Siemens Healthcare Gmbh

Siemens Healthineers Ag

Matthias Berner

Michael Grasruck

Jens Fehre

Hans-Juergen Mueller

Ulrich Kühn

Ulrich Kuehn

Florian Kiessling

Maurizio Bianconi

A method is for capturing projection data. The method includes positioning the first diaphragm jaw and a second diaphragm jaw to set a layer collimation of a fan beam of radiation via the first diaphragm jaw and the second diaphragm jaw; capturing projection data of a region of a patient to be imaged via a detector and radiation source rotated in a plane of rotation, moving the region of the patient to be imaged relative to the plane of rotation, the fan beam penetrating the region of the patient to be imaged and striking the detector; and moving at least one of the first and second diaphragm jaw during the capturing, to dynamically adjust a position of a boundary surface of the fan beam to a position of a boundary surface of the region, to avoid the fan beam penetrating the patient outside the region to be imaged.

Method for capturing projection data by way of a computed tomography device and computed tomography device

A method is for correcting an imbalance in a computed tomography system, in which a supporting structure includes a radiation source is fitted on a fixed mounting frame. The supporting structure rotates together with the radiation source about a measurement space, in which is fixed in place a measurement object having a known attenuation response for the radiation emitted by the radiation source. The method includes detecting first measurement data of the radiation while the supporting structure rotates about the measurement object, determining an imbalance arising during the rotation of the supporting structure on the basis of the acquired first measurement data of the radiation, and determining a position and a weight of at least one counterweight on the supporting structure in order to reduce the determined imbalance, or determining correction data, which is used to correct the imbalance in software.

Correcting an imbalance on the basis of the acquired radiation data

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Herzogenaurach, Germany

Matthias Berner