Advices for Life

Ct Scan

November 30, 2016 00:16

CT angiography

CT angiographic images to be analyzed in different projections MIP (maximum intensity projection), MPR (multiplanar reconstruction) or a three-dimensional reconstruction of the VRT (volume rendering technique).In these processing modes is used with a length of the pixel resolution in the cross section of 0.5 mm (the plane X - Y) and a higher resolution along a body axis (Z-axis).As a result...

November 30, 2016 00:16

Magnetic resonance angiography

Magnetic resonance angiography (MP-angiography) in contrast to the spiral CT, conventional and digital subtraction angiography allows visualization of the blood vessels, even without the use of a contrast agent.Research can be carried out in 2D or 3D mode. MP-imaging techniques moving fluid (blood) are divided into three categories: vremyaprolёtnaya MR angiography - TOF (Time of Flight)...

November 30, 2016 00:16

Perfusion studies

Using perfusion study methods considered and quantified blood flow. To modern quantitative methods of investigation of cerebral hemodynamics include MRI, spiral CT with contrast-enhanced CT with xenon, single photon emission CT and positron emission tomography (PET).The advantages of minimally invasive CT and MRI techniques - minimally invasive, high sensitivity in the evaluation of tissue...

November 30, 2016 00:15

Positron emission tomography

Positron Emission Tomography (PET) - a method of in vivo study of metabolic and functional activity of the body's tissues.The method is based on the phenomenon of positron emission observed in the entered text into the body of the radiopharmaceutical during its distribution and accumulation in different organs.The neuroscience major point of application of the method - the study of brain me...

November 30, 2016 00:15

Functional magnetic resonance imaging

Functional MRI is based on the increased blood flow in the brain in response to increased neuronal activity of the cortex under the action of the appropriate stimulus.Mapping the brain activity allows to identify areas of neuronal activation that occur in response to stimulation (motor, sensory and other stimuli). ehoplanarnoy Using pulse sequence based on the gradient echo allows you to r...

November 30, 2016 00:15

Magnetic resonance spectroscopy

Magnetic resonance spectroscopy (MP-spectroscopy) allows non-invasively obtain information on brain metabolism.Proton 1H-MR spectroscopy is based on the "chemical shift" - a change of the resonance frequency of the protons that make up the different chemical compounds.This term N. Ramsey introduced in 1951 to denote the difference between the frequencies of the individual spectral peaks.Uni...

November 30, 2016 00:15

Diffusion- weighted MRI

Diffusion - the basic physical process occurring in the metabolic reactions of the cell.The first diffusion-weighted MP-image was built in 1985. In clinical practice diffusion MRI came with MRI scanners III generation.For diffusion-weighted tomograms used ehoplanarnye pulse sequences "spin echo» EPI with two diffusion gradients of the same amplitude and duration.To quantify the diffusion pr...

November 30, 2016 00:15

Magnetic resonance imaging ( MRI ) of the kidneys

The most common indications for MRI of the kidneys - diagnosis and staging of tumors.However, CT for the same purpose prescribed much more often.Multiple comparative studies have shown that CT and MRI can detect exactly the same tumor, but the latter provides additional information regarding the process.Typically, the use of MRI is recommended as an additional diagnostic method, if CT does ...

November 30, 2016 00:15

CT scan

CT scan - a special kind of X-ray examination, which is conducted through indirect measurement of attenuation or attenuation of X-rays from different positions, defined around a patient under examination.In fact, all that we know is: that leaves the X-ray tube, that reaches the detector and what is the place of X-ray tube and detector in each position. Everything else follows fro...

November 30, 2016 00:15

Computed tomography of the brain

CT, X-ray or CT scan - the first method of intravital imaging of brain structures (in English literature, this method is also often referred to as "computerized axial tomography").Computed tomography of the brain is based on the X-ray examination, computer analysis of the results, which makes it possible to grasp the subtle differences of the absorption of X-rays in different (normal or mod...