Miroslav Solař, Ján Žižka, Antonı́n Krajina, A. Michl, Jan Raupach, Ľudovít Klzo, Pavel Ryška, Jiří Ceral,
Objective : The aim of our study was to evaluate duplex ultrasonography (DUS) and magnetic resonance angiography (MRA) in detection of haemodynamically significant renal artery stenosis (RAS). Methods : The study included patients with high clinical suspicion of renovascular hypertension (RVH). The imaging of renal arteries was performed by DUS, MRA and digital subtraction angiography (DSA). Significant RAS was defined as maximum systolic velocity ≥ 180 cm/sec (DUS) or as 60% reduction of the endoluminal arterial ...
Tópico(s): Pediatric Urology and Nephrology Studies
2011 - Nakladatelství Karolinum | Acta Medica (Hradec Kralove Czech Republic)
Ján Žižka, P Eliáš, A. Michl, Jan Harrer, Tomáš Česák, Amir Herman,
Tópico(s): Cervical and Thoracic Myelopathy
2001 - Springer Science+Business Media | European Radiology
Vera Zizka, Jan Koschorreck, Collins C. Khan, Jonas J. Astrin,
Abstract Human-induced biodiversity loss and changes in community composition are major challenges of the present time, urgently calling for comprehensive biomonitoring approaches to understand system dynamics and to inform policy-making. In this regard, molecular methods are increasingly applied. They provide tools for fast and high-resolution biodiversity assessments and can also focus on population dynamics or functional diversity. If samples are stored under appropriate conditions, this will ...
Tópico(s): Identification and Quantification in Food
2022 - Springer Science+Business Media | Environmental Sciences Europe
František Dařena, Ján Žižka, Jan Přichystal,
Measuring the quality of products or services, a challenging task is to reveal clients' satisfaction or sentiment. As people have many opportunities to express their opinions using various on-line channels (e.g., discussions, microblogs, social networks), the question is whether such data might be used for this purpose. Information hidden in the data includes the reasons why people perceive products or services as good or bad, what are the reasons of clients' satisfaction or dissatisfaction, or what ...
Tópico(s): Text and Document Classification Technologies
2014 - Elsevier BV | Procedia Economics and Finance
Manuela Vaněčková, M. Heřman, Martin P. Smith, Marek Mechl, K R Maravilla, J. Weichet, Maria Vittoria Spampinato, Ján Žižka, Franz J. Wippold, J. J. Baima, R W Babbel, Eva Bültmann, Raymond Y. Huang, Jan‐Hendrik Buhk, Alain Bonafé, C. Colosimo, Su Lui, Miles A. Kirchin, Ningyan Shen, G Pirovano, Alberto Spinazzi,
BACKGROUND AND PURPOSE: Gadobenate dimeglumine (MultiHance) has higher r1 relaxivity than gadoterate meglumine (Dotarem) which may permit the use of lower doses for MR imaging applications. Our aim was to compare 0.1- and 0.05-mmol/kg body weight gadobenate with 0.1-mmol/kg body weight gadoterate for MR imaging assessment of brain tumors. MATERIALS AND METHODS: We performed crossover, intraindividual comparison of 0.1-mmol/kg gadobenate with 0.1-mmol/kg gadoterate (Arm 1) and 0.05-mmol/kg gadobenate with 0.1- ...
Tópico(s): Medical Imaging Techniques and Applications
2015 - American Society of Neuroradiology | American Journal of Neuroradiology
Pavel Ryška, Ondřej Slezák, Anders Eklund, Jan Malm, Jonatan Salzer, Ján Žižka,
Abstract Purpose Numerous radiological measures have been proposed as imaging biomarkers of idiopathic normal pressure hydrocephalus (iNPH), however, the number of studies systematically comparing their diagnostic values remains limited. The study objective was to compare the diagnostic performance of fifteen cross-sectional imaging iNPH biomarkers. Materials and methods Eighty subjects were prospectively enrolled in the study: 35 subjects with clinically confirmed iNPH and 45 matched healthy controls (HC). ...
