发明名称 |
APPARATUS AND METHOD FOR PROVIDING AN ORTHOGRAPHIC PROJECTION FROM HELICAL SCAN DATA |
摘要 |
An apparatus and method for providing a projection image directly from data acquired by a CT scanner, the method comprising: acquiring an amount of data corresponding to an entire object that is scanned by the CT scanner, wherein the amount of data is generated by an x-ray source that projects a fan beam of x-rays toward a detector array on an opposite side of a gantry of the CT scanner as the object is passed through an opening in the gantry; selecting an imaging plane, the imaging plane corresponding to a view of the object; dividing the imaging plane into a plurality of rows and columns, thus creating a grid of points corresponding to the imaging plane; determining, for each point in the grid, a data point from the acquired data corresponding to an x-ray source position wherein a ray from the x-ray source to the grid point is closest to a perpendicular orientation with respect to the imaging plane, and a detector position where the ray intersects the detector array,; and presenting a projection image corresponding to the selected imaging plane, wherein the projection image comprises a plurality of projection points and each projection point in the projection image is a converted value of the data points of the data points of the acquired data. |
申请公布号 |
WO2007067671(A2) |
申请公布日期 |
2007.06.14 |
申请号 |
WO2006US46641 |
申请日期 |
2006.12.06 |
申请人 |
GE SECURITY, INC.;GARMS, WALTER, I.;DIGIROLAMO, UGO;MERZBACHER, MATTHEW |
发明人 |
GARMS, WALTER, I.;DIGIROLAMO, UGO;MERZBACHER, MATTHEW |
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