ESOI Webinars 

In May 2015 ESOI started to offer a series of educational webinars with various topics related to oncologic imaging and has continued with another series in 2016. The webinars were very successful and well visited in the past two years and attracted many international participants from all over the world. Hence, ESOI has planned to organize 12-13 webinars on various topics in 2017. Each webinar will last approximately 60 minutes (50 min. presentation and 10 min. for discussion/questions).

Registration for the first 2 online educational webinars will be free of charge and will be open to every interested participant. Webinar 3-13 will be free of charge but only open to active ESOI members. Membership is offered for 30,00 euro to full and associate members and for 10,00 euro to residents.

The online educational webinars of ESOI are kindly supported by Bracco.

Upcoming Webinars 2017


1. Imaging of CNS tumours

Paul M. Parizel, Antwerp/BE
Thursday, January 26, 2017
6:00 PM (CET)

ECR ESR President Prof. Paul Parizel inaugurates the 2017 edition of the ESOI Webinars with a lecture entitled "Imaging of central nervous system tumours"

REGISTER FOR FREE AT THE FOLLOWING link:…/8915189203134955778

(This webinar is free of charge and open to every interested participant!)


In patients with CNS tumors, imaging has been used mainly as a diagnostic method to provide gross morphologic ("anatomic") images in several imaging planes, or volumes. Technological improvements have mainly resulted in making "better", "prettier" and “faster” images with higher spatial, contrast and temporal resolution. Unfortunately, many CNS lesions present similar imaging characteristics on conventional imaging methods (routine MRI); for example, a malignant glioma, a cerebral abscess and a necrotic metastasis may all present a very similar appearance, as a thick-walled ring-enhancing mass, with a central necrotic cavity.

In recent years, the management of patients with CNS tumors has changed significantly. The introduction of multiparametric MR imaging, allows us to perform comprehensive neuro-imaging studies that not only yield high-resolution anatomical images, but also provide an insight into tissue characteristics. These methods have great impact on the management and follow-up of neuro-oncological patients. Due to obvious time constraints, during this presentation, I will focus mainly on CNS tumors of the brain.

Magnetic resonance spectroscopy (MRS) yields information regarding the biochemical composition of tissues and tumors. MRS can be performed as a single-voxel or multi-voxel technique. The method is used in the diagnosis and post-treatment follow-up of patients with brain tumors.

Diffusion-weighted imaging (DWI) provides a unique insight into the ultrastructural organization of tissues at a cellular level (e.g. cell density, nucleus/cytoplasm ratio). Quantitative diffusion metrics such as the apparent diffusion coefficient (ADC) can be used to document tumor recurrence in patients with high-grade glioma. Diffusion-tensor imaging (DTI) with tractography is commonly used in presurgical planning, to assess the resectability of a tumor. More advanced diffusion methods, such as diffusion kurtosis imaging (DKI), could provide additional information about the tumor and its surrounding tissue.

Perfusion-weighted imaging (PWI) offers physiological information regarding the capillary microcirculation of tissues, and plays an increasingly important role in the diagnosis, treatment planning and follow-up of patients with brain tumors. PWI is performed by rapid intravenous injection of a Gd contrast agent, and following the passage of the contrast bolus over time; this technique is called “dynamic susceptibility contrast (DSC)” imaging. DSC is usually followed by a series of rapidly repeated T1-weighted images, showing progressive enhancement of the tumor; this is known as “dynamic contrast-enhanced (DCE)” T1-weighted imaging. Alternatively, PWI can be performed with arterial spin la- belling (ASL), a technique in which magnetically labelled blood acts as an endogenous tracer to provide quantitative cerebral blood flow (CBF) measurements. PWI is helpful in grading glial tumors, the idea being that the more aggressive a glioma is, the more abnormal the vasculature (with notable exceptions including pilocytic/pilomyxoid astrocytoma, oligoden- droglioma, neurocytoma, and some dysembryoplastic tumors). PWI parameters can be used to predict future tumor behavior and outcome, and may influence the decision on where to obtain a surgical biopsy.

Functional MRI (fMRI) is a technique that shows the brain "at work"; in a few years. It is used for pre-operative localization of eloquent brain regions (e.g. motor cortex, Broca’s speech center, etc.). fMRI has evolved from the research laboratory to an essential tool in the pre-operative work-up of brain tumors.

In summary, technological advances have allowed us to perform comprehensive neuro-imaging studies that not only show anatomical images, but also provide iformation regarding tissue characteristics such as perfusion and diffusion, white matter tractography, spectroscopy, fMRI, etc. The purpose of this lecture is to offer an introduction to multiparametric imaging in routine high-end neuroradiology of CNS tumors in the brain.

Learning Objectives:


Kindly click here for a detailed list of all upcoming webinars in 2017.


Membership application/renewal - for the year 2017 will be possible soon!

Benefits of your ESOI 2017 Membership*
*depending on the respective membership type