Tópico(s): Spinal Dysraphism and Malformations
2019 - Elsevier BV | Journal of the Neurological Sciences
K R Maravilla, Martin P. Smith, Josef Vymazal, Mayank Goyal, M. Heřman, J. J. Baima, R W Babbel, Manuela Vaněčková, Ján Žižka, Cesare Colosimo, Małgorzata Urbańczyk–Zawadzka, Marek Mechl, Asim K. Bag, Stefano Bastianello, Eva Bueltmann, Toshinori Hirai, T. Frattini, Miles A. Kirchin, G Pirovano,
BACKGROUND AND PURPOSE: Gadobutrol (Gadavist) and gadoteridol (ProHance) have similar macrocyclic molecular structures, but gadobutrol is formulated at a 2-fold higher (1 mol/L versus 0.5 mol/L) concentration. We sought to determine whether this difference impacts morphologic contrast-enhanced MR imaging. MATERIALS AND METHODS: Two hundred twenty-nine adult patients with suspected or known brain tumors underwent two 1.5T MR imaging examinations with gadoteridol or gadobutrol administered in randomized order ...
Tópico(s): Advanced MRI Techniques and Applications
2014 - American Society of Neuroradiology | American Journal of Neuroradiology
Martin Doležel, Karel Odrážka, Ján Žižka, J Vaňásek, Tereza Kohlová, Tomas Kroulik, Dusan Spitzer, Pavel Ryška, Michal Tichý, Milan Kostal, Lubica Jalcova,
Purpose Magnetic resonance imaging (MRI)-assisted radiation treatment planning enables enhanced target contouring. The purpose of this study is to analyze the feasibility and accuracy of computed tomography (CT) and MRI data fusion for MRI-based treatment planning in an institution where an MRI scanner is not available in the radiotherapy department. Methods and Materials The registration inaccuracy of applicators and soft tissue was assessed in 42 applications with CT/MRI data fusion. The absolute ...
Tópico(s): Management of metastatic bone disease
2012 - Elsevier BV | International Journal of Radiation Oncology*Biology*Physics
David C. Wyld, Ján Žižka, Dhinaharan Nagamalai,
The International conference series on Computer Science, Engineering & Applications (ICCSEA) aims to bring together researchers and practitioners from academia and industry to focus on understanding c
2012 - Springer Nature | Advances in intelligent systems and computing
Martin Doležel, Karel Odrážka, J Vaňásek, Tereza Kohlová, Tomas Kroulik, K Kudelka, D. Spitzer, Milan Mrklovský, Michal Tichý, Ján Žižka, Lubica Jalcova,
Objective: The aim of this study was to analyse the feasibility and determine the benefits of MRI-based pre-planning with CT/MRI data fusion in patients with cervical cancer treated with radical radiotherapy. Methods: Patients underwent MRI examination prior to external beam radiotherapy and prior to the first and fourth fraction of brachytherapy with applicators in place. Insertion of applicators at the radiology department was performed under paracervical anaesthesia. The benefit of MRI pre-planning ...
Tópico(s): Advanced Radiotherapy Techniques
2011 - Wiley | British Journal of Radiology
R. Lodinová‐Žádníková, L. Prokešová, Ingrid Kocourková, Jiří Hrdý, Ján Žižka,
<i>Background:</i> The objective is to study the effect of after-birth oral colonization by a probiotic <i>Escherichia coli </i>strain in infants of allergic mothers to reduce occurrence of allergy later in life. <i>Methods:</i> In a controlled clinical trial, 158 infants were randomly divided into groups of (i) 56 colonized infants of allergic mothers, (ii) 57 control infants of allergic mothers, and (iii) 45 control infants of healthy mothers. Incidence rates of bacterial pathogens ...
Tópico(s): Pediatric health and respiratory diseases
2010 - Karger Publishers | International Archives of Allergy and Immunology
Jiří Hrdý, Peter Zanvit, Olga Novotná, Ingrid Kocourková, Ján Žižka, L. Prokešová,
Tópico(s): Dermatology and Skin Diseases
2010 - Springer Science+Business Media | Folia Microbiologica
Ingrid Kocourková, R. Žádníková, Ján Žižka, V. Rosová,
Tópico(s): Pediatric health and respiratory diseases
2007 - Springer Science+Business Media | Folia Microbiologica
Ján Žižka, Jiří Hrdý, R. Lodinová‐Žádníková, Ingrid Kocourková, Olga Novotná, I Šterzl, L. Prokešová,
Maternal milk has beneficial effects on the development and function of the newborn's immune system. Whether the milk of allergic mother has the same effects as the milk of healthy mothers is not yet quite clear. To contribute to the characterization of its immunomodulatory action, we tested the effect of milk of healthy and allergic mothers on the proliferation and immunoglobulin formation in cultures of cord blood mononuclear leucocytes (CBML) of newborns of healthy and allergic mothers. CBML proliferation ...
