BACKGROUND: Single photon emission computed tomography (SPECT) following injection of radiotracer during a seizure is known as ictal SPECT. Comparison of an ictal SPECT study to a baseline or interictal study can aid identification of a seizure focus. CASE PRESENTATION: A young woman with encephalitis and refractory seizures underwent brain SPECT during a period of frequent seizure-like episode...

An opt ica l imaging sys tem provides automatic co-registration of a plurality of multi spectral images of an object which are generated by a plurality of video cameras or other optical detectors. The imaging system includes a modular assembly of beam splitters, lens tubes, camera lenses and wavelength selective filters which facilitate easy reconfiguration and adjustment of the system for vari...

By definition, as they require the images to merge to be superimposable, « pixel to pixel » fusion processes raise up the issue of the outcome of geometric co-registration quality on the resulting images. Indeed, local errors of geometric co-registration may introduce local errors in the merging process. Hence, we can wonder how can we define and reach the coregistration quality level that is r...

We present a new method for the detection and measurement of volume changes in human hippocampi in serial Magnetic Resonance Imaging (MRI). The method follows a two-stage approach: (1) precise co-registration and intensity matching of the initial (baseline) and follow-up scan, and (2) refinement and segmentation propagation of the hippocampi outlines drawn in the baseline scan by an expert obse...

Large format digital camera (LFDC) systems are becoming more broadly available and regularly collect image data over large areas. Spectral and radiometric attributes of imagery from LFDC systems make this type of image data appropriate for semi-automated change detection. However, achieving accurate spatial co-registration between multitemporal image sets is necessary for semi-automated change ...

With the development of Building Information Modelling (BIM) and Terrestrial Laser Scanning (TLS) in the Architecture, Engineering, Construction & Facility Management (AEC/FM) industry, the registration of site laser scans and project 3D (BIM) models in a common coordinate system is becoming critical to effective project control. The co-registration of 3D datasets is normally performed in two s...

guaranty of security of juridical act about lands is an important difficulty in every country. disregarding the independence of land registration system from the system of civil law –in enactment, interpretation and amendment of the land registration rules- and disregarding bases and functions of land registration system has resulted in some mistakes made by judicial doctrine and precedent in o...

PURPOSE Myocardial perfusion is routinely measured by SPECT--this technique has a rather low spatial resolution but covers the whole myocardium and is equipped with efficient image analysis software. Cardiac MRI has higher spatial resolution than SPECT and excellent sequences for myocardial function and viability detection but the lack of easy-to-use methods of acquisition and post-processing o...

ABSTRACT: Combined usage and analysis of images from different sensors for various applications, including disaster monitoring, often needs first an image co-registration. Co-registration is based on automated matching of corresponding image features (e.g. just 10-40) and becomes very difficult when the images differ a lot. Perhaps the most difficult case is that of co-registering optical and S...