Siemens Aktiengesellschaft

Annabella Rauscher

Karl Stierstorfer

Thomas Flohr

Herbert Bruder

Ernst Klotz

Karl Schwarz

A method is for image reconstruction for computed tomography with a non-one-dimensional, extended detector. The rays of the detector are weighted during the backprojection as a function of their position in the beam.

Method of creating images in computed tomography (CT), and CT device

A method is disclosed for forecasting the contrast medium flow in a living body, in particular in a patient, in which a defined test bolus with a contrast medium is injected, preferably intravenously and with a known injection flow profile, into the body, preferably into a blood vessel. The time concentration profile of the contrast medium is observed and determined over a limited time period with a number of measuring instants at at least one location in the body with the aid of a tomographic method. The time profile of the contrast medium concentration of another contrast medium dose is forecast with the aid of a linear cause/effect formulation from the measured data obtained via the distribution of the contrast medium. The following calculation formula is then used for forecasting the time concentration profile {tilde over (c)}(t) of the contrast medium at at least one of the previously measured locations of the body: 

Method for forecasting the contrast medium flow in a living body

A weighted method is for producing images with the aid of a spiral computed tomography unit. Further, in a CT unit, the detector and beam are tuned to one another in such a way that a drop in dose rate occurs at the edges within the detector. The form of the weighting function corresponds at least approximately to the dose rate characteristic and/or to the characteristic of the signal quality of the detector.

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Erlangen, Germany

Annabella Rauscher