Pub Date : 2024-01-15DOI: 10.52560/2713-0118-2024-1-66-84
N. Zakharova, I. Pronin, A. I. Batalov, I. Chekhonin, A. N. Tyurina
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.
{"title":"Neuroimaging of brain tumors: back to the standardized MRI-protocol","authors":"N. Zakharova, I. Pronin, A. I. Batalov, I. Chekhonin, A. N. Tyurina","doi":"10.52560/2713-0118-2024-1-66-84","DOIUrl":"https://doi.org/10.52560/2713-0118-2024-1-66-84","url":null,"abstract":"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.","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-15DOI: 10.52560/2713-0118-2024-1-104-114
A. Shevchenko, E. Pogosbekyan, P. Vlasov, S. B. Agrba, S. A. Galstyan, A. I. Batalov, A. Melikyan, I. Pronin
{"title":"MR morphometry in the diagnosis of MR-negative focal cortical dysplasia (clinical case)","authors":"A. Shevchenko, E. Pogosbekyan, P. Vlasov, S. B. Agrba, S. A. Galstyan, A. I. Batalov, A. Melikyan, I. Pronin","doi":"10.52560/2713-0118-2024-1-104-114","DOIUrl":"https://doi.org/10.52560/2713-0118-2024-1-104-114","url":null,"abstract":"","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-12DOI: 10.52560/2713-0118-2024-1-37-50
K. S. Semin, N. Zakharova, S. Eliava, A. Konovalov, A. Kheireddin, D. B. Kalaeva, A. I. Batalov, I. Pronin
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.
{"title":"Aneurysm Wall Contrast on Magnetic Resonance Imaging: A New Predictor of Rupture of Saccular Intracranial Aneurysms","authors":"K. S. Semin, N. Zakharova, S. Eliava, A. Konovalov, A. Kheireddin, D. B. Kalaeva, A. I. Batalov, I. Pronin","doi":"10.52560/2713-0118-2024-1-37-50","DOIUrl":"https://doi.org/10.52560/2713-0118-2024-1-37-50","url":null,"abstract":"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.","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140509608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-12DOI: 10.52560/2713-0118-2024-1-85-103
I. Chekhonin, A. I. Batalov, N. Zakharova, V. N. Kornienko, I. Pronin
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.
{"title":"Magnetic resonance relaxometry in assessment of morphological properties of brain gliomas: state of the art","authors":"I. Chekhonin, A. I. Batalov, N. Zakharova, V. N. Kornienko, I. Pronin","doi":"10.52560/2713-0118-2024-1-85-103","DOIUrl":"https://doi.org/10.52560/2713-0118-2024-1-85-103","url":null,"abstract":"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.","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140509986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-11DOI: 10.52560/2713-0118-2024-1-51-65
R. Afandiev, N. Zakharova, G. V. Danilov, E. Pogosbekyan, S. Goryaynov, Ya. A. Latyshev, A. V. Kosyr’kova, A. D. Kravchuk, D. Y. Usachev, I. Pronin
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.
{"title":"Diffusion Kurtosis Imaging and Radiomics in Diffuse Axonal Injury","authors":"R. Afandiev, N. Zakharova, G. V. Danilov, E. Pogosbekyan, S. Goryaynov, Ya. A. Latyshev, A. V. Kosyr’kova, A. D. Kravchuk, D. Y. Usachev, I. Pronin","doi":"10.52560/2713-0118-2024-1-51-65","DOIUrl":"https://doi.org/10.52560/2713-0118-2024-1-51-65","url":null,"abstract":"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.","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140510633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-03DOI: 10.52560/2713-0118-2023-6-22-33
P. Rykhtik, E. N. Ryabova, I. Y. Demin, E. S. Gorshenina, D. Safonov
The article presents the experience of using liver elastometry and shear wave dispersion in patients after transplantation, followed by needle biopsy and morphological examination of the organ tissue. The paper shows that the use of elastometry and shear wave dispersion allows one to fairly accurately judge the state of the liver transplant parenchyma and choose the optimal strategy for treatment and management of the patient without performing an invasive procedure — puncture biopsy of the organ.
{"title":"Experience in the use of dispersion and shear waves in patients after liver transplantation","authors":"P. Rykhtik, E. N. Ryabova, I. Y. Demin, E. S. Gorshenina, D. Safonov","doi":"10.52560/2713-0118-2023-6-22-33","DOIUrl":"https://doi.org/10.52560/2713-0118-2023-6-22-33","url":null,"abstract":"The article presents the experience of using liver elastometry and shear wave dispersion in patients after transplantation, followed by needle biopsy and morphological examination of the organ tissue. The paper shows that the use of elastometry and shear wave dispersion allows one to fairly accurately judge the state of the liver transplant parenchyma and choose the optimal strategy for treatment and management of the patient without performing an invasive procedure — puncture biopsy of the organ.","PeriodicalId":516169,"journal":{"name":"Radiology - Practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139396088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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