Assessing treatment response of osteolytic lesions by manual volumetry, automatic segmentation, and RECIST in experimental bone metastases

Bretschi M, Fraenzle A, Merz M, Hillengass J, Semmler W, Bendl R, Bäuerle T (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Academic Radiology Elsevier

Publisher: Elsevier

Book Volume: 21

Pages Range: 1177-84

Journal Issue: 9

DOI: 10.1016/j.acra.2014.04.011

Abstract

Aim of the study was to compare between volumetric and unidimensional approaches for treatment response monitoring in a nude rat model of experimental bone metastases. For the volumetric approach, an automated segmentation algorithm of osteolytic lesions was introduced and compared to manual volumetry.Nude rats bearing osteolytic metastases were treated with zoledronate and sunitinib and compared to controls. Treatment response was assessed longitudinally in vivo using flat-panel volumetric computed tomography at days 30, 35, 45, and 55 after tumor cell inoculation. The mean sizes and volumes of osteolytic lesions were determined according to response evaluation criteria in solid tumors (RECIST) and by automated and manual volumetry (software: MITK [The Medical Imaging Interaction Toolkit, Heidelberg, Germany] and VIRTUOS, Heidelberg, Germany).In contrary to RECIST, the manual volumetric approach indicated a significant decrease in osteolytic lesion volume in response to treatment. The presented automatic segmentation algorithm for treatment monitoring identified bone metastases adequately and assessed changes in the osteolytic lesion volume over time according to manual volumetry.In an animal model, volumetric treatment response assessment of osteolytic bone metastases is superior to unidimensional measurements, and automated volumetric segmentation may be a valuable alternative to manual volume determination.

Authors with CRIS profile

Tobias Bäuerle Professur für Multimodale Bildgebung in der präklinischen Forschung

Involved external institutions

Deutsches Krebsforschungszentrum (DKFZ) DE Germany (DE) Universitätsklinikum Heidelberg DE Germany (DE)

How to cite

APA:

Bretschi, M., Fraenzle, A., Merz, M., Hillengass, J., Semmler, W., Bendl, R., & Bäuerle, T. (2014). Assessing treatment response of osteolytic lesions by manual volumetry, automatic segmentation, and RECIST in experimental bone metastases. Academic Radiology, 21(9), 1177-84. https://doi.org/10.1016/j.acra.2014.04.011

MLA:

Bretschi, Maren, et al. "Assessing treatment response of osteolytic lesions by manual volumetry, automatic segmentation, and RECIST in experimental bone metastases." Academic Radiology 21.9 (2014): 1177-84.

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