A sensor unit (14) for a radiation detector (12), the sensor unit (14) comprising a conversion element (22) comprising a plurality of imaging pixels (30), wherein each imaging pixel (30) is configured to directly convert radiation into an electrical charge and wherein each imaging pixel (30) comprises a charge collection electrode (28); and a readout substrate (24) comprising a plurality of readout pixels (32), wherein each readout pixel (32) is connected to an associated imaging pixel (30) by means of an interconnection (36) at a connection position on the charge collection electrode (28); wherein each readout pixel (32) has a smaller area than an associated imaging pixel (30) of the plurality of imaging pixels (30); and wherein the connection positions in relation to the charge collection electrodes (28) are varied with respect to a neighboring charge collection electrode (28). A radiation detector (12) and a method of manufacturing a sensor unit (14) are also provided.
A sensor unit (14) for a radiation detector (12), the sensor unit (14) comprising a conversion element (22) comprising a plurality of imaging pixels (30), wherein each imaging pixel (30) is configured to directly convert radiation into an electrical charge and wherein each imaging pixel (30) comprises a charge collection electrode (28); and a readout substrate (24) comprising a plurality of readout pixels (32), wherein each readout pixel (32) is connected to an associated imaging pixel (30) by means of an interconnection (36) at a connection position on the charge collection electrode (28); wherein each readout pixel (32) has a smaller area than an associated imaging pixel (30) of the plurality of imaging pixels (30); and wherein the connection positions in relation to the charge collection electrodes (28) are varied with respect to a neighboring charge collection electrode (28). A radiation detector (12) and a method of manufacturing a sensor unit (14) are also provided.
A semiconductor based photon counting detector comprising a substrate (11) of semiconductor material; a detector bias voltage supply (12) for applying a detector bias voltage over the substrate, each time during a data acquisition period (t1); a readout arrangement (13) for repetitively reading out data indicative of charges freed in, and transported through, the substrate (11) in response to photons being absorbed, each time during a readout period (t2) following a data acquisition period, wherein the data contain number of charge pulses of photons being absorbed; an external light source (15) for exposing the substrate for light to enable trapped charge carriers to escape from defect levels in the substrate; and a control device (14) operatively connected to the detector bias voltage supply, the readout arrangement, and the external light source. The control device (14) is configured to control the detector bias voltage supply to switch off the detector bias voltage over the substrate and the external light source (15) to switch on the light, thus exposing the substrate (11) for light to enable trapped charge carriers to escape from defect levels in the substrate, concurrently during at least some of said readout periods.
A semiconductor based photon counting detector comprising a substrate (11) of semiconductor material; a detector bias voltage supply (12) for applying a detector bias voltage over the substrate, each time during a data acquisition period (t1); a readout arrangement (13) for repetitively reading out data indicative of charges freed in, and transported through, the substrate (11) in response to photons being absorbed, each time during a readout period (t2) following a data acquisition period, wherein the data contain number of charge pulses of photons being absorbed; an external light source (15) for exposing the substrate for light to enable trapped charge carriers to escape from defect levels in the substrate; and a control device (14) operatively connected to the detector bias voltage supply, the readout arrangement, and the external light source. The control device (14) is configured to control the detector bias voltage supply to switch off the detector bias voltage over the substrate and the external light source (15) to switch on the light, thus exposing the substrate (11) for light to enable trapped charge carriers to escape from defect levels in the substrate, concurrently during at least some of said readout periods.
A system for recording CT data of an object in an object area (4) comprises an X-ray source (5) and an X-ray detector (6) at either side of the object area. The X-ray detector comprises a stack of elongated detector array arrangements (6a) arranged in parallel and provided for detecting X-rays (9a) from the X-ray source transmitted through the object, thus recording images of the object. A device (10a) is provided for rotating the X-ray source (5) and the X-ray detector (6) around an axis of rotation which is parallel with the elongated detector array arrangements, while the elongated detector array arrangements are provided for imaging the object repeatedly. Further, either the elongated detector array arrangements are moved within the X-ray detector or the axis of rotation is moved during the rotation to thereby provide for the elongated detector array arrangements to record the CT data.
A system for recording CT data of an object in an object area (4) comprises an X-ray source (5) and an X-ray detector (6) at either side of the object area. The X-ray detector comprises a stack of elongated detector array arrangements (6a) arranged in parallel and provided for detecting X-rays (9a) from the X-ray source transmitted through the object, thus recording images of the object. A device (10a) is provided for rotating the X-ray source (5) and the X-ray detector (6) around an axis of rotation which is parallel with the elongated detector array arrangements, while the elongated detector array arrangements are provided for imaging the object repeatedly. Further, either the elongated detector array arrangements are moved within the X-ray detector or the axis of rotation is moved during the rotation to thereby provide for the elongated detector array arrangements to record the CT data.
An apparatus for recording radiation image data of an object comprises a radiation source arrangement (3) provided for emitting radiation; an object holder (5) arranged in the radiation path of the emitted radiation and provided for housing the object during the recordation of the radiation image data; a detector arrangement (6) for detecting radiation which has interacted with the object; a support structure (2), to which the radiation source and detector arrangements are secured; and a scanning device (1) provided for moving either one of the support structure or the object holder with respect to the other one of the support structure or the object holder in a conical pendulum movement while the detector arrangement is provided for detecting radiation which has interacted with the object.
An apparatus for recording radiation image data of an object comprises a radiation source arrangement (3) provided for emitting radiation; an object holder (5) arranged in the radiation path of the emitted radiation and provided for housing the object during the recordation of the radiation image data; a detector arrangement (6) for detecting radiation which has interacted with the object; a support structure (2), to which the radiation source and detector arrangements are secured; and a scanning device (1) provided for moving either one of the support structure or the object holder with respect to the other one of the support structure or the object holder in a conical pendulum movement while the detector arrangement is provided for detecting radiation which has interacted with the object.
A method for creating, displaying, and analyzing X-ray images of a plurality of objects (13) is disclosed. The method comprising, for each of the objects recording (101) three- dimensional X-ray image data of the object in a single measurement; creating (102) a three-dimensional X-ray image (25) of the object from the three-dimensional X-ray image data; creating (103) one or two two-dimensional X-ray images (27) of the object from the three-dimensional X-ray image data; displaying (104) the one or two two-dimensional X-ray images of the object; and analyzing (105) the one or two two- dimensional X-ray images of the object. For a subset of the plurality of objects the three-dimensional X-ray image of the object is displayed (106), wherein the subset of the plurality of objects is determined based on the step of, for each of the objects, analyzing the one or two two-dimensional X-ray images of the object.
G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material
The invention relates to an imaging arrangement 1 for obtaining imaging data of an object 7. The imaging arrangement 1 comprises a support structure 3 having an axis of rotation 9 and comprising means 10 for rotating the support structure 3; a pair of first and second radiation modules 2a, 2b fixedly arranged on the support structure 3 along a radius perpendicular to the axis of rotation 9, wherein each of the radiation modules 2a, 2b comprises a radiation source 6a, 6b simultaneously emitting radiation; a radiation detector 4 for detecting radiation as emitted from the radiation modules 2a, 2b and passed through the object 7 being imaged; and a collimator 14 arranged between, as seen in a direction parallel to the axis of rotation 9, the pair of radiation modules 2a, 2b and the radiation detector 4. The invention also relates to a corresponding method.
A61B 6/02 - Arrangements for diagnosis sequentially in different planesStereoscopic radiation diagnosis
G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material
The invention relates to an imaging arrangement for imaging an object. The imaging arrangement comprises: an X-ray source 5; an X-ray detector 6 arranged to receive X-rays transmitted through the object from the X-ray source 5, wherein the X-ray detector 6 comprises a gaseous-based edge-on direction sensitive line detector provided with an electron avalanche amplifier, and wherein the line detector is adapted to record a line image of radiation as transmitted through the object; and a support device 8 to which the X-ray source 5 and the X-ray detector 6 are attached so as to be arranged on opposite sides of the object, and wherein the support device 8 is arranged to rotate around the object and is also arranged to be movable in relation to the object. The invention also relates to a system comprising such imaging arrangement.
G01N 23/083 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
G01N 23/02 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material
G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material
G01T 1/185 - Measuring radiation intensity with ionisation-chamber arrangements
12.
APPARATUS AND METHOD FOR CREATING TOMOSYNTHESIS AND PROJECTION IMAGES
An apparatus for creating tomosynthesis and projection images of an object (13) from tomosynthesis image data produced in a single measurement comprising an X-ray apparatus (11) provided for collecting the tomosynthesis image data of the object in a single measurement, a device (15) provided for creating a three-dimensional tomosynthesis image of the object from the tomosynthesis image data, and a device (17) provided for creating a two-dimensional projection image of the object from the three-dimensional tomosynthesis image by projecting the three-dimensional tomosynthesis image on a plane by means of summing, for each of the pixels of the two-dimensional projection image, pixel values of pixels along a respective straight line (29) in the three-dimensional tomosynthesis image, wherein the straight lines converge in a single point.
