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Electron beam CT scanners are considered a fifth generation CT scanner, with first generation being the pencil beam with translation and rotation, second generation being a fan beam with similar motion to its predecessor, third generation having both rotating fan beam and detectors and fourth generation being a fan beam with a rotating movement but fixed detector.
Siemens was the first to combine positron emission tomography (PET) with computed tomography (CT). [25] By creating this hybrid imaging system, Siemens combined the PET scanner's ability to visualize biological processes of life with a CT system's anatomical image of tissues and organs.
This makes CT scan the most appropriate term, which is used by radiologists in common vernacular as well as in textbooks and scientific papers. [218] [219] [220] In Medical Subject Headings (MeSH), computed axial tomography was used from 1977 to 1979, but the current indexing explicitly includes X-ray in the title. [221]
A Siemens SPECT/CT scanner in operation. Siemens Healthineers AG is a publicly listed company that was spun off from Siemens in 2017. As of 2022, Siemens retains a 75% majority stake in Siemens Healthineers. [6]
The portable CT scanner does not replace the fixed CT suite. An example of this type of machine is the Siemens Healthineers SOMATOM On.site. In 2008 Siemens introduced a new generation of scanner that was able to take an image in less than 1 second, fast enough to produce clear images of beating hearts and coronary arteries.
In conventional CT machines, an X-ray tube and detector are physically rotated behind a circular shroud (see the image above right). An alternative, short lived design, known as electron beam tomography (EBT), used electromagnetic deflection of an electron beam within a very large conical X-ray tube and a stationary array of detectors to achieve very high temporal resolution, for imaging of ...
Elscint (perhaps a portmanteau of the words "electronic" and "scientific, but more likely of "El" as in "El Al", and "Scint", as in scintillation, referring to the type of radiation detector used in Nuclear Medicine as in Elscint's first products.) was founded in 1969 by Dr. Avraham Suhami, who was a nuclear physics professor at the Technion – Israel Institute of Technology at the time ...