作者: R L Clarke , G Van Dyk
DOI: 10.1088/0031-9155/18/4/005
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摘要: Two related methods are described for the determination of electron density a small selected volume within an irregular non-uniform object. The immediate medical application these is in direct measurement mineral content bone. involve manipulation two beams gamma -rays. Four intensities measured, transmitted and scattered radiation. difference between techniques lies ranges energies -rays that can be used.