High speed imaging of dynamic processes with a switched source x-ray CT system
High speed imaging of dynamic processes with a switched source x-ray CT system
复制标题
使用开关源 X 射线 CT 系统对动态过程进行高速成像
DOI:
10.1088/0957-0233/26/5/055401
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发表时间:
2015
影响因子:
2.4
通讯作者:
Thompson W
中科院分区:
文献类型:
--
作者:
Thompson W
Conventional x-ray computed tomography (CT) scanners are limited in their scanning speed by the mechanical constraints of their rotating gantries and as such do not provide the necessary temporal resolution for imaging of fast-moving dynamic processes, such as moving fluid flows. The Real Time Tomography (RTT) system is a family of fast cone beam CT scanners which instead use multiple fixed discrete sources and complete rings of detectors in an offset geometry. We demonstrate the potential of this system for use in the imaging of such high speed dynamic processes and give results using simulated and real experimental data. The unusual scanning geometry results in some challenges in image reconstruction, which are overcome using algebraic iterative reconstruction techniques and explicit regularisation. Through the use of a simple temporal regularisation term and by optimising the source firing pattern, we show that temporal resolution of the system may be increased at the expense of spatial resolution, which may be advantageous in some situations. Results are given showing temporal resolution of approximately 500 µs with simulated data and 3 ms with real experimental data.
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影响因子:
3.8
作者:
SIDDON, RL
通讯作者:
SIDDON, RL
影响因子:
2.1
作者:
Betcke M
通讯作者:
Betcke M
DOI:
--
发表时间:
2004
期刊:
IEEE Symposium Conference Record Nuclear Science 2004.
影响因子:
--
作者:
T. Köhler
通讯作者:
T. Köhler
影响因子:
2.1
作者:
Betcke M
通讯作者:
Betcke M