X-ray or gamma ray systems or devices – Beam control – Scanner
Patent
1995-01-12
1996-03-12
Porta, David P.
X-ray or gamma ray systems or devices
Beam control
Scanner
378 15, G21K 104
Patent
active
054992834
ABSTRACT:
A method and a apparatus for helical scan imaging in an X-ray CT, in which the initial set up operation can be achieved easily and accurately. In this X-ray CT apparatus, relative motion of a bed plate and an X-ray source is automatically controlled according to a desired imaging region specified by the operator such that the bed plate and the X-ray source are relatively moved through a distance covered by a scanning region appropriate for collecting the data required to reconstruct tomographic images for the desired imaging region. The scanning region includes the desired imaging region and supplementary interpolation data regions, located at the ends of the desired imaging region and utilized in carrying out interpolations for deriving data in the desired imaging region, and initial acceleration region accounting an initial acceleration of the bed plate, and a final deceleration region accounting a final deceleration of the bed plate.
REFERENCES:
patent: 4789929 (1988-12-01), Nishimura et al.
patent: 5046003 (1991-09-01), Crawford
patent: 5212717 (1993-05-01), Hada
patent: 5224135 (1993-06-01), Toki
patent: 5386452 (1995-01-01), Toki
Kabushiki Kaisha Toshiba
Porta David P.
Wong Don
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