Controlled cardiac computed tomography
First Claim
1. The controlled cardiac computed tomography (CCCT) methodology and techniques that consist of all or some of the following components:
- (i) a method for monitoring and predicting the cardiac motion pattern;
(ii) a method for identifying missing projections needed for a desirable cardiac reconstruction quality;
(iii) a mechanism for steering the x-ray source rotation in reference to the cardiac motion pattern, the data incompleteness and the current source parameters (position, velocity, etc.) for collection of needed projection data;
(iv) a data acquisition system controlled by the said mechanism;
(v) an image reconstruction algorithm that reconstructs cardiac images from the data collected by the said data acquisition system;
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Abstract
Cardiac computed tomography (CT) has been a hot topic for years because of the clinical importance of cardiac diseases and the rapid evolution of CT systems. In this application, we disclose a novel strategy for controlled cardiac CT (CCCT) that may effectively reduce image artifacts due to cardiac and respiratory motions and reduce the scan time. Our approach is radically different from existing ones and is based on controlling the x-ray source rotation velocity and powering status in reference to the cardiac motion. By such a control-based intervention the data acquisition process can be optimized for cardiac CT in the cases of periodic and quasi-periodic cardiac motions. Specifically, we present the corresponding coordination/control schemes for either exact or approximate matches between the ideal and actual source positions.
45 Citations
20 Claims
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1. The controlled cardiac computed tomography (CCCT) methodology and techniques that consist of all or some of the following components:
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(i) a method for monitoring and predicting the cardiac motion pattern;
(ii) a method for identifying missing projections needed for a desirable cardiac reconstruction quality;
(iii) a mechanism for steering the x-ray source rotation in reference to the cardiac motion pattern, the data incompleteness and the current source parameters (position, velocity, etc.) for collection of needed projection data;
(iv) a data acquisition system controlled by the said mechanism;
(v) an image reconstruction algorithm that reconstructs cardiac images from the data collected by the said data acquisition system;
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification