| US 7,515,676 B2 | ||
| Method, apparatus, and computer program product for sinogram completion | ||
| Aleksandr A. Zamyatin, Buffalo Grove, Ill. (US) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan); and Toshiba Medical Systems Corporation, Otawara-shi (Japan) | ||
| Filed on Apr. 28, 2006, as Appl. No. 11/412,950. | ||
| Prior Publication US 2007/0253523 A1, Nov. 01, 2007 | ||
| Int. Cl. A61B 6/03 (2006.01) | ||
| U.S. Cl. 378—4 [378/901] | 25 Claims |
| 1. A method for estimating projection data outside a field of view of a scanning device, comprising:
obtaining projection data by scanning an object using the scanning device;
selecting a projection angle and a fan angle outside a field of view of the scanning device;
determining, based on the selected projection angle and fan angle, a plurality of sinogram curves, each sinogram curve corresponding
to a different image point in the object;
determining a contribution value for each of the sinogram curves based on the obtained projection data;
calculating estimated projection data for the selected projection angle and fan angle based on the determined contribution
values; and
storing the estimated projection data,
wherein the step of determining the contribution value includes interpolating the obtained projection data along at least
one of the plurality of sinogram curves.
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