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All About Computer Networks

 Computers have been an integral part of many businesses' operations over the years. All businesses require the services of computer support, maintenance and installation. The number of computers required to run a business grows. To ensure that computers work efficiently, it is important to have a system for connecting them. Computers are interconnected in many ways. This is the concept behind a computer network. What is a computer network? A computer network is a collection of computers that are connected to each other in order to share resources. Internet is the most commonly shared resource. Other resources include printers and file servers. The network computers can be connected wirelessly via radio waves or Ethernet cables. We will now see how individual computers within a network are connected. Nodes are computers that are connected to a network. Star Topology: This is because there is a central point from which all connections to computers are made. This means that even if a...
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PET Scan Lung, Heart and on Other Body Parts - How does it work

 Positron emission Tomography, or PET, is a non-invasive procedure that creates a radioactive image of any part of the body such as the heart or lung. A radioactive tracer, also known as radionuclides, is injected into the blood to accomplish this. The tracer is absorbed into the bloodstream through the muscles. By measuring the blood flow, the scan can determine if the heart health is good or bad. PET scans can help diagnose narrowed arteries and dead cells after a heart attack. A PET Scan's Basic Functions The following steps are required to conduct a PET CT scan: The tracer is administered to the bloodstream. It is an organic compound that can be found in bodies that have been radioactively tagged. It is generally made from glucose, ammonia, or water. Once inside the body, the tracer emits gamma radiation rays. A detector circles the body to pick up the beams and sends them to a computer. The system converts these signals into clear images. By combining photos of thin slices of ...
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