Optimizing the acquisition time profile for a planar integral measurement system with a spinning slat collimator.
Optimizing the acquisition time profile for a planar integral measurement system with a spinning slat collimator.
复制标题
使用旋转板条准直器优化平面积分测量系统的采集时间曲线。
DOI:
10.1118/1.2008447
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发表时间:
2005
期刊:
影响因子:
3.8
通讯作者:
Zhang,B
中科院分区:
文献类型:
--
作者:
Earl,RD;Zeng,GL;Zhang,B
This article considers a hypothetical imaging device with a spinning slat collimator that measures parallel‐planar‐integral data from an object. This device rotates around the object 180° and stops at positions uniformly distributed over this 180°. At each stop, the device spins on its own axis 180° and acquires measurements at positions uniformly distributed over this 180°. For a fixed total imaging time, an optimal distribution of the scanning time among the data measurement locations is searched by a nonlinear programming method: Nelder‐Mead's simplex method. The optimal dwell time is approximately proportional to the weighting factor in the backprojector of the reconstruction algorithm. By using an optimal dwell‐time profile, the reconstruction signal‐to‐noise ratio has a gain of 23%–24% for the filtered backprojection algorithm and a gain of 10%–18% for the iterative algorithms, compared with the situation when a constant dwell‐time profile is used.
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影响因子:
2.9
作者:
Gorenstein,DG;Goldfield,EM;Chen,R;Kovar,K;Luxon,BA
通讯作者:
Luxon,BA
影响因子:
5.6
作者:
LOMONOSSOFF, GP;BUTLER, PJG;KLUG, A
通讯作者:
KLUG, A
影响因子:
2.9
作者:
Gorenstein,DG;Lai,K;Shah,DO
通讯作者:
Shah,DO
DOI:
--
发表时间:
1981
期刊:
Annual Review of Biophysics and Bioengineering
影响因子:
--
作者:
D. Gorenstein
通讯作者:
D. Gorenstein
影响因子:
64.8
作者:
ADLER, K;BEYREUTHER, K;MULLERHI.B
通讯作者:
MULLERHI.B