The Role of Standard and Advanced Imaging for the Management of Brain Malignancies from a Radiation Oncology Standpoint

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Abstract

Radiation therapy (RT) plays a critical role in the overall management of many central nervous system (CNS) tumors. Advances in RT treatment planning, with techniques such as intensity modulated radiation therapy, volumetric modulated arc therapy, and stereotactic radiosurgery, now allow the delivery of highly conformal dose with great precision. These techniques rely on high-resolution 3-dimensional anatomical imaging modalities such as computed tomography or magnetic resonance imaging (MRI) scans to accurately and reliably define CNS targets and normal tissue avoidance structures. The integration of cross-sectional imaging into radiation oncology has directly translated into improvements in the therapeutic window of RT, and the union between radiation oncology and imaging is only expected to grow stronger. In addition, advanced imaging modalities including diffusion, perfusion, and spectroscopic MRIs as well as positron emission tomography (PET) scans with novel tracers are being utilized to provide additional insight into tumor biology and behavior beyond anatomy. Together, these standard and advanced imaging modalities hold significant potential to improve future RT delivery and response assessment. In this review, we will discuss the current utilization of standard/advanced imaging for CNS tumors from a radiation oncology perspective as well as the implications of novel MRI and PET modalities currently under investigation.

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Press, R. H., Zhong, J., Gurbani, S. S., Weinberg, B. D., Eaton, B. R., Shim, H., & Shu, H. K. G. (2019, August 1). The Role of Standard and Advanced Imaging for the Management of Brain Malignancies from a Radiation Oncology Standpoint. Neurosurgery. Oxford University Press. https://doi.org/10.1093/neuros/nyy461

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