Count-rate statistics of the gamma camera.

Count-rate statistics of the gamma camera.
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伽马相机的计数率统计。

DOI:
10.1088/0031-9155/43/10/019
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发表时间:
1998
影响因子:
3.5
通讯作者:
H. Luig
H. Luig
中科院分区:
工程技术2区
文献类型:
--
作者:
U. Engeland;T. Striker;H. Luig

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由于死时间效应,伽马相机在“列表模式”中记录的衰变事件的时间分布不同于泊松分布。我们提出了一个新的模型的死区时间的伽马相机的行为。我们的模型的最重要的特点是,由于所谓的“堆积”效应,事件的损失发生在成对或更高的倍数。我们分析的后果堆积的伽马相机记录的事件的时间分布。由相机记录的事件之间的时间间隔的概率分布从第一原理计算。我们构造新分布的参数估计。我们区分总计数率的估计和总计数率的某个子集的估计。计算机模拟证实,我们的估计是由死区效应比标准估计的影响较小。
The temporal distribution of decay events recorded by a gamma camera in 'list mode' differs from the Poisson distribution because of dead-time effects. We propose a new model for the dead-time behaviour of a gamma camera. The most important feature of our model is that the loss of events occurs in pairs or higher multiples due to the so-called 'pile-up' effect. We analyse the consequences of pile-up for the temporal distribution of events recorded by a gamma camera. The probability distribution for the time intervals between events recorded by the camera is calculated from first principles. We construct estimators for the parameter of the new distribution. We distinguish between the estimation of the total count rate and the estimation of a certain subset of the total count rate. Computer simulation confirms that our estimators are less influenced by dead-time effects than the standard estimator.
DOI: --
发表时间: 1989-09
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
作者:
T. Lewellen;A. Bice;K. R. Pollard;J. Zhu;M. E. Plunkett
通讯作者: T. Lewellen;A. Bice;K. R. Pollard;J. Zhu;M. E. Plunkett
用于正电子发射断层扫描的二维位置敏感探测器的高计数率性能。
DOI: 10.1088/0031-9155/34/4/003
发表时间: 1989
影响因子: 3.5
作者:
Mankoff,DA;Muehllehner,G;Karp,JS
通讯作者: Karp,JS