Semicircular inversed offset scanning for enlarged field of view 3d
A field of view, offset position technology used in the field of C-arm systems
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[0043] With respect to the full beam geometry, figure 2 The detector 204 of the imaging system shown in is displaced in a lateral direction by approximately half its lateral dimension or width 120 . A ray or projection 222 with a small distance to the center of rotation 214 is perpendicular to the plane of the detector 204 . At a given projection angle, the detector 204 detects that the Figure 4 Radiation of about half of the FOV 218 shown in (note the overlap or transition region 224 ensures that projection data is acquired in the central region of the lateral FOV 218). Although the half-beam acquisition geometry achieves a relatively large lateral FOV relative to the full-beam geometry shown in the embodiment of FIG. 1 , full angular sampling of the lateral FOV requires data collection over an angular range of approximately 360° . The computed tomography method uses an x-radiation source 202 , on which a detector 204 is mounted on a support (not shown here). A source (2...
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Abstract
Description
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Application Information
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