FIGURE 6
From: Beryllium Detection in Human Lung Tissue using Electron Probe X-Ray Microanalysis
Highly magnified image and X-ray maps of beryllium particle within a granuloma. First panel, top row: negative backscattered electron image, showing bright particle on gray background. Square denotes particle. Second panel: beryllium X-ray map showing strong signal in region of particle. Third panel: carbon X-ray map. In the region of the beryllium particle, no signal is present. Fourth panel: beryllium and carbon X-ray maps expressed as a ratio. There is a suggestion of peak intensity in the region of the beryllium particle. First three panels, second row: X-ray maps for oxygen, phosphorus, and sulfur, respectively. In the region of the beryllium particle, no signal is present. Fourth panel: X-ray map for chlorine. First panel, bottom row: EDXA spectrum from reference point (circle), showing carbon and oxygen but no beryllium. Second panel: EDXA spectrum from particle (square), showing carbon, oxygen, and beryllium. The beam dwell time for the field encompassing the circle and small box is 10 seconds per pixel, whereas dwell time for the remainder of image is 1 second per pixel.
