Radiant energy – Inspection of solids or liquids by charged particles – Analyte supports
Patent
1977-01-21
1978-06-27
Church, Craig E.
Radiant energy
Inspection of solids or liquids by charged particles
Analyte supports
250514, G03B 4116
Patent
active
040977471
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 consists in that there is provided a shield which moves with the radiator but whose direction does not change in space during the measurement, but does 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.
REFERENCES:
patent: 3922552 (1975-11-01), Ledley
Church Craig E.
Trifari Frank R.
U.S. Philips Corporation
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