahele, J.R. van Sörnsen de Koste, S. Senan, I. Bahce, M.A. Paul, E. Thunnissen, E.F. Smit, K.J. Hartemink

Erschienen in: Strahlentherapie und Onkologie | Ausgabe 2/2014

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Abstract

Background

Volumetric response to therapy has been suggested as a biomarker for patient-centered outcomes. The primary aim of this pilot study was to investigate whether the volumetric response to induction chemoradiotherapy was associated with pathological complete response (pCR) or survival in patients with superior sulcus tumors managed with trimodality therapy. The secondary aim was to evaluate a semiautomated method for serial volume assessment.

Methods

In this retrospective study, treatment outcomes were obtained from a departmental database. The tumor was delineated on the computed tomography (CT) scan used for radiotherapy planning, which was typically performed during the first cycle of chemotherapy. These contours were transferred to the post-chemoradiotherapy diagnostic CT scan using deformable image registration (DIR) with/without manual editing.

Results

CT scans from 30 eligible patients were analyzed. Median follow-up was 51 months. Neither absolute nor relative reduction in tumor volume following chemoradiotherapy correlated with pCR or 2-year survival. The tumor volumes determined by DIR alone and DIR + manual editing correlated to a high degree (R² = 0.99, P < 0.01).

Conclusion

Volumetric response to induction chemoradiotherapy was not correlated with pCR or survival in patients with superior sulcus tumors managed with trimodality therapy. DIR-based contour propagation merits further evaluation as a tool for serial volumetric assessment.

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Titel: Semiautomated volumetric response evaluation as an imaging biomarker in superior sulcus tumors
verfasst von: C.G. Vos, MD
M. Dahele
J.R. van Sörnsen de Koste
S. Senan
I. Bahce
M.A. Paul
E. Thunnissen
E.F. Smit
K.J. Hartemink
Publikationsdatum: 01.02.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Strahlentherapie und Onkologie / Ausgabe 2/2014
Print ISSN: 0179-7158
Elektronische ISSN: 1439-099X
DOI: https://doi.org/10.1007/s00066-013-0482-3

Springer Medizin

Semiautomated volumetric response evaluation as an imaging biomarker in superior sulcus tumors