Computed Tomography: Principles, Design, Artifacts, and Recent Advances
X-ray computed tomography (CT) has experienced tremendous growth in recent years, in terms of both basic technology and new clinical applications. This book provides an overview of the evolution of CT, the mathematical and physical aspects of the technology, and the fundamentals of image reconstruction using algorithms. It examines image display from traditional methods through the most recent advancements, and it discusses key performance indices, theories behind the measurement methodologies, and different measurement phantoms in image quality. General descriptions and different categories of artifacts, their causes, and their corrections are considered at length.
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TABLE OF CONTENTS
Major Components of the CT Scanner
Appearances Causes and Corrections
approach attenuation coefficient axis beam-hardening cardiac cardiac cycle Chapter clinical collimator computed tomography cone beam contrast CT image CT number CT scan CT scanners CT system data acquisition detection detector cell detector channel detector rows discussed distance dose electron energy equation example fan beam fan beam reconstruction Figure filtered projection fluoroscopy Fourier transform frequency gantry rotation helical pitch helical scan Hsieh Illustration image artifacts image quality image reconstruction impact intensity interpolation iso-center iterative reconstruction jection line integrals linear low-contrast matrix measured motion multislice CT noise patient performed phantom Phys pixel produced projection angle projection samples radiation Radiology recon reconstructed image reconstruction algorithms reconstruction plane reduced region scattered shown in Fig signal simulation single-slice sinogram slice thickness spatial resolution step-and-shoot mode tion volume weighting function width x-ray beam x-ray flux x-ray focal spot x-ray photons x-ray source x-ray tube