Tópico(s): Infant Health and Development
2007 - Wiley | Pediatric Allergy and Immunology
Ján Žižka, Miloslav Kverka, Olga Novotná, I. Staňková, R. Lodinová‐Žádníková, Ingrid Kocourková, I Šterzl, L. Prokešová,
Tópico(s): Pediatric health and respiratory diseases
2007 - Springer Science+Business Media | Folia Microbiologica
Ján Žižka, Ľudovít Klzo, Jiří Ferda, Milan Mrklovský, Josef Bukač,
To prospectively compare contrast properties of extracelullar (gadobutrol) and hepatospecific (gadoxetic acid) contrast agents in upper abdominal MRI studies.Standardized (0.1 ml/kg) dose of gadobutrol (56 subjects) and gadoxetic acid (51 subjects) was administered intravenously by MRI-compatible injector at 2 ml/s, followed by 20 ml saline flush. MR signal intensity changes (SIC) between precontrast scans and arterial phase, portal venous phase, equilibrium, and delayed scans at 10 and 20 min were measured ...
Tópico(s): Advanced MRI Techniques and Applications
2007 - Elsevier BV | European Journal of Radiology
Leoš Ungermann, Pavel Eliás̆, Ján Žižka, Pavel Ryška, Luděk Klzo,
To evaluate the prevalence of spoke-wheel pattern and typical symptoms of focal nodular hyperplasia (FNH) by means of dynamic contrast-enhanced ultrasonography (CEUS) in relation to lesion size.Twenty-eight patients were included in the trial, in whom, based on the CEUS, we raised suspicion of hypervascularized liver lesion; there were 30 lesions altogether. The final diagnosis of FNH was verified by means of CT, MRI or lesion biopsy. Majority of patients (26) were females, compared to 2 male, with ...
Tópico(s): Pancreatic and Hepatic Oncology Research
2007 - Elsevier BV | European Journal of Radiology
L. Prokešová, R. Lodinová‐Žádníková, Ján Žižka, Ingrid Kocourková, Olga Novotná, Petra Petrásková, I Šterzl,
To assess the regulatory changes of immune system in children genetically pre‐disposed to allergic diseases and in their mothers, we tested cytokines IL‐4, IL‐5, IL‐6, IL‐10, IL‐13, IFN‐ γ and TGF‐ β in 21 healthy and 21 allergic mothers (serum at the time of delivery, colostrum and milk throughout the suckling period) and their children (cord blood, venous blood and stool filtrates) up to 1 yr of age. Samples were taken at the time of delivery, 4 days post‐partum and then after 3, 6 and 12 months. ...
Tópico(s): Pediatric health and respiratory diseases
2006 - Wiley | Pediatric Allergy and Immunology
Ján Žižka, Pavel Eliás̆, Karel Hodík, Jaroslav Tintěra, V Jüttnerová, Z Bĕlobrádek, Ľudovít Klzo,
Tópico(s): Neonatal and fetal brain pathology
2006 - Springer Science+Business Media | Pediatric Radiology
Ján Žižka, Jiří Ceral, Pavel Eliás̆, Jaroslav Tintěra, Ľudovít Klzo, Miroslav Solař, Libor Straka,
To prospectively evaluate prevalence of neurovascular contacts (NVCs) at the rostral medulla oblongata in normotensive and hypertensive subjects.Forty-three patients with severe essential hypertension and 45 normotensive subjects were matched for age, sex, and body mass index. Magnetic resonance (MR) imaging included transverse and coronal T2-weighted turbo spin-echo (section thickness, 3.0 mm), transverse three-dimensional (3D) time-of-flight MR angiographic (section thickness, 0.8 mm), and 3D constructive ...
Tópico(s): Neurosurgical Procedures and Complications
2004 - Radiological Society of North America | Radiology
P Eliáš, Ján Žižka, P Balícek,
Abstract We report an unusual case of the complete Currarino triad diagnosed in a fetus at 21 weeks' gestation by means of prenatal ultrasonography (US). The highly suspicious findings in the fetus were accompanied by analogous US findings in the mother who suffered from mild symptoms of up to that time unrecognized Currarino triad. Consecutively, magnetic resonance imaging (MRI) confirmed the findings simultaneously in the fetus and in her mother. This is the first report describing the prenatal ...
Tópico(s): Esophageal and GI Pathology
2002 - Wiley | Prenatal Diagnosis
Ján Žižka, Pavel Eliás̆, Antonı́n Krajina, A. Michl, Miroslav Lojík, Pavel Ryška, Jana Mašková, P Hůlek, Václav Šafka, Tomáš Vaňásek, Josef Bukac̆,
OBJECTIVE. The purpose of the study was to evaluate the long-term clinical efficacy of Doppler sonography in revealing failure of transjugular intrahepatic portosystemic shunts (TIPS).
