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首页> 外文期刊>American journal of applied sciences >Contribution of the Entropy Function to the Study of Collimator for Nuclear Medicine Imaging | Science Publications
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Contribution of the Entropy Function to the Study of Collimator for Nuclear Medicine Imaging | Science Publications

机译：熵函数对核医学成像准直器研究的贡献科学出版物

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> Scintigraphic image currently used in the diagnosis or the evaluation process of tissues, is strongly dependant on several technical parameters specially collimator characteristics. The present work describes a numerical method, based on entropy function, able to specify depth and hole diameter of collimator as well as other geometrical parameters to get a better accuracy in scintigraphy evaluation. From the classical form of the entropy function, the entropy associated with a scintigraphic acquisition has been established. Its explicit expression includes collimator characteristics and source-collimator distance. The obtained numerical results and the performed illustrations explain the interest of the entropic approach, which takes into account both multiplex effect, counting process and spatial uncertainty. Acquisitions obtained on two kinds of collimator (general use and high resolution) by use of an uniform radioactive source, confirm the efficiency of such method in the choice of appropriate collimator.
机译： >当前在组织的诊断或评估过程中使用的闪烁图像在很大程度上取决于几个技术参数，特别是准直仪的特性。本工作描述了一种基于熵函数的数值方法，该方法能够指定准直仪的深度和孔径以及其他几何参数，以在闪烁显像评估中获得更好的准确性。从经典形式的熵函数，已经建立了与闪烁显像采集相关的熵。它的明确表达包括准直器特性和源准直器距离。所获得的数值结果和所执行的图示说明了熵方法的重要性，该方法同时考虑了多重效应，计数过程和空间不确定性。通过使用统一的放射源对两种准直仪（通用和高分辨率）进行的采集，证实了这种方法在选择合适的准直仪方面的效率。

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