Patent WO-2012079737-A3 (WO)
Inventor: BAVENDIEK KLAUS
IPC: G01T1/29
Filed: 2011-12-12
Abstract: The invention relates to an x-ray line detector having a predefined number of carrier modules (1) which, apart from a production tolerance, have the same width a and are arranged in a housing (8), wherein a one-piece printed circuit board (2), on which a photodiode (3) is arranged, is attached to each carrier module (1), wherein this printed circuit board (2) is wider than the pixel forming the active surface of the photodiode (3), wherein in each case a scintillator element (4) is attached to each photodiode (3) the length b of said scintillator element precisely covering the active area in the width thereof plus an interspace between two adjacent pixels of a photodiode (3), wherein the width a of each carrier module (1) is at most twice as large as the length b of a scintillator element (4), wherein the carrier modules (1) are arranged in two rows (9, 10) in the housing (8) such that the photodiodes (3) of each row (9, 10) lie opposite each other, wherein the scintillator elements (4) abut one another upon impact, wherein scintillator elements (49) abutting one another are arranged in respectively opposite rows (9, 10). In addition, the invention relates to a method for producing an x-ray line detector having the features of one of the preceding claims, comprising the following steps: inserting a first spacer (21) on the first end plate (16) and subsequently inserting a first carrier module (1') on the first carrier element (11) until the scintillating element (4) thereof butts up against the first spacer (21) and inserting a first buffer piece (23) on the second carrier element (12) until it butts up against the first end plate (16), wherein the insertion of the first carrier module (1') and of the first buffer piece (23) can also be carried out in the reverse order. As an alternative to the preceding step, the first buffer piece (23) on the second carrier element (12) can also first be attached to the first end plate (16) upon impact, and thereafter the first spacer (21) can be attached to the first end plate (16) upon impact, and subsequently the first carrier module (1') with the scintillating element (4) thereof is attached to the first spacer (21) upon impact. After one of the two previously mentioned alternative steps, a second carrier module (1'') is inserted in such a way that the scintillator element (4) thereof butts against the scintillator element (4) of the first carrier module (1') and said second carrier module itself butts against the first buffer piece (23); then, alternatingly, a carrier module (1) is always inserted on the first and on the second carrier element (11, 12), wherein the respective scintillating element (4) thereof butts against the scintillator element (4) of the directly previously inserted carrier module (1). In any desired order, a second spacer (22), which is half as wide as a scintillating element (4), is placed on the scintillator element (4) of the last carrier module (1''') upon impact and a second buffer piece (24), which is half as wide as a carrier module (1), is placed on the carrier module (1) upon impact, which carrier module is inserted as the next to last; clamping means in the second end plate (17), in particular the third clamping screw (20), are actuated in such a way that all the scintillator elements (4) are pressed with the respectively opposite end faces (28) thereof against each other; fixing the two rows (9, 10) of carrier modules (1) with clamping means in the second end plate (17), in particular by means of the first and second clamping screws (18, 19).