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Logarithmic Spirals and Computer Art
1989Interesting geometric patterns are obtained by mapping a rectangular region in one coordinate system onto an annular region in another coordinate system. The mapping involves logarithmic spirals and several examples are presented which involve interlocking spirals, cubes and dragon patterns.
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Spiral Problems For An Electronic Computer
Journal of the Highway Division, 1965A set of parameter equations is developed to define any highway or bridge spiral offering a transition between a tangent and a circle or between two circles of different radii. These equations are then used in sets of procedures to help solve intersections of spirals with straight, circular, or spiral lines.
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HELICAL (SPIRAL) COMPUTED TOMOGRAPHY
Gastroenterology Clinics of North America, 1995Robert K. Zeman +5 more
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Technical Foundations of Spiral Computed Tomography
1996The Introduction of continuously rotating computed tomography (CT) measurements systems provided the technological basis for spiral CT. Slip rings are used to transfer the necessary electrical energy to the rotating gantry and to transmit the measured data from the rotating part to the computer system; the cables that were used traditionally in CT ...
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Spiral computed tomography — a short overview
1998During the late 1980s and at the beginning of the 90s, fast CT (computed tomography) scanners with an examination time of less than 1 second, based on the slipring technology, were introduced into clinical practice. These scanners offered the opportunity to have continuous data acquisition over a multitude of 360° scans, and it seemed feasible that ...
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Computed tomography ‐ spiralling towards diagnosis
Journal of Small Animal Practice, 2009openaire +2 more sources