Direct conversion x-ray detector
AssigneeKoninklijke Philips Electronics N.V.
InventorsKlaus Jurgen Engel, Christoph Herrmann
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Abstract
The invention relates to a radiation detector (100) comprising a converter element (102) for converting incident high-energy radiation (X) into charge signals. A cathode (101) and an array(104) of anodes (103) are disposed on different sides of the converter element(102) for generating an electrical field (E0, Ed) within it The strength of said electrical field (E0, Ed) is increased in a first region(Rd) near the anode array(104) with respect to a second region(R0) remote from it. Such an increase may be achieved by doping the first region(Rd) with an electron acceptor. The increased field strength in the first region (Rd) favorably affects the sharpness of charge pulses generated by incident radiation.
Claims13
A radiation detector comprising:
- a) a converter element for converting incident high-energy radiation (X) into charge signals;
- b) a cathode and an array of anodes disposed on different sides of the converter element for generating an electrical field (E0, Ed) in the converter element;
- wherein the converter element has a spatial inhomogeneity by which the strength of said electrical field (E0, Ed) is increased in a first region (Rd) near the anode array and/or decreased in a second region (R0) remote from the anode array.
Dependencies are inferred from the claim text.