Distortion Correction in Scanning Transmission Electron Microcopy with Controllable Scanning Pathways

Distortion Correction in Scanning Transmission Electron Microcopy with Controllable Scanning Pathways

Quantitative intensity and distance measurements in atomically resolved scanning transmission electron microscopy (STEM) imaging relies on the precision of the intensity and position of the images corresponding to the scanned sample area. Conventional STEM rastering modes are limited by drift distortion in the slow scan direction. It has been realized that the scan direction is a parameter that...

Attenuation correction in myocardial perfusion SPECT using sequential transmission - emission scanning with 99mTc [Persain]

Introduction: Nowadays, Imaging of the myocardial perfusion (MPI) using the single photon emission tomography (SPET) in the diagnosis of coronary artery disease, especially myocardial ischemia, is of great importance. In contrast to the coronary artery angiography, MPI is non-invasive, less expensive and more physiological. Unfortunately, this image is affected by the some artifacts. Thes...

Joint denoising and distortion correction of atomic scale scanning transmission electron microscopy images

Nowadays, modern electron microscopes deliver images at atomic scale. The precise atomic structure encodes information about material properties. Thus, an important ingredient in the image analysis is to locate the centers of the atoms shown in micrographs as precisely as possible. Here, we consider scanning transmission electron microscopy (STEM), which acquires data in a rastering pattern, pi...

15. Scanning Transmission Electron Microscopy

Elemental mapping in scanning transmission electron microscopy

We discuss atomic resolution chemical mapping in scanning transmission electron microscopy (STEM) based on core-loss electron energy loss spectroscopy (EELS) and also on energy dispersive X-ray (EDX) imaging. Chemical mapping using EELS can yield counterintuitive results which, however, can be understood using first principles calculations. Experimental chemical maps based on EDX bear out the t...