Tópico(s): Organ Transplantation Techniques and Outcomes
2000 - American Roentgen Ray Society | American Journal of Roentgenology
Ján Žižka, J. Charvat, A Baxová, P Balícek, K Kozłowski,
We present two sibs with a distinctive phenotype and with stippled calcifications of the tarsal bones and sacro-coccygeal spine. They represent an apparently “new” form of chondrodysplasia punctata. Am. J. Med. Genet. 76:213–216, 1998. © 1998 Wiley-Liss, Inc.
Tópico(s): MicroRNA in disease regulation
1998 - Wiley | American Journal of Medical Genetics
A Ferko, A. Krajima, Bohumil Jon, Michal Leško, Z Voboril, Ján Žižka, P Eliáš,
Tópico(s): Vascular Procedures and Complications
1997 - Springer Science+Business Media | European Radiology
D. Isfan, Ján Žižka, A. D'Avignon, M. Deschênes,
Abstract Nitrogen (N) fertilizer is a key factor of yield increase but also an environmental pollution hazard. The sustainable agriculture system should have an acceptable level of productivity and profitability and an adequate environmental protection. The objectives of this study were to determine the relationships between N rate, DM yield, plant N concentration (NC) and residual soil nitrate‐nitrogen in order to improve the predicted N rate in corn (Zea mays L.) silage. The experiment was conducted ...
Tópico(s): Wheat and Barley Genetics and Pathology
1995 - Taylor & Francis | Communications in Soil Science and Plant Analysis
Abstract The 0.02M strontium chloride (SrCl2) and 0.05M citric acid solution (Sr‐citrate) was developed for the simultaneous determination of availability indices for plant nutrients from soils. The objective of this study was to compare the Sr‐citrate extracting solution with water, 0.002M SrCl2, 0.1M barium chloride (BaCl2), 0.1M hydrochloric acid (HCl), 1M ammonium acetate (NH4OAc), and Mehlich 3 soil extractants as predictors of plant‐available potassium (K) for alfalfa (Medicago sativa L.) in the ...
Tópico(s): Soil and Unsaturated Flow
1994 - Taylor & Francis | Communications in Soil Science and Plant Analysis
R. R. Simard, Ján Žižka, C. R. DE KIMPE,
The development of integrated soil fertility programs will involve the consideration of mineralogical and taxonomical classifications of soils. The objective of this work was to investigate K and Mg release from silt and clay fractions of four Québec soils. All soils were characterized by a mixed clay mineralogical composition; feldspars and quartz dominated the silt and vermiculite and hydrous micas the clay fractions. Fifteen sequential extractions with 5 × 10−4 M citric acid, through a period of ...
Tópico(s): Soil Carbon and Nitrogen Dynamics
1992 - Wiley | Soil Science Society of America Journal
R. R. Simard, Ján Žižka, T. Sen Tran,
The 0.02 M SrCl2-0.05 M citric acid solution (Sr-citrate) was developed for the simultaneous determination of availability indices for P and other plant nutrients from soils. The objective of this study was to compare the Sr-citrate extracting solution with the water, NaHCO3, Bray 1, Bray 2, Mehlich 3, and 0.1 M HCl soil tests as extractants for soil P, and as predictors of plant-available P for oat (Avena sativa L.) and corn (Zea mays L.) in the glasshouse. The Srcitrate solution extracted more P ...
Tópico(s): Soil Carbon and Nitrogen Dynamics
1991 - Wiley | Soil Science Society of America Journal
R. R. Simard, T. Sen Tran, Ján Žižka,
Tópico(s): Electrokinetic Soil Remediation Techniques
1991 - Springer Science+Business Media | Plant and Soil
R. R. Simard, Ján Žižka, C. R. DE KIMPE,
The understanding of the kinetics of K uptake by plants is necessary for the development of predictive models aimed at optimum fertilizer use and crop yields. The objective of this work was to study the kinetics of K uptake by alfalfa, in a long-term growth chamber experiment (366 d), on 30 soils from Quebec. The soils varied in mineralogical composition and by the amounts of available K in soluble, rapidly and slowly exchangeable forms. In 28 of the 30 soils, a minimal, steady-state level of NH ...
Tópico(s): Plant nutrient uptake and metabolism
1990 - Canadian Science Publishing | Canadian Journal of Soil Science