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The dense MCA sign is a dense artery sign observed on non-contrast computed tomography (CT) of the brain and is an important early marker of acute ischemic stroke involving the middle cerebral artery territory. [1] It refers to an abnormally increased attenuation (hyperdensity) of the MCA, reflecting an intraluminal thrombus or embolus.
Mast cell activation syndrome (MCAS) is a term referring to one of two types of mast cell activation disorder (MCAD); the other type is idiopathic MCAD. [1] MCAS is an immunological condition in which mast cells, a type of white blood cell, inappropriately and excessively release chemical mediators, such as histamine, resulting in a range of chronic symptoms, sometimes including anaphylaxis or ...
In computing, Machine Check Architecture (MCA) is an Intel and AMD mechanism in which the CPU reports hardware errors to the operating system.. Intel's P6 and Pentium 4 family processors, AMD's K7 and K8 family processors, as well as the Itanium architecture implement a machine check architecture that provides a mechanism for detecting and reporting hardware (machine) errors, such as: system ...
Activate your AARP membership by doing one of the following: 1. Visit the AOL AARP webpage and click Get Started. Follow the prompts to complete your AARP membership registration. Note: Whether you are an existing AARP member or not, you will need to register. You may also activate your AARP membership from mybenefits.aol.com.
The sign has been observed in the middle cerebral artery (MCA), [4] posterior cerebral artery (PCA), [5] vertebral artery, [2] and basilar artery; [6] these have been called the dense MCA sign, dense PCA sign, dense vertebral artery sign, and dense basilar artery sign, respectively. Rarely, a hypodense artery sign can occur due to fat embolism. [7]
Machine checks are a hardware problem, not a software problem. They are often the result of overclocking or overheating. In some cases, the CPU will shut itself off once passing a thermal limit to avoid permanent damage.
Middle cerebral artery syndrome is a condition whereby the blood supply from the middle cerebral artery (MCA) is restricted, leading to a reduction of the function of the portions of the brain supplied by that vessel: the lateral aspects of frontal, temporal and parietal lobes, the corona radiata, globus pallidus, caudate and putamen.
A multichannel analyzer (MCA) is an instrument used in laboratory and field applications to analyze an input signal consisting of voltage pulses. [1] MCAs are used extensively in digitizing various spectroscopy measurements, especially those related to nuclear physics , including various types of spectroscopy (alpha-, beta-, and gamma ...