发明名称 |
Image reconstruction from helical partial cone-beam data |
摘要 |
A two-dimensional radiation detector (30) receives divergent ray penetrating radiation along conical or pyramidal ray paths which converge at an apex. The radiation may emanate from one or both of an x-ray tube (16) or radionuclei injected into a human subject. As the radiation detector rotates around the subject, it is repeatedly sampled to generate two-dimensional data sets ht(u,v) at each of a plurality of samplings t. Each two-dimensional data array is weighted (44) and divided into two components. A first component processor (48) convolves a first component of each two-dimensional array with respect to u for each v. A second component processor (50) processes a second component of each two-dimensional array (FIG. 6) including weighting each component with a geometrically dependent weighting function W from a weighting function computer (46). The processed first and second components are combined (52) and backprojected (54).
|
申请公布号 |
US5625660(A) |
申请公布日期 |
1997.04.29 |
申请号 |
US19950497296 |
申请日期 |
1995.06.30 |
申请人 |
PICKER INTERNATIONAL, INC. |
发明人 |
TUY, HEANG K. |
分类号 |
A61B6/03;G06T1/00;G06T11/00;(IPC1-7):A61B6/03 |
主分类号 |
A61B6/03 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|