Abstract: An information processing apparatus is provided that includes a control unit to execute an operating system and selectively output a first video signal or both the first video signal and a first audio signal, an external input unit to which an external content signal containing a second video signal and a second audio signal transmitted from an external apparatus is input, and a reproduction state switch control unit to selectively switch a first reproduction state for reproducing the first video signal or both the first video signal and the first audio signal, and a second reproduction state for reproducing the second video signal and the second audio signal, wherein, if input of the external content signal to the external input unit is detected during a reproduction standby state, the reproduction state switch control unit switches the reproduction standby state with the second reproduction state.

Abstract: An information-processing apparatus comprises an acquisition unit configured to acquire information about a communication-method type from a display device connected to the information-processing apparatus, a determination unit configured to determine whether or not the display device is adapted to receive data on digital contents by using a predetermined copyright-protection technology based on the communication-method-type information, a conversion unit configured to convert an image quality of the digital contents based on the determination result, and an output unit configured to transmit the converted digital contents to the display device.

Abstract: An information processing apparatus is provided that includes a control unit to execute an operating system and selectively output a first video signal or both the first video signal and a first audio signal, an external input unit to which an external content signal containing a second video signal and a second audio signal transmitted from an external apparatus is input, and a reproduction state switch control unit to selectively switch a first reproduction state for reproducing the first video signal or both the first video signal and the first audio signal, and a second reproduction state for reproducing the second video signal and the second audio signal, wherein, if input of the external content signal to the external input unit is detected during a reproduction standby state, the reproduction state switch control unit switches the reproduction standby state with the second reproduction state.

Abstract: An information-processing apparatus comprises an acquisition unit configured to acquire information about a communication-method type from a display device connected to the information-processing apparatus, a determination unit configured to determine whether or not the display device is adapted to receive data on digital contents by using a predetermined copyright-protection technology based on the communication-method-type information, a conversion unit configured to convert an image quality of the digital contents based on the determination result, and an output unit configured to transmit the converted digital contents to the display device.

Abstract: An apparatus for a detecting the location of incident radiation comprises at least one pair of assembly comprised of a scintillation crystal consisting of a plurality of crystal segments, a pair of photo-multiplier tubes optically coupled to the scintillation crystal so as to be able to detect a scintillation produced in any one of these crystal segments. These plural crystal segments are coupled to each other in such manner that any scintillation produced in any single crystal segment will cause the photo-multiplier tubes to deliver substantially a same output irrespective of the illuminating position within this crystal segment, and also that scintillations produced in the respective crystal segments will cause the photo-multiplier tubes to deliver outputs which are different in level for the respective crystal segments.

Abstract: An apparatus for effecting positron emission computed tomography comprises rows of a plurality of arrays of detectors arranged rotatably around a center of rotation in such way that at least one of the detectors in each array is disposed at an irregular position relative to the rest of detectors in the array, and that, for each revolution of the row through an angle of 360.degree./n (wherein: n represents an odd number of 3 or larger), each array of detectors will assume exactly the position occupied by its adjacent array till the revolution takes place.

Abstract: An apparatus for optically transmitting signals from a rotatable body to a stationary side or vice versa in a non-contact manner, includes a plurality of light emitting elements excited by a PCM signal from a signal source and a plurality of light receiving elements disposed in opposition with the light emitting elements for receiving light therefrom. A plurality of sets each including plural light receiving or emitting elements are provided at the stationary side in association with the respective light emitting or receiving elements disposed at the rotatable body side. Alternatively, a plurality of sets each including plural light emitting elements are provided at the rotatable body side in association with the respective light receiving elements disposed at the stationary side. The elements in such plural sets are selected in accordance with the rotation of the rotatable body.

Abstract: In a radiation detector including a radiation sensitive scintillator and a photo-electric conversion element, a film of silicon nitride providing a modified refractive index is interposed between the scintillator and the photo-electric conversion element.

Abstract: A scanner for positron emission computed tomography comprising a rotary member rotatable within the plane of a slice about an axis lying perpendicular to this plane and having means for accommodating a subject for examination, a drive means for rotating this rotary member within the plane of slice, and a plurality of radiation detectors provided on the rotary member so as to substantially face each other relative to the subject to be examined, in which the radiation detectors are disposed so that at least some of them are either positioned with irregular spacing relative to each other, or positioned at irregular distances from the axis of rotation.

Abstract: A scintillator for a gamma ray camera constituted by a crystal of NaI (Tl) having a surface roughness of less than 400 grit and a thickness of less than approximately 9 mm.

Abstract: A scintillator for a gamma ray camera includes a pair of crystals mechanically pressed together. The surfaces of the crystals are roughened so as to form a photo-diffuser for the light generated as a result of scintillation.