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Chervenkov L, Sirakov N, Kostov G, Velikova T, Hadjidekov G. Future of prostate imaging: Artificial intelligence in assessing prostatic magnetic resonance imaging. World J Radiol 2023; 15:136-145. [PMID: 37275303 PMCID: PMC10236970 DOI: 10.4329/wjr.v15.i5.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/21/2023] [Accepted: 04/10/2023] [Indexed: 05/23/2023] Open
Abstract
Prostate cancer (Pca; adenocarcinoma) is one of the most common cancers in adult males and one of the leading causes of death in both men and women. The diagnosis of Pca requires substantial experience, and even then the lesions can be difficult to detect. Moreover, although the diagnostic approach for this disease has improved significantly with the advent of multiparametric magnetic resonance, that technology has certain unresolved limitations. In recent years artificial intelligence (AI) has been introduced to the field of radiology, providing new software solutions for prostate diagnostics. Precise mapping of the prostate has become possible through AI and this has greatly improved the accuracy of biopsy. AI has also allowed for certain suspicious lesions to be attributed to a given group according to the Prostate Imaging-Reporting & Data System classification. Finally, AI has facilitated the combination of data obtained from clinical, laboratory (prostate-specific antigen), imaging (magnetic resonance), and biopsy examinations, and in this way new regularities can be found which at the moment remain hidden. Further evolution of AI in this field is inevitable and it is almost certain to significantly expand the efficacy, accuracy and efficiency of diagnosis and treatment of Pca.
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Affiliation(s)
- Lyubomir Chervenkov
- Department of Diagnostic Imaging, Medical University Plovdiv, Plovdiv 4000, Bulgaria
- Research Complex for Translational Neuroscience, Medical University of Plovdiv, Bul. Vasil Aprilov 15A, Plovdiv 4002, Bulgaria
| | - Nikolay Sirakov
- Research Complex for Translational Neuroscience, Medical University of Plovdiv, Bul. Vasil Aprilov 15A, Plovdiv 4002, Bulgaria
- Department of Diagnostic Imaging, Dental Allergology and Physiotherapy, Faculty of Dental Medicine, Medical University Plovdiv, Plovdiv 4000, Bulgaria
| | - Gancho Kostov
- Department of Special Surgery, Medical University Plovdiv, Plovdiv 4000, Bulgaria
| | - Tsvetelina Velikova
- Department of Clinical Immunology, University Hospital Lozenetz, Sofia 1407, Bulgaria
- Department of Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
| | - George Hadjidekov
- Department of Radiology, University Hospital Lozenetz, Sofia 1407, Bulgaria
- Department of Physics, Biophysics and Radiology, Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
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Hadjidekov G, Haynatzki G, Chaveeva P, Nikolov M, Masselli G, Rossi A. Concordance between US and MRI Two-Dimensional Measurement and Volumetric Segmentation in Fetal Ventriculomegaly. Diagnostics (Basel) 2023; 13:diagnostics13061183. [PMID: 36980491 PMCID: PMC10047855 DOI: 10.3390/diagnostics13061183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 03/03/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
We provide a study comparison between two-dimensional measurement and volumetric (3D) segmentation of the lateral ventricles and brain structures in fetuses with isolated and non-isolated ventriculomegaly with 3D virtual organ computer-aided analysis (VOCAL) ultrasonography vs. magnetic resonance imaging (MRI) analyzed with 3D-Slicer software. In this cross-sectional study, 40 fetuses between 20 and 38 gestational weeks with various degrees of ventriculomegaly were included. A total of 71 ventricles were measured with ultrasound (US) and with MRI. A total of 64 sonographic ventricular volumes, 80 ventricular and 40 fetal brain MR volumes were segmented and analyzed using both imaging modalities by three observers. Sizes and volumes of the ventricles and brain parenchyma were independently analyzed by two radiologists, and interobserver correlation of the results with 3D fetal ultrasound data was performed. The semiautomated rotational multiplanar 3D VOCAL technique was performed for ultrasound volumetric measurements. Results were compared to manually extracted ventricular and total brain volumes in 3D-Slicer. Segmentation of fetal brain structures (cerebral and cerebellar hemispheres, brainstem, ventricles) performed independently by two radiologists showed high interobserver agreement. An excellent agreement between VOCAL and MRI volumetric and two-dimensional measurements was established, taking into account the intraclass correlation coefficients (ICC), and a Bland-Altman plot was established. US and MRI are valuable tools for performing fetal brain and ventricular volumetry for clinical prognosis and patient counseling. Our datasets could provide the backbone for further construction of quantitative normative trajectories of fetal intracranial structures and support earlier detection of abnormal brain development and ventriculomegaly, its timing and progression during gestation.
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Affiliation(s)
- George Hadjidekov
- Department of Radiology, University Hospital Lozenetz, Koziak 1 Str., 1407 Sofia, Bulgaria
- Department of Physics, Biophysics and Radiology, Faculty of Medicine, Sofia University "St Kliment Ohridski", 1504 Sofia, Bulgaria
| | - Gleb Haynatzki
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Petya Chaveeva
- Department of Fetal Medicine, Shterev Hospital, 1330 Sofia, Bulgaria
| | - Miroslav Nikolov
- Department of Theoretical Electrical Engineering, Technical University, 1156 Sofia, Bulgaria
| | - Gabriele Masselli
- Radiology Department, Umberto 1 Hospital Sapienza University, 00161 Rome, Italy
| | - Andrea Rossi
- Neuroradiology Unit, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini 5, 16147 Genoa, Italy
- Department of Health Sciences, University of Genoa, 16126 Genoa, Italy
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Evrev D, Sekulovski M, Gulinac M, Dobrev H, Velikova T, Hadjidekov G. Retroperitoneal and abdominal bleeding in anticoagulated COVID-19 hospitalized patients: Case series and brief literature review. World J Clin Cases 2023; 11:1528-1548. [PMID: 36926396 PMCID: PMC10011983 DOI: 10.12998/wjcc.v11.i7.1528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/17/2022] [Accepted: 02/10/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND Hospitalized and severely ill coronavirus disease 2019 (COVID-19) patients necessitate prophylactic or therapeutic anticoagulation to minimize the risk of thrombosis at different sites. Life-threatening bleeding complications include spontaneous iliopsoas hematoma, peritoneal bleeding, and extra-abdominal manifestations such as intracranial hemorrhage.
CASE SUMMARY Bleeding in the abdominal wall results in less severe complications than seen with iliopsoas hematoma or peritoneal bleeding. In our case series of 9 patients, we present retroperitoneal and abdominal bleeding complications following anticoagulation in hospitalized COVID-19 patients with severe acute respiratory syndrome coronavirus 2 pneumonia. Contrast-enhanced computed tomography (CE-CT) is the best imaging modality for assessing hematoma secondary to anticoagulation and determines the therapeutic approach, whether interventional, surgical, or conservative management.
CONCLUSION We present the role of CE-CT for rapid and precise localization of the bleeding site and prognostic counseling. Finally, we provide a brief review of the literature.
