H - Electricity – 05 – G
Patent
H - Electricity
05
G
358/11.1
H05G 1/00 (2006.01) A61B 6/03 (2006.01) A61B 6/06 (2006.01)
Patent
CA 1089118
ABSTRACT In third-generation computer tomography apparatus measuring values must be intermediately stored partly for the total scanning time in order to enable processing of all measuring values with a given projection angle. This involves high expenditures for storage means. Moreover, the applied dose is larger than required for obtaining the measuring value per se. The invention provides a shield which moves with the radiator but whose direction does not change in space during the measurement, but doe s change relative to the radiation beam. As a result, it is achieved that all measuring values with a given projection angle can be obtained within a part of the scanning time, the said part corresponding to the ratio between the opening angle of the radiation beam and the total scanning time. As a result, the cost of intermediate storage as well as the patient dose can be reduced.
270694
Fetherstonhaugh & Co.
N.v. Philips Gloeilampenfabrieken
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