Advances in CT IV: 4th International Scientific User Conference SOMATOM PLUS CT Rotterdam, March 1998
Gabriel P. Krestin, Gary M. Glazer
Springer Berlin Heidelberg, Jun 2, 1998 - Medical - 242 pages
We are in the midst of major advances in medical imaging, converting static pre sentation of anatomic information into near real-time interactive imaging and displays capable of depicting both structure and function. This will have pro found impact on diagnosis and image-guided therapies. These advances have been most notable in the modalities of computed tomog raphy and magnetic resonance. These technologies have become capable of ac quiring volumetric images in short periods of time. Speed gains in MRI were very significant in the early 1990s with the development of clinically usable pulse se quences for gradient-recalled and echo-planar imaging. It appears that further speed gains in MRI will be difficult to achieve. The development of spiral CT has ushered in an era in which major speed gains in CT are also possible. This has enabled creation of new types of applica tions such as CT angiography, which has already come to replace catheter angio graphy at many medical centers throughout the world. We are very pleased that the results from industrial and academic laboratories have been transferred to the bedside to improve patient care at a speed that may be faster than in any other area of medicine. Concurrent with advances in CT technology there have been dramatic strides in the performance characteristics and costs of computer hardware and software.
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Relationships Between Time Dose and Quality in Helical CT
Improvement of CT Performance by UFC Detector Technology
Dose Reduction vs Image Quality in Spiral
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abdominal algorithm anatomical aneurysms aorta aortic aortic dissection arrow arterial phase artifacts assessment attenuation axial biopsy bolus tracking brachiocephalic veins calcification cardiac cardiac cycle cerebral cerebral aneurysms chest clinical collimation computed tomography contrast material contrast medium conventional CT CT angiography CT fluoroscopy CT images CT scanners CT scans CT-guided curve data set Department of Radiology detection detector diagnostic display dose reduction enhancement evaluation examinations Fