Abstract: A multi-slice X-ray CT scanner is provided to realize high resolution and a wide scanned region in a slice-thickness direction for an object. In the X-ray CT scanner, an X-ray beam for slice imaging is radiated toward an object and scanned in a predetermined slice-thickness direction, a direction orthogonal to the slice-thickness direction being defined as a channel direction. The scanner comprises a two-dimensional X-ray detector, a data acquisition system, and an electrically combining unit. The detector has a plurality of X-ray detecting elements arranged in a two-dimensional array of both rows in the slice-thickness direction and columns in the channel direction, the detecting elements of each row being arranged in unequal pitches. The data acquisition system has a plurality of data acquiring elements arranged in a two-dimensional array of rows and columns, acquiring signals detected by the two-dimensional X-ray detector, and producing digital data proportional to the detected signals.

Abstract: There is provided an X-ray CT apparatus which can generate high density data from data acquired by virtue of a helical scan and then execute image reconstruction based on the high density data. The X-ray CT apparatus includes a first processed data generating unit for generating first processed data by applying first interpolation process to acquired direct data, a second processed data generating unit for generating second processed data by generating a group of complementary data and then applying second interpolation process to the group of complementary data, and a third processed data generating unit for generating third processed data, which is high density data having twice sampling point number, by putting the first processed data and the second processed data therebetween alternately.

Abstract: An X-ray CT scanning apparatus comprises an X-ray source for irradiating a beam of X-ray to an object to be examined, a detector provided with at least two rows of detector elements for detecting the X-ray beam to have a real data, and a couch driver for traveling in an axial direction of the body of the object a couch on which the object is placed, in which the X-ray beam being irradiated from the X-ray source which is being rotated and simultaneously, the couch being traveled with the couch driver, the object is scanned in a helical direction so that the real data sampled by the detector is not identical in the sweep pattern to its opposite data. Two data located on both sides of the target slicing location may be selected from groups of the real data and their opposite data sampled by the detector and used to interpolate a data at the target slicing location.

Abstract: A radiation CT apparatus comprises a radiation source for irradiating a subject with radiations, detection section having at least two detector columns to detect radiations allowed to pass through the subject, section for obtaining data to be backprojected in accordance with data detected by the detection section, and image reconstruction section for reconstructing a transmitted image of the subject, wherein the image reconstructing section includes first backprojection section for backprojecting detected data to a predetermined centering plane, and second backprojection section for backprojecting data backprojected to the centering plane to the voxels corresponding to backprojected data.

Abstract: An x-ray computed tomography system and method having a reconstruction processing circuit that interpolates projection data for an x-ray beam path from 2N detector elements in a detector array proximate to a point where the x-ray beam path intersects the detector array. The system and method can also extrapolate data from 2N detector elements when the x-ray path intersects the detector array in an uppermost or lowermost detector row. The system and method determines an overlap region between two x-ray beams and can perform backprojection in the overlap region based upon both of the overlapping beams. The system can also determine a border region in the overlap region and perform backprojection in the border region based upon the two overlapping beams and in the remainder of the overlap area based upon cone angles of the x-ray beams. The system can also cancel or attenuate image artifacts by varying the helical scanning pitch, and can apply position-dependent and/or angular-dependent weighting.

Abstract: A medical information processing system for supporting diagnosis, capable of displaying an original image and a minified image over the original image without being interfered to each other, capable of optimal man-power & time saving configurations and methods, capable of realizing an optimal classifying technique for doctor's interpretation and CAD-processed result, and capable of optimizing efficiency in forming accurate interpretation report by using PACS in a mass survey. The system includes: a detecting unit for detecting location of abnormality from a first medical image in accordance with a predetermined algorithm; an image forming unit for forming a second medical image in which a marker indicating the location of the abnormality is overlapped; and a display unit for displaying the first medical image and the second medical image in an optimally efficient way.

Abstract: A multiple channel multiplexing apparatus has a data compressor portion for producing compressed data, and a data expander portion for expanding the received compressed data. The data compressor portion has a data compression circuit for data compressing digital audio data and outputting the resulting data blocks, a sub-block divider for dividing the data blocks output from the data compression circuit into sub-blocks, a sub-block ID flag adding circuit for adding a sub-block identification flag identifying the sub-block arrangement, a multiplexer for generating sub-block groups by combining a plural channel group of sub-blocks with the added sub-block identification flags, and multiplexing the sub-block groups to the digital audio interface format.

Abstract: A magnetic tape recording and reproducing apparatus includes tape leading end and tape trailing end detecting devices, each for detecting transparent and non-transparent portions of a magnetic tape. A control means is provided for activating and deactivating a reel brake in accordance with signals output by the tape leading end and tape trailing end detecting devices. The reel brake is provided for stopping a rotation of a reel which drives the magnetic tape.

Abstract: A magnetic recording and reproducing apparatus includes a control device for monitoring a take-up reel, a feed reel, and a capstan motor for rotational speed and direction. By monitoring the take-up reel, feed reel and capstan motor, the control device determines if the apparatus is operating properly. Based on the determinations regarding the proper operation of the apparatus, the control device controls the operation of the capstan motor and the shifting of the idler gear between a first operational state and a second idle state.