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Affiliation(s)
- Delian Evrev
- Department of Cardiac Surgery, University Hospital Lozenetz, Sofia 1407, Bulgaria
- Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
| | - Metodija Sekulovski
- Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
- Department of Anesthesiology and Intensive Care, University Hospital Lozenetz, Sofia 1407, Bulgaria
| | - Milena Gulinac
- Department of General and Clinical Pathology, Medical University of Plovdiv, Plovdiv 6000, Bulgaria
| | - Hristo Dobrev
- Department of Cardiac Surgery, University Hospital Lozenetz, Sofia 1407, Bulgaria
| | - Tsvetelina Velikova
- Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
| | - George Hadjidekov
- Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
- Department of Radiology, University Hospital “Lozenetz”, Kozyak 1 str., Sofia 1407, Bulgaria
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Hadjidekov G, Neykov D. Ileocolic neoplastic intussusception-Imaging role and surgical management: A case report. Acta Radiol Open 2023; 12:20584601231157031. [PMID: 36817180 PMCID: PMC9932948 DOI: 10.1177/20584601231157031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 01/27/2023] [Indexed: 02/17/2023] Open
Abstract
Intussusception refers to invagination of bowel loops into a neighboring, adjacent bowel segment. While it is not an uncommon entity in paediatrics-about 95% of intussusceptions occur in childhood, merely 5% of them affect the adult population. When affecting the later typically the small intestine is engaged rather than the colon. The diagnosis often represents with unspecific symptoms and is rarely considered a possibility in adults. In the past the diagnosis was typically made intraoperatively. As the Multi-Detector Computed Tomography (MDCT) of the abdomen became a referral diagnostic method, recognizing the signs of the condition is very important since some of the cases are transient, while others have an underlying malignant cause and more aggressive treatment is required. Surgical treatment planning is mandatory in those neoplastic complicated cases. The presented case report describes the role of radiology and the surgical treatment of a malignant ileocolic intussusception.
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Affiliation(s)
- George Hadjidekov
- Department of Radiology,
Lozenetz
University Hospital, Sofia,
Bulgaria,Department of Physics, Biophysics
and Radiology, Medical Faculty, Sofia University
“St.Kl.Ohridski”, Sofia, Bulgaria,George Hadjidekov, Department of Radiology,
Lozenetz University Hospital, Koziak 1 str., Sofia 1000, Bulgaria.
| | - Dimitar Neykov
- Department of Radiology,
Lozenetz
University Hospital, Sofia,
Bulgaria,Department of Physics, Biophysics
and Radiology, Medical Faculty, Sofia University
“St.Kl.Ohridski”, Sofia, Bulgaria
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Ricquart Wandaele A, Kastler A, Comte A, Hadjidekov G, Kechidi R, Helenon O, Kastler B. CT-guided infiltration of greater occipital nerve for refractory craniofacial pain syndromes other than occipital neuralgia. Diagn Interv Imaging 2020; 101:643-648. [DOI: 10.1016/j.diii.2020.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/23/2020] [Accepted: 05/05/2020] [Indexed: 12/30/2022]
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Andonova S, Robeva R, Vazharova R, Ledig S, Grozdanova L, Stefanova E, Bradinova I, Todorov T, Hadjidekov G, Sirakov M, Wieacker P, Kumanov P, Savov A. New Territory for an Old Disease: 5-Alpha-Reductase Type 2 Deficiency in Bulgaria. Sex Dev 2017; 11:21-28. [PMID: 28110336 DOI: 10.1159/000454974] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2016] [Indexed: 11/19/2022] Open
Abstract
Disorders/differences of sexual development (DSD) are a group of conditions, some of which can be clinically indistinguishable mainly due to their phenotypic variability. Defining the molecular basis of their wide spectrum is still in progress. The diagnosis of 5-alpha-reductase type 2 (5α-reductase-2) deficiency is difficult especially in newborns and pre-pubertal individuals, and as a result its frequency might be underestimated. In the present study, we describe the clinical characteristics and molecular defects in 3 nonrelated 5α-reductase-2 deficiency patients of Bulgarian descent. Sequencing analysis revealed the mutations p.Y188CfsX9 and p.G196S, and MLPA analysis showed a deletion of exon 1 in the SRD5A2 gene. The observed genetic substitutions were not detected in 76 additionally screened unrelated controls, but a heterozygous healthy carrier of the p.R171S mutation was found. This is the first study on the molecular basis of 5α-reductase-2 deficiency in Bulgaria. It suggests that the carrier frequency of mutations in the SRD5A2 gene might be noteworthy worldwide. There is no correlation between cultural aspects, location, and/or population size and the number of different mutations in SRD5A2 detected, and more efforts should be made to determine the prevalence of this condition in different geographic areas. Our study supports the importance of genetic testing in 46,XY DSD patients, especially in countries or regions where 5α-reductase-2 deficiency has not been reported so far.
