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Erschienen in: Journal of Neuro-Oncology 1/2017

01.07.2017 | Clinical Study

Temporal evolution of perfusion parameters in brain metastases treated with stereotactic radiosurgery: comparison of intravoxel incoherent motion and dynamic contrast enhanced MRI

verfasst von: Anish Kapadia, Hatef Mehrabian, John Conklin, Sean P. Symons, Pejman J. Maralani, Greg J. Stanisz, Arjun Sahgal, Hany Soliman, Chinthaka C. Heyn

Erschienen in: Journal of Neuro-Oncology | Ausgabe 1/2017

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Abstract

Intravoxel incoherent motion (IVIM) is a magnetic resonance imaging (MRI) technique that is seeing increasing use in neuro-oncology and offers an alternative to contrast-enhanced perfusion techniques for evaluation of tumor blood volume after stereotactic radiosurgery (SRS). To date, IVIM has not been validated against contrast enhanced techniques for brain metastases after SRS. In the present study, we measure blood volume for 20 brain metastases (15 patients) at baseline, 1 week and 1 month after SRS using IVIM and dynamic contrast enhanced (DCE)-MRI. Correlation between blood volume measurements made with IVIM and DCE-MRI show poor correlation at baseline, 1 week, and 1 month post SRS (r = 0.33, 0.14 and 0.30 respectively). At 1 week after treatment, no significant change in tumor blood volume was found using IVIM or DCE-MRI (p = 0.81 and 0.41 respectively). At 1 month, DCE-MRI showed a significant decrease in blood volume (p = 0.0002). IVIM, on the other hand, demonstrated the opposite effect and showed a significant increase in blood volume at 1 month (p = 0.03). The results of this study indicate that blood volume measured with IVIM and DCE-MRI are not equivalent. While this may relate to differences in the type of perfusion information each technique is providing, it could also reflect a limitation of tumor blood volume measurements made with IVIM after SRS. IVIM measurements of tumor blood volume in the month after SRS should therefore be interpreted with caution.
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Metadaten
Titel
Temporal evolution of perfusion parameters in brain metastases treated with stereotactic radiosurgery: comparison of intravoxel incoherent motion and dynamic contrast enhanced MRI
verfasst von
Anish Kapadia
Hatef Mehrabian
John Conklin
Sean P. Symons
Pejman J. Maralani
Greg J. Stanisz
Arjun Sahgal
Hany Soliman
Chinthaka C. Heyn
Publikationsdatum
01.07.2017
Verlag
Springer US
Erschienen in
Journal of Neuro-Oncology / Ausgabe 1/2017
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-017-2556-z

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