Processing of secondary ion microscope images: an example of application to the thyroid
1989
SUMMARY
Ion microscopy is a microanalytical method by which one can obtain distribution images of any chemical element with isotope discrimination even at very low local concentrations, in successive slices of the specimen. These images are obtained at the price of progressive erosion of the specimen, so that the analysis may not be replayed and it is necessary to record the maximum amount of information during specimen erosion.
We present an improvement of this method using a highly sensitive camera connected to a video analog-digital converter. The images are acquired and digitized on line and may be processed by an image computer.
We illustrate the technique described with an application of ion microscopy that is made possible by digital recording and processing of images. This application concerns the precise comparison of iodine isotopes and phosphorus distributions in sections of the thyroid gland of rats which were submitted to an iodine-deficient diet followed by an injection of 129 I.
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