H - Electricity – 05 – G
Patent
H - Electricity
05
G
358/11
H05G 1/32 (2006.01) A61B 6/03 (2006.01) G01T 1/29 (2006.01) H01J 47/02 (2006.01)
Patent
CA 1193760
13 ABSTRACT: A radiography apparatus comprises a radiation source which is arranged to supply radiation spectra of different energy spectra, and also comprises a detector which can be adjusted or read for said radiation so that a strong wavelength discrimination occurs in the measure- ment signals. In a detector comprising an ionization chamber there is notably arranged an auxiliary electrode which can be respectively adjusted in phase with the radiation source so that soft radiation of a soft source spectrum or hard radiation of a hard source spectrum is comparatively favoured with respect to its contribution to the measurement signal.
389911
Kramer Cornelis
Zonneveld Frans W.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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