tomography technology


Tomography is the process by which information about an object is determined from the object’s sections or projections. Projection tomography has been used successfully for x-ray scans, positron emission tomography, and electron tomography. Tomography is imaging by sections or sectioning, through the use of any kind of penetrating wave. The method is used in radiology, archaeology, biology, atmospheric science, geophysics, oceanography, plasma physics, materials science, astrophysics, quantum information, and other areas of science.

Standardized low-resolution brain electromagnetic tomography (sLORETA): technical details
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Scalp electric potentials (EEG) and extracranial magnetic fields (MEG) are due to the primary (impressed) current density distribution that arises from neuronal post-synaptic processes. A solution to the inverse problem, ie the computation of images of electric

Electron tomography
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Some physicists may be drawn to biology because of the challenge that lies in the vast complexity of biological matter; what attracted me initially was the curious paradox that makes electron microscopy of macromolecules possible phase contrast, the contrast that

Optical biopsy and imaging using optical coherence tomography
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Medical imaging technologies can improve both the diagnosis and the clinical management of disease. Imaging modalities such as ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI) are examples of technologies that emerged from

Clinical applications of cone-beam computed tomography in dental practice
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Correlation of computed tomography and positron emission tomography in patients with metastatic gastrointestinal stromal tumor treated at a single institution
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Purpose Response Evaluation Criteria in Solid Tumors (RECIST) are insensitive in evaluating gastrointestinal stromal tumors (GISTs) treated with imatinib. This study evaluates whether computed tomography (CT) findings of GIST after imatinib treatment correlate with

In vivo human retinal imaging by Fourier domain optical coherence tomography
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We present what is to our knowledge the first in vivo tomograms of human retina obtained by Fourier domain optical coherence tomography . We would like to show that this technique might be as powerful as other optical coherence tomography techniques in the

Application of annihilation coincidence detection to transaxial reconstruction tomography
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We evaluated the coincidence detection method in terms of spatial resolution and sensitivity as a function of object depth, effect of pulse-height analysis on resolution and efficiency, correction for attenuation, overall detection efficiency, and cold spot con trast. A prototype Transmission X-ray computed tomography (TCT) has as a major emphasis anatomic description, thus spatial resolution and tissue density sensitivity are very important. X-ray TCT is also applied to examination of heart motion and the temporal changes in radioopaque contrast

Is computed tomography safe
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brain-perfusion CT when a muchlower-dose, routine head CT would have sufficed. Although it has not been shown directly that CT increases cancer risk, radiation is a known carcinogen, and extensive Ever sinee the first seismometers were plaeed on the surfaee of the Earth near the end of the 19th eentury, seismie waves have been used to loeate remote objects. The first applieations involved the loeation of earthquake epicenters in far-away regions. Efforts during the first World

Functional imaging with low-resolution brain electromagnetic tomography (LORETA): a review
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This paper reviews several recent publications that have successfully used the functional brain imaging method known as LORETA. Emphasis is placed on the electrophysiological and neuroanatomical basis of the method, on the localization properties of the method, and

Bayesian image analysis: An application to single photon emission tomography
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Image analysis embraces a wide range of image processing tasks, including blur and noise removal, segmentation and boundary finding, and object location and identification. Traditional approaches have addressed these problems on a largely

Test performance of positron emission tomography and computed tomography for mediastinal staging in patients with non small-cell lung cancer: a meta
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Purpose: To compare the diagnostic accuracy of computed tomography (CT) and positron emission tomography (PET) with 18-fluorodeoxyglucose (FDG) for mediastinal staging in patients with non small-cell lung cancer and to determine whether test results are

Prediction of vertebral body compressive fracture using quantitative computed tomography .
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We performed quantitative computed tomography in vitro on the first and third lumbar vertebrae in human cadavera using a dibasic potassium phosphate phantom for calibration. The quantitative computed- tomography numbers exhibited a significant positive Over the years a number of atom probe books have been written by various authors [1 10], so why write another one you might ask. We believe that this book is unique in specifically targeting atom probe adopters who are new to the technique. The book introduces new

Accurate measurement of liver, kidney, and spleen volume and mass by computerized axial tomography
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Computerized axial tomography permits accurate cross-sectional radiographic visualization of visceral organs. Thus, radiographic area of an organ slice can be calculated and converted to actual area from a standard grid printed on the roentgenogram. Because the

In vivo cellular optical coherence tomography imaging
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