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The main machine in the line was the GE-225 (1961). [5] [3] It used a 20-bit word, of which 13 bits could be used for an address.Along with the basic central processing unit (CPU) the system could also have had a floating-point unit (the "Auxiliary Arithmetic Unit"), or a fixed-point decimal option with three six-bit decimal digits per word.
The images may also be used to check for other requirements of some types of treatment, such as full or empty bladder, empty rectum, etc. [8] [27] The same cone beam beam source and detector can alternatively be used to take simple X-ray positioning images if the organ shows particularly well on X-ray or if Fiducial markers have been inserted ...
Low-dose high-resolution (1.25 mm) chest CT. HRCT is performed using a conventional CT scanner. However, imaging parameters are chosen so as to maximize spatial resolution: [1] a narrow slice width is used (usually 1–2 mm), a high spatial resolution image reconstruction algorithm is used, field of view is minimized, so as to minimize the size of each pixel, and other scan factors (e.g. focal ...
Drawing of CT fan beam and patient in a CT imaging system CT scan of the thorax. The axial slice (right) is the image that corresponds to number 2/33 on the coronal slice (left). Spinning tube, commonly called spiral CT, or helical CT, is an imaging technique in which an entire X-ray tube is spun around the central axis of the area being ...
In 1974, work on CT was started and the first CT machine was installed in 1976. In June 1980, the company acquired the CT scanner business of EMI. [8] GE Signa series MRI Scanner, used at Narayana Multispeciality Hospital, Jaipur. In 1982, the company set up a joint venture with Yokogawa Electric. It changed its name to GE Healthcare Japan ...
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 ...
The first production X-ray CT machine (in fact called the "EMI-Scanner") was limited to making tomographic sections of the brain, but acquired the image data in about 4 minutes (scanning two adjacent slices), and the computation time (using a Data General Nova minicomputer) was about 7 minutes per picture.
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 ...
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