Abstract: The invention relates to a medical X-ray imaging apparatus comprising a frame part, an X-ray source for producing X-rays, radiation receiving means for detecting radiation transmitted through an object, and support means for supporting the X-ray source and the receiving means in positions on opposite sides of the object. The support means are connected to the frame part so as to rotate around the axis of rotation provided with actuator means for rotating the said support means around the said axis of rotation. The apparatus makes possible both panoramic imaging and CT imaging, as selected by the operator. The X-ray apparatus comprises means for adjusting the ratio of enlargement so as to be optimal for each method of imaging used respectively.

Abstract: The invention concerns a device for identification of a detector unit in an X-ray imaging apparatus. For this purpose there is a detector unit (1a or 1b or 1c . . . ), selected from a group (10) of different detector array units (1a, 1b, 1c . . . ), and a transmitter-receiver (8) at side(s) of a space (V) for said object or a rack for storing those detector units belonging to said group. Recognition means (11) or a sensor units capable of detecting presence and absence of the detector units is also provided, as well as a communication line (2) for providing identification data concerning the presence (P2) or absence of a single detector unit in a predetermined volume or place.

Abstract: The invention relates to a method, system and computer software product for detecting a fiducial in digital projection images, particularly for detecting a fiducial in digital X-ray images automatically, without any operations required of the user. The invention for detecting the image of a fiducial positioned in a digital projection image is characterized in that for at least part of the digital projection image pixels, there is calculated a direction of the intensity gradient; there is defined a region of the projection image, on the basis of the directions of the intensity gradients, where the direction of the intensity gradient is changed according to predetermined limits; and there is defined a matching rate for how well the model describing the image of the predetermined fiducial matches the defined region.

Abstract: The invention relates to a method for eliminating error elements caused by movements of an imaged object in X-radiography, said method comprising performing X-radiography on an imaged object for compiling three-dimensional X-radiographic information. The method comprises creating a model geometry of an X-ray imaging process, said creation work comprising a determination of the location for two or more position markers in a set of coordinates graded for an X-ray imaging apparatus. When X-radiography of an imaged object is completed, predictions are worked out regarding the locations of position markers during the imaging session. The locations and predictions determined on the basis of the model geometry are used as a basis for defining projected or most likely locations for the position markers and an automatic position markers identification method is applied for finding the locations of position markers from within a search area in the X-radiographic information.

Abstract: The invention relates to a device arrangement for intraoral X-ray imaging comprising an X-ray source unit for generating X-radiation and an intraoral sensor placed in the mouth for X-ray imaging, which receives X-radiation for compiling X-ray image data. The device arrangement comprises a protective garment, which garment protects the patient from X-radiation passing the intraoral sensor, and in which protective garment is located an electronics unit for the X-ray image data received by the intraoral sensor. The X-ray image data is transmitted from the intraoral sensor to the electronics unit by means of first data transfer means comprised in the device arrangement, the device arrangement further comprising second data transfer means for transmitting data between the electronics unit located in the protective garment and the rest of the device arrangement.

Abstract: An imaging plate for use in computerized radiography has an individual plate identification adapted to be visible in an X-ray image and a further indication marked visibly on the plate. Imaging plates found to be damaged when the X-ray image is examined can be identified by the visible marking.