Abstract
The development of cryogenic sample preparations, subcellular image quantification schemes, and correlative confocal laser scanning microscopy and ion microscopy have made dynamic SIMS a versatile tool in biology and medicine. For example, ion microscopy can provide much needed, novel information on calcium influx and intracellular calcium stores at organelle resolution in normal and transformed cells in order to better understand the altered calcium signaling in malignant cells. 3-D SIMS imaging of cells revealed dynamic gradients of calcium in cells undergoing mitosis and cytokinesis. Studies of subcellular localization of anticancer drugs is another area of research where ion microscopy can provide novel observations in many types of cancers. Ion microscopy is already an essential tool in boron neutron capture therapy (BNCT) of brain cancer as it can be used to quantitatively image the subcellular location of boron in cells and tissues. This information is critically needed for testing the efficacy of boronated agents and for calculations of radiation dosimetry.
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