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Affiliation(s)
- Silvia Andonova
- National Genetic Laboratory, UHOG "Maichin dom", Medical University, Sofia, Bulgaria
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Brown LAE, Thomas K, Reskovic Luksic V, Bernard AB, Montilla Padilla I, Savelev A, Tufaro V, Nossikoff A, Ingimarsdottir IJ, Almeida Morais L, Meel R, Surkova E, Moharem-Elgamal S, Macabeo RAM, Cueva Recalde JF, Teixeira R, Petrovic M, Mahmoud HM, Lavanco V, De Kleijn MC, Vertes V, Kozan H, Padron-Encalada R, Zheng AW, Main SE, Jancis RSC, Steadman CD, Carpenter JP, Senaratne DNS, Townsend C, Wheeler S, Jacobson I, Elkington A, Balkhausen K, Bull S, Ljubas Macek J, Pasalic M, Ostojic Z, Matasic R, Veceric S, Separovic Hanzevacki J, Martinez C, Dulgheru RE, Reskovic V, Lancellotti P, Jimenez Lopez-Guarch C, Velazquez Martin M, Nuche Berenguer J, Jimenez J, Solis J, Alonso S, Lopez Gude MJ, Perez Vela JL, Escribano Subias P, Tregubov AV, Shubik YV, Bandera F, Generati G, Alfonzetti E, Guazzi M, Evrev D, Razboynikov R, Atanasova A, Angelov K, Lazarova G, Radkova M, Stamboliyski G, Simova I, Kalionsky R, Hadjidekov G, Plachkov I, Petkov R, Gatzov P, Donova T, Hellgren Johansson L, Flachskampf FA, Galrinho A, Moura Branco L, Abreu J, Timoteo AT, Pinto-Teixeira P, Aguiar-Rosa S, Rio P, Portugal G, Cruz-Ferreira R, Nethononda R, Peters F, Libhaber E, Essop MR, Bidviene J, Brunello G, Veronesi F, Cavalli G, Cherata D, Romeo G, Badano LP, Muraru D, Tawfik M, Samir R, Amin M, Abol Maaty M, Pestano NSP, Estanislao IHE, Gayan Ordas J, Lacambra I, Pelegrin Diaz J, Dinis P, Monteiro R, Santos M, Botelho A, Quintal N, Goncalves L, Giga V, Boskovic N, Rakocevic I, Trifunovic D, Aleksandric S, Tesic M, Dobric M, Nedeljkovic I, Beleslin B, Djordjevic-Dikic A, Stepanovic J, Hassan M, Nagy M, Samaan A, Kharabish A, Philip P, Wagdy K, Elmaghawry M, Elguindy A, Yacoub M, Leo AL, Pasotti E, Faletra FF, Moccetti T, Houthuizen P, Bracke FALE, Lopata RGP, Nogradi A, Porpaczy A, Minier T, Czirjak L, Komocsi A, Faludi R, Sade LE, Turgay O, Pirat B, Muderrisoglu H, Barreiro-Perez M, Diaz-Pelaez E, Martin-Garcia A, Cruz-Gonzalez I, Jimenez-Candil J, Sanchez PL. HIT Poster session 3P915Direct access to transthoracic echocardiography in a district general hospital: are referrals appropriate?P916Surveillance echocardiography for valve disease; have the AHA valve guidelines translated in clinical practice? A retrospective study from a large general hospital in the United KingdomP917Effects of immediate echo guided AV and VV CRT optimization on left ventricular function and hemodynamicsP9183D echocardiography estimation of ventricular performance : correlation between 3D strain and elastancesP919 Right ventricular reverse remodeling after balloon pulmonary angioplasty in patients with non operable chronic thromboembolic pulmonary hypertensionP920Pseudonormal and restrictive left ventricular filling patterns are associated with lower effectiveness of pulmonary vein isolation in patients with paroxysmal atrial fibrillationP921Impact of new guidelines on diastolic dysfunction classification of HFrEF patients and correlation with cardiopulmonary exercise test functional parametersP922Prevalence of proximal DVT on compression ultrasound in patients with acute pulmonary embolism and it's diagnostic utility as a rule-in point-of-care testP923Preoperative aortic annulus size assessment by transthoracic echocardiography compared to the size of surgically implanted aortic prosthesesP924New insights into the mechanics of left ventricular systolic and diastolic function in severe aortic stenosisP925Comparison of cardiac magnetic resonance and echocardiography for evaluation of mitral regurgitation severity in patients with rheumatic