Glioblastoma is the most common high-grade primary brain tumor, occurring primarily in adults. This infiltrating tumor locates deep in the white matter, subcortical structures and thalamus. The typical localization of glioblastoma is supratentorial, accounting for more than 99% of cases. Primary infratentorial growth of glioblastomas involving the cerebellum is a very rare condition, occurring in less than 1 % of cases reported in the literature. The differential diagnosis consists mainly of solitary metastatic lesions and medulloblastoma. The clinical manifestations of cerebellar lesions are similar, but the methods of surgical and chemoradiotherapy treatment, prognosis and outcome in cases with various histologic types of the tumors are different.

Thus radiology, carried out using multiparametric MRI mapping, is an decision making procedure. In thus publication we present an atypical case of infratentorial glioblastoma in a 45-yearold patient.

This review provides insight into application of modern MRI modalities including diffusion kurtosis imaging in assessment of perifocal glioma zone. Differentiation of “pure” perifocal vasogenic edema from edema infiltrated by glioma cells, as well as identification of peritumoral intact (on conventional MRI) brain matter infiltration make it possible to determine glial tumor borders more accurately. Analysis of diffusion and perfusion quantitative MR data allow determining glioma borders in areas with unaltered blood-brain barrier. There is a growing possibility to develop a personalized navigation algorithm for surgical removal of the tumor, followed by the determination of an individual plan for radiation and chemotherapy, as well as prediction of disease outcomes.

Background. Recent studies suggest that accumulation of contrast agent in the aneurysm’s wall may predict a high risk of aneurysm growth or rupture.

Objective. To compare the enhancement of the aneurysm wall with other characteristics that affect at the risk of rupture.

Materials and Methods. The study included 95 patients with 132 previously identified saccular aneurysms, who underwent magnetic resonance imaging (MRI) according to a specialized protocol using 3.0 Tesla MRI scanner. The presence or absence of aneurysm’s wall enhancement compared with the following characteristics: gender and age of the patient, the size and shape of the aneurysm, the presence of arterial hypertension, and the PHASES score.

Results. Accumulation of contrast agent by the aneurysm’s wall was associated with the aneurysm dome size (p < 0,001, Sp = 78,1 %, Se = 72,1 %) and PHASES score (p < 0,001, Sp = 64,1 %, Se =57,1 %). No relationship between age, gender, arterial hypertension, shape, and aneurysm location and contrast enhancement was found (p > 0,05).

Conclusion. Contrast enhancement of the aneurysm wall on MRI can be considered an additional risk marker of its rupture.

This study aimed to assess the feasibility of radiomic features derived from diffusion kurtosis imaging (DK MRI) in identifying microstructural brain damage in diffuse axonal injury (DAI) and predicting its outcome. We hypothesized that radiomic features, computed from parametric DK MRI maps, may differ between healthy individuals and those with trauma, and may be related to DAI outcomes. The study included 31 DAI patients and 12 healthy volunteers. A total of 342,300 radiomic features were calculated (2282 features for each combination of 10 parametric DK maps with 15 regions of interest). Our findings suggest that the set of radiomic features effectively distinguishes between healthy and damaged brain tissues, and can predict DAI outcome. A broad spectrum of radiomic parameters based on DK MRI data showed high diagnostic and prognostic potential in DAI, presenting advantages beyond the traditionally used average values for the regions of interest on parametric DK MRI maps.

Despite the widespread application of MRI in brain tumor MR-imaging, the standardized MRI protocol has not yet been approved. This fact creates obstacles for interpreting of the obtained data and even limits the diagnostic power of MRI. Standardization of MRI studies facilitates successful planning of surgery, chemotherapy, or radiation therapy and provides more reliable follow-up. In this regard, unification of image acquisition parameters and protocols remains relevant. We propose a standard MRI protocol that includes axial and coronal T2-weighted images, axial or 3D T2-FLAIR, 3D T2* (gradient echo), diffusion-weighted imaging, axial T1-weighted images, contrast-enhanced spin-echo T1-weighted images (either axial or three planes) and obligatory subsequent isotropic 3D T1 images. The following combination of sequences facilitates the correct diagnosis and follow-up. The least magnetic field strength should be 1.5 T.

Magnetic resonance (MR) relaxometry, or measurement of tissue magnetic relaxation properties, is a technology intended to quantitatively depict the physical basis of structural MR imaging. This review is devoted to perspective directions of studies and application of MR relaxometry in brain glioma preoperative and pretherapeutic diagnosis. The current data advocate for emerging capabilities of relaxometry in glioma grading (despite possible overlap between different grades) and differentiating between gliomas and tumors of other origin. Some studies showed features of relaxometric values within the perifocal infiltrative edema zone possibly related to glioma infiltrative growth. We separately reviewed the works aimed at searching for the most aggressive and malignant foci in glioma tissue and extremely useful for tumor biopsy or removal. No less important are capabilities of relaxometry in radiogenomics, first of all, in IDH status prediction. The relaxometric method possesses perspective in multiparametric brain glioma diagnostics.

We presented a clinical case of MR-negative focal cortical dysplasia (FCD) type IIb, in which diagnostic value of semi- and automatic MR morphometry has been established. This method identified specific features for FCD in a patient with MR-negative form of focal epilepsy, such as blurring of the grey-white matter border and thickening of the cortex. The histological diagnosis of FCD type IIb has been confirmed in the region of interest detected by MR morphometry. Seizure freedom (Engel class Ia, follow-up 5 years) has been achieved after the surgical resection.