The invention relates to a detector arrangement 1 for imaging an object. The detector arrangement 1 comprises a support device 4, an X-ray source 3 and an X-ray detection device 2 attached to the support device 4 on opposite sides of the object 8. The X-ray detection device 2 is arranged to detect radiation transmitted by the X-ray source 3 for producing an X-ray image. The detector arrangement 1 further comprises an ultrasonography device 9 for sending ultrasound pulses into the object 8 and for receiving reflections of the pulses for producing an ultrasonographic image. The ultrasonography device 9 is attached to the support device 4. The X-ray detection device 2 and the ultrasonography device 9 are arranged to image the object 8 in a single scanning movement.
A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
A61B 6/02 - Arrangements for diagnosis sequentially in different planesStereoscopic radiation diagnosis
G01N 23/083 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
G03B 42/00 - Obtaining records using waves other than optical wavesVisualisation of such records by using optical means
The invention is related to a method for producing a collimator comprising an X-ray transparent substrate. The innovative method comprises the steps of: forming a slit in the substrate, wherein the slit has first and second side walls; filling the slit with an X-ray absorbing material so that the absorbing material extends from the first side wall to the second side wall; removing part of the X-ray absorbing material thereby forming a second slit that extends from the remaining absorbing material to the second side wall; filling the second slit with X-ray transparent material; removing part of the X-ray transparent material, thereby forming a third slit extending from the remaining transparent material to the second side wall; and finally filling the third slit with X-ray absorbing material. In accordance with the present invention a collimator can be produced having any desired aspect ratio.
The invention is related to a method for producing a collimator comprising an X-ray transparent substrate. The innovative method comprises the steps of: forming a slit in the substrate, wherein the slit has first and second side walls; filling the slit with an X-ray absorbing material so that the absorbing material extends from the first side wall to the second side wall; removing part of the X-ray absorbing material thereby forming a second slit that extends from the remaining absorbing material to the second side wall; filling the second slit with X-ray transparent material; removing part of the X-ray transparent material, thereby forming a third slit extending from the remaining transparent material to the second side wall; and finally filling the third slit with X-ray absorbing material. In accordance with the present invention a collimator can be produced having any desired aspect ratio.
A dual-source scanning-based radiation detecting apparatus comprises at least two radiation sources (11a-b) provided for emitting ionizing radiation; direction sensitive line detectors (16a) arranged in an array; and a device (17-19, 21-22) for scanning the line detectors (16a) in a scanning direction (x) across an object to be examined, wherein the line detectors in the array are pointing towards the radiation sources; and the device for scanning is arranged for keeping the line detectors aligned with the radiation sources during scanning to enable each of the line detectors to record multiple line images of the object. In accordance with the invention the line detectors (16a) in the array are direction sensitive and are alternately pointing towards different ones of the radiation sources; and the radiation sources are arranged in a plane, in which the scanning direction (x) lies.
A61B 6/02 - Arrangements for diagnosis sequentially in different planesStereoscopic radiation diagnosis
G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material
The invention is related to a detector assembly for detecting vapours, smoke and flames, comprising a detector unit 1 having a UV sensitive photocathode 3, an anode 5, a voltage supply unit 9 connected to the UV sensitive photocathode 3 and to the anode 5 to create an electric field such that photoelectrons emitted from the UV sensitive photocathode 3, when struck by UV light, are forced to move towards the anode 5, and a readout arrangement for detecting charges induced by electrons moving towards the anode 5 thereby generating a signal related to the intensity of detected UV light. The detector assembly further comprises an artificial source 21 for emitting radiation having wavelengths within a wavelength interval, the source 21 being oriented such that UV light from the source 21 can strike the UV sensitive photocathode 3. The wavelength interval coincides with a transmission band of air, and with an absorption band of vapours containing molecules of a complex structure. If a decrease of the signal between the detector 1 and the source 21 is detected a presence of a vapour can be established. The invention is also related to such a method.
09 - Scientific and electric apparatus and instruments
10 - Medical apparatus and instruments
Goods & Services
X-ray apparatus, not for medical purposes; electronics and software for X-ray apparatus, not for medical purposes. X-ray apparatus for medical purposes; electronics and software for X-ray apparatus for medical purposes.
