Abstract: A combination satellite television signal receiving antenna and a UHF/VHF antenna, particularly suitable for use with recreational vehicles. The satellite antenna is mounted for both horizontal and vertical adjustment having a circular periphery and the UHF/VHF dipole antenna is attached thereto and is of an arcuate configuration defining a portion of a circle concentric to the satellite receiving antenna dish configuration. The television and UHF/VHF antenna are mounted for simultaneous adjustment.

Abstract: In the present invention, an iterative process is provided for cone-beam tomography (parallel-beam and fan-beam geometries are considered as its special cases), and applied to metal artifact reduction and local reconstruction from truncated data, as well as image noise reduction. In different embodiments, these iterative processes may be based upon the emission computerized tomography (CT) expectation maximization (EM) formula and/or the algebraic reconstruction technique (ART). In one embodiment, generation of a projection mask and computation of a 3D spatially varying relaxation factor are utilized to compensate for beam divergence, data inconsistence and incompleteness.

Abstract: An improved imaging system has applications to synthetic aperture radar, inverse synthetic aperture radar, delay-doppler radar, positron-emission topography sonar, radiometry and other applications having a target image provided by a series of data parameterized by a variable such as .theta.. A receiver structure includes a bandpass matched-filter, square law envelope-detector, specialized processing and convolving to produce the improved images irrespective that the radar signals have practical side lobe structures and other features. Despite the demands of specialized processing the architecture of the algorithm permits real-time implementations.

Abstract: An improved method and apparatus for transaxial tomographic scanning of a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector pair which orbits and radially scans the patient in the plane of orbit. The source provides a plurality of beams of radiation having axes in the orbital plane. The beams pass through the patient to an array of detectors each of which is aligned with one of the beams. Radiation intensity data is collected at predetermined orientations of each beam/detector pair as the assembly orbits about the patient. In a preferred embodiment the rotatably mounted source-detector pair is rotated as a unit through a preselected rotation angle .phi. about an axis effectively passing through the source. The axis and the source-detector pair connected to it are then orbited around the patient through an orbit angle .gamma. while maintaining the preselected rotation angle .phi.. The axis is orbited about an origin lying in the orbital plane.

Abstract: A dual axial scanner in a transverse tomography system collects nonredundant data throughout one or more substantially 360.degree. orbital scan paths with uniform motion about a patient. A set of N X-ray beams scans the patient in a manner to allow collection of two sets of non-redundant data corresponding to a pair of 180.degree. scans in each 360.degree. scan. Overall time to conduct the study is decreased, and the number of required accelerations and decelerations of the assemblies is minimized.Adjacent beams of radiation are separated by an angle .alpha., which is one degree in the preferred embodiment to provide a radiation field of ##EQU1## degrees on either side of a center of the radiation field. The source and detector assemblies are positioned prior to the first orbit such that the field center is offset a distance D from a center of orbit lying in the orbital plane. The source and detector assemblies are mounted for rotation through a rotation angle .phi..sub.

Abstract: An improved method and apparatus for transaxial tomographic scanning a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector assembly which orbits and scans the patient in a plane of orbit. The source provides a plurality of beams of radiation having axes in the orbital plane. The beams pass through the patient to an array of detectors each of which is and respectively aligned with a different one of the beams. Radiation intensity data is collected at predetermined orientation of each beam - detector pair as the assembly orbits about the patient. In one embodiment the source and detector are rotated as a unit through a rotation angle .phi. about center of rotation while the assembly orbits the patient through an orbit angle .gamma.. Measurements are taken as the beams from the X-ray source sweep, due to the source detector rotation relative to a patient, through substantially uniformly spaced, coplanar points [t, (k), .theta.

Abstract: An improved method and apparatus for transaxial tomographic scanning of a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector pair which orbits and radially scans the patient in the plane of orbit. The source provides a plurality of beams of radiation having axes in the orbital plane. The beams pass through the patient to an array of detectors each of which is aligned with one of the beams. Radiation intensity data is collected at predetermined orientations of each beam/detector pair as the assembly orbits about the patient. In a preferred embodiment the rotatably mounted source-detector pair is rotated as a unit through a preselected rotation angle .phi. about an axis effectively passing through the source. The axis and the source-detector pair connected to it are then orbited around the patient through an orbit angle .gamma. while maintaining the preselected rotation angle .phi.. The axis is orbited about an origin lying in the orbital plane.

Abstract: A combination satellite television signal receiving antenna and a UHF/VHF antenna, particularly suitable for use with recreational vehicles. The satellite antenna is mounted for both horizontal and vertical adjustment having a circular periphery and the UHF/VHF dipole antenna is attached thereto and is of an arcuate configuration defining a portion of a circle concentric to the satellite receiving antenna dish configuration. The television and UHF/VHF antenna are mounted for simultaneous adjustment.