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A PET scanner is a positron emission tomography imaging system. It takes advantage of the fact that some radioisotopes undergo radioactive decay by the emission of a positron. This form of decay, by the way, is beta decay, or beta plus decay, to be more specific. The positron is a form of anti-matter, and it is actually an anti-matter electron.
When a positron is emitted from an atomic nucleus, it travels a short distance (slowing down all the while), and then "combines" with an electron in what is called mutual annihilation. When a positron and electron capture each other, their entire mass is converted into electromagnetic energy. This energy appears in the form of two high energy gamma rays, and they leave the event in opposite directions (to be picked up by a pair of detectors). That is the connection of gamma rays to the PET scanner.
There is a bit more to the machine, as the pair of detectors is rotated about what is to be imaged. Further, whatever is to be imaged is moved through the "ring" about which the detectors spin. The connection between the machine and the gamma ray has, however, been established. The PET scanner detects the gamma rays emitted from the mutual annihilation of positrons and electrons.
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What does a PET scan demonstrates the detection of?
Do you mean, what is the application of a PET scanner? then... It is used mostly to detect heart/brain diseases and tumors, but is also used for many more things.
How does the RFID tracking work?
RFID tracking works by utilizing radio frequencies. The connect and communicate with electronic readers without needing to be specially scanned. Each RFID tag has a microchip that stores data it collects, and each tag has an antenna that receives communication from the RFID readers. The tag sends a radio signal to the RFID reader, which the reader interprets.
Is a pet an omnivore?
Depends on the species of the pet.
If sun UV rays can poison purified water?
No it can't poison water. If that was the case nothing could live in or around water. Animals drink it. People drink it. Trees grow around and in water. Fish swim it. In fact, it's the opposite. UV rays can purify contaminated water. The SODIS method (look it up) is used in many countries around the world where clean water is not available. Water is put into a clean PET bottle and left in the sun for 6 hours. After that the water is clean and safe to drink.
Is there a difference between PET and APET plastic?
There is no difference. PET is polyester, which has a chemical name of polyethylene terephtlalate. PET can be made with the polymers aligned in two primary ways; amorphous or crystalline. Virtually all of what you come in contact with is amorphous with one major exception; microwave food trays, which if made from PET are made from C-PET (crystallized PET). Virtually all clear PET including Mylar and water bottles are made from A-PET (amorphous PET). In many cases the "A" is simply left off.
What kind of electromagnetic spectrum can be found in a PET scanner?
A PET scanner does not use electromagnetic radiation.The subject either consumes or is injected with a radioactive chemical that decays by emitting positrons. These positrons are detected by particle detectors in the scanner and a computer calculates where they came from to generate the image.
How does a chinchilla relate to a human being?
A chinchilla may relate as a pet if you have him from birth. But remember they are wild creatures.
What are there common uses of gamma rays?
gamma rays contributed to the creation of the atomic bombs by using the gamma radiation somehow. also gamma rays kill cancer cells during chemo or radiation therapy. -To sterilise surgical instruments.-Killing harmful bacteria-To detect brain and heart abnormalities
What produces Gamma rays?
Gamma rays are typically produced by the decay from high energy states of atomic nuclei, called gamma decay, but they are also created by other processes. For instance, gamma rays are also produced by secondary radiation from atmospheric interactions with cosmic ray particles. Also, rare terrestrial natural sources produce gamma rays that are not of a nuclear origin, like lightning strikes and terrestrial gamma-ray flashes. Plus, they are produced by astronomical processes where very high-energy electrons are produced that cause secondary gamma rays via bremsstrahlung, inverse Compton scattering and synchrotron radiation.
What are positrons and what medical imaging technique employs them?
Positronic Emission Tomography (PET Scanner) Positrons are the antiparticle to an Electron. Basically, a radioactive isotope is injected into the patient's blood, the isotope being unstable desires to reach stability, so a proton inside the nucleus is converted into a neutron by 'shedding' off a positron. After a few millimetres, the positron will encounter an electron. When these two particles collide they then 'annihilate' each other, a cocktail of photons are then given off in the form of gamma-rays. The sensors around the patient have photo sensitive plates that detect this gamma radiation, this then generates an electric current which via heavy computing is converted readily into an image.
What does a PET scan demonstrates the detection of?
Do you mean, what is the application of a PET scanner? then... It is used mostly to detect heart/brain diseases and tumors, but is also used for many more things.
What tool is used in a hospital to look at blood flow in a brain?
Usually a PET scanner (positron emission tomography scanner) with radioactive glucose. Note: following this test you will be slightly radioactive for about 10 to 12 hours.
How did Anderson help society?
Carl David Anderson discovered the existence of positrons which then led to the PET scanner or the positron emission tomography
How do pet location microchips work?
Dogs that get caught on the street are scanned by dog shelter workers with a handheld scanner. The scanner reades the information on a microchip (the information usually includes the street address/phone number/names of the owners.
How can you see if your pets were shipped?
Take it to any veterinary practice. They'll have a hand-held scanner they can check your pet with. If there is a chip - it will display the ID number.
Can laser levelers harm pet eyes?
all lasers hurt any kinds of animals, because the harmful rays can blind them
Rays as pets?
A manta ray as a pet could be a good idea IF, (1) you have its stinger cut off, and (2) if you have a good place to put him...
