Application of Intravoxel Incoherent Motion (IVIM) Model for Differentiation Between Metastatic and Non-Metastatic Head and Neck Lymph Nodes.

Background: Application of intravoxel incoherent motion (IVIM) model parameters, including: true diffusion (D), pseudodiffusion (D*), and perfusion fraction (F), for differentiation between metastatic and non-metastatic head and neck lymph nodes.

Material/methods: Diffusion-weighted images/apparent diffusion coefficient (DWI/ADC) images of 86 lymph nodes from 31 cancer patients were analyzed. DWI images were obtained with a 1.

Stem cells as therapy for cardiac disease - a review.

Acute myocardial infarction (AMI) is one of the most significant causes of morbidity and mortality worldwide. Stem cells represent an enormous chance to rebuild damaged heart tissue. Correct definition of the cardiac progenitors is necessary to understand heart development, and would pave the way for the use of cardiac progenitors in the treatment of heart disease.

[Use of adipose tissue as a source of mesenchymal stem cells].

Enormous expectations are associated with stem cells with regard to cell therapy and tissue engineering. Stem cells have unlimited potential for self-renewal and develop into various cell types. For the mesodermal tissue engineering such a source of cells is the bone marrow stroma.

[Natural factors influencing sleep].

Sleep is a universal phenomenon of human and animal lives, although the importance of sleep for homeo-stasis is still unknown. Sleep disturbances influence many behavioral and physiologic processes, leading to health complications including death. On the other hand, sleep improvement can beneficially influence the course of healing of many disorders and can be a prognostic of health recovery.

[Usefulness of FDG-PET for the diagnosis of brain tumors].

Although magnetic resonance imaging (MRI) and X-ray computed tomography (CT) are the two imaging modalities used conventionally for the morphological OUN imaging, there are many cases for positron emission tomography (PET) diagnostic. Basal radiopharmaceutic used in PET is a 18F-2-Fluoro-2-deoxy-D-glucose (18FDG). Use of PET imaging provides in vivo biochemical and physiological data and therefore can provide unique functional information about tumors compared to histological or anatomic neuroradiological methods.

Effects of amphetamine on NK-related cytotoxicity in rats differing in locomotor reactivity and social position.

The effect of i.p. administration of 1mg/kg of amphetamine (AMPH) on natural killer cells cytotoxicity (NKCC) and number of large granular lymphocytes (LGL-NK) together with plasma corticosterone (CORT) level and WBC was evaluated in male Wistar rats differing in two behavioral features: locomotor reactivity to novelty (high, HR and low, LR responders) and social position (dominants, D and subordinates, S).

Influence of small mechanical head injuries on peripheral blood natural killer cytotoxicity (NKCC) in rats.

Many neurophysiological experiments and some human's brain tissue stimulatory therapies require surgery intervention, which results in small mechanical skull and brain tissue injuries. Additionally, these procedures need some local or short general anaesthesia, which is not neutral for immune system action. Clinical data unambiguously shows that severe head and brain injuries and anaesthesia can suppress immunity.

Effect on peripheral blood natural killer cytotoxic cell activity in rats after intraperitoneal implantation of double veloured polyester (Dacron) prosthesis.

Introduction: The aim of this study was to assess the changes affecting natural killer cytotoxic cell (NKCC) activity following intraperitoneal implantation of a double veloured polyester prosthesis in a rat model.

Material/methods: Blood samples were taken by cardiac puncture 1 h before (base line) and 14, 28, 100 and 180 days post-implantation. Peripheral blood mononuclear cells were separated from heparinized blood by density centrifugation.