heart diseaseP926Tricuspid annulus remodeling in patients with permanent atrial fibrillation and functional tricuspid regurgitationP927Assessment of ventricular electromechanical dyssynchrony in CRT candidatesP928Native aortic valve infective endocarditis due to streptococcus sanguinis in a patient with possible behcets disease, patent foramen ovale and thymomaP929GLS is associated with conduction abnormalities in patients with type 1-myotonic dystrophyP930Descending aortic mechanics and stroke: a two-dimensional echocardiographic speckle tracking studyP931Correlation between prognostic markers of stress echocardiography and angiographic severity of coronary artery disease in patients after primary PCIP932A novel method for calculating the mitral valve area in patients with rheumatic mitral stenosisP933Three dimensional printing of cardiac anatomical structures from three dimensional echocardiograpfic images: preliminary experienceP934Reliability of fully automated calculation of global longitudinal strain by commercially available software: implications for daily practiceP935Global longitudinal strain is a suitable tool to unmask the subclinical left ventricular dysfunction in patients with systemic sclerosisP936Concomitant use of echocardiographic strain analysis and treadmill stress testing to predict coronary artery diseaseP937Cardiac-CT and transoesophageal echocardiography comparison for left atrial appendage clots detection in patients referred for left atrial interventional procedures. Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kastler A, Alnassan H, Hadjidekov G, Aubry S, Kastler B. Microwave ablation of spinal and paraspinal tumors: initial experience in 10 procedures. J Vasc Interv Radiol 2013. [DOI: 10.1016/j.jvir.2013.01.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Guergueltcheva V, Peeters K, Baets J, Ceuterick-de Groote C, Martin J, Suls A, Vriendt E, Mihaylova V, Chamova T, Almeida-Souza L, Ydens E, Tzekov C, Hadjidekov G, Gospodinova M, Storm K, Reyniers E, Bichev S, van der Ven P, Furst D, Mitev V, Lochmuller H, Timmerman V, Tournev I, De Jonghe P, Jordanova A. G.O.7 Distal myopathy with upper limb predominance caused by filamin C haploinsufficiency. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Guergueltcheva V, Peeters K, Baets J, Ceuterick-de Groote C, Martin JJ, Suls A, De Vriendt E, Mihaylova V, Chamova T, Almeida-Souza L, Ydens E, Tzekov C, Hadjidekov G, Gospodinova M, Storm K, Reyniers E, Bichev S, van der Ven PFM, Fürst DO, Mitev V, Lochmüller H, Timmerman V, Tournev I, De Jonghe P, Jordanova A. Distal myopathy with upper limb predominance caused by filamin C haploinsufficiency. Neurology 2011; 77:2105-14. [PMID: 22131542 DOI: 10.1212/wnl.0b013e31823dc51e] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE In this study, we investigated the detailed clinical findings and underlying genetic defect in 3 presumably related Bulgarian families displaying dominantly transmitted adult onset distal myopathy with upper limb predominance. METHODS We performed neurologic, electrophysiologic, radiologic, and histopathologic analyses of 13 patients and 13 at-risk but asymptomatic individuals from 3 generations. Genome-wide parametric linkage analysis was followed by bidirectional sequencing of the filamin C (FLNC) gene. We characterized the identified nonsense mutation at cDNA and protein level. RESULTS Based on clinical findings, no known myopathy subtype was implicated in our distal myopathy patients. Light microscopic analysis of affected muscle tissue showed no specific hallmarks; however, the electron microscopy revealed changes compatible with myofibrillar myopathy. Linkage studies delineated a 9.76 Mb region on chromosome 7q22.1-q35 containing filamin C (FLNC), a gene previously associated with myofibrillar myopathy. Mutation analysis revealed a novel c.5160delC frameshift deletion in all patients of the 3 families. The mutation results in a premature stop codon (p.Phe1720LeufsX63) that triggers nonsense-mediated mRNA decay. FLNC transcript levels were reduced in muscle and lymphoblast cells from affected subjects and partial loss of FLNC in muscle tissue was confirmed by protein analysis. CONCLUSIONS The FLNC mutation that we identified is distinct in terms of the associated phenotype, muscle morphology, and underlying molecular mechanism, thus extending the currently recognized clinical and genetic spectrum of filaminopathies. We conclude that filamin C is a dosage-sensitive gene and that FLNC haploinsufficiency can cause a specific type of myopathy in humans.
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Affiliation(s)
- V Guergueltcheva
- Department of Neurology, Medical University-Sofia, Sofia, Bulgaria
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Tomizawa A, Hadjidekov G, Ishii I, Bakalova R, Zhelev Z, Aoki I, Saga T, Kitada M. Nitroxide derivatives for imaging of hypercholesterolemia-induced kidney dysfunction and assessing the effectiveness of antilipidemic drugs. Mol Pharm 2011; 8:1962-9. [PMID: 21744874 DOI: 10.1021/mp200087v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The present study was designed to clarify the possibility for application of nitroxide derivatives in magnetic resonance imaging (MRI) of hypercholesterolemia-mediated renal dysfunction in mice, as well as to assess the effectiveness of antilipidemic drugs (cholestyramine and ezetimibe). The mice were separated in four groups: (i) on a normal diet (ND) without medication (control); (ii) on a high cholesterol diet (CD) without medication; (iii) CD mice receiving cholestyramine; and (iv) CD mice receiving ezetimibe. In CD mice without medication, a hypercholesterolemia was developed, detected by the increasing of total plasma cholesterol and non-HDL cholesterol, and decreasing of HDL cholesterol. The hypercholesterolemia compromised renal function: blood urea nitrogen, creatine and uric acid increased significantly, accompanied with development of glomerulosclerosis, enhancement of the amount of neutrophils and overexpression of metalloproteinase-9. The mice were subjected to anesthesia and MR imaging was performed on 7 T magnet (T1-weighted incoherent gradient-echo sequence; fast low-angle shot). The region-of-interest was selected within the kidney. The images were obtained before and after injection of contrast probe [carbamoyl-PROXYL (CMP) or Gd-DTPA]. In the kidney of ND mice, the MRI signal intensity increased after injection of CMP, reached a maximum (very well-defined renal filtration peak) and decreased to the baseline level within 14 min. In kidney of CD mice, the CMP-mediated enhancement of MRI signal was not detected. Antilipidemic drugs patially abolished the effect of hypercholesterolemia on CMP-enhanced MRI in the kidney. The kinetic curves of Gd-enhanced MRI signal had also different profiles in the kidney of ND and CD mice. They were similar to the profiles of the kinetic curves, obtained from MR urography of healthy human and human with renal pathology, respectively. The present study suggests that CMP is a suitable MRI contrast probe for visualization of hypercholesterolemia-induced renal dysfunction in intact animals and the assessment of the efficacy of antilipidemic drugs. The probe was applied at a concentration that was 3 times lower than the LD50 for intravenous administration in mice. Since the probe is excreted by the kidney, it could be considered harmless for mammalians in the selected dose and appropriate candidate for translational research.
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Affiliation(s)
- Atsuyuki Tomizawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan
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Hristova R, Hadjidekov G. [Diagnostic and clinical behaviour with Tarlov cyst in gynaecology practice]. Akush Ginekol (Sofiia) 2011; 50 Suppl 2:49-51. [PMID: 22524142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The following presents cases from the gynaecological practice which resulted in a surgical intervention due to the detection of cystic formations of origin out of the reproductive system. Although rare, Tarlov cyst has its place in the differential diagnostic plan of ovarian formations. MRI scan remains an alternative to the ultrasound imagery and is the main diagnostic method for obtaining the right diagnosis. This further aids the set of actions appropriate with patients suffering from Tarlov cyst. Thus, unnecessary abdominal surgical interventions are not to be undertaken.
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Mercky N, Lerais JM, Hadjidekov G, Laborie L, Sarliève P, Kastler B. [Rupture of a mucoid cyst of the posterior cruciate ligament: a case report]. J Radiol 2007; 88:1721-1723. [PMID: 18065933 DOI: 10.1016/s0221-0363(07)74052-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- N Mercky
- Service de Radiologie A et C, CHU Jean Minjoz, 3, bd Fleming, 25000 Besançon.
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Kastler B, Jacamon M, Aubry S, Barral FG, Hadjidekov G, Sarliève P, Saguet O, Lerais JM, Cadel G, Kovacs R, Boulahdour H, Pereira P. Radiofréquence bipolaire et cimentoplastie dans le traitement des métastases osseuses. ACTA ACUST UNITED AC 2007; 88:1242-7. [PMID: 17878869 DOI: 10.1016/s0221-0363(07)91333-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Bone metastases are the most common cause of pain in cancer patients. Pain management in cancer patients, often revealing the disease and always present at advanced stages, is an important and difficult task. Pain is not always properly controlled by high doses of specific medication, radiation therapy or chemotherapy. When these therapies do not provide adequate pain relief, percutaneous neurolysis, infiltrations, alcoholizations and cementoplasty may be considered. More recently RF ablation has been proposed. On weight-bearing bones, RF can be combined with acrylic cement injection. The authors present here this very effective new technique which is complementary to classical pain management techniques.
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Affiliation(s)
- B Kastler
- Service de Radiologie A, Hôpital Jean Minjoz, Boulevard Fleming, 25030 Besançon.
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15
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Kastler B, Barral FG, Sarlieve P, Aubry S, Jacamon M, Hadjidekov G, Lerais JM, Boulahdour Z, Sailley N, Laborie L, Cadel G, Puget J, Kovacs R, Michalakis D, Haj Hussein H, Litzler JF, Manzoni P, De Billy M, Tiberghien F, Braun M, Blum A, Boulahdour H, Aubry R, Fergane B. Nouvelles techniques interventionnelles radiologiques dans le traitement des douleurs d’origine cancéreuse: infiltration, alcoolisation, vertébroplastie, cimentoplastie, radiofréquence bipolaire Algoradiologie interventionnelle de la douleur cancéreuse. ACTA ACUST UNITED AC 2007. [DOI: 10.1007/s11724-007-0032-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Hadjidekov G, Kirova G, Minkov M, Hadjidekova S, Vlassov V. [Imaging diagnosis of hermaphroditism in a 3-month-old child]. J Radiol 2007; 88:80-3. [PMID: 17299374 DOI: 10.1016/s0221-0363(07)89796-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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17
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Kirova GI, Velchev V, Hinkov G, Hadjidekov V, Hadjidekov G. Right ventricular echinococcosis followed by hydatid pulmonary embolism. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1571-4675(03)00107-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Tachev T, Hadjidekov G, Nedkova-Bratanova N, Yanev S. [Radiologic changes in allergic enteropathy]. Acta Gastroenterol Belg 1967; 30:209-24. [PMID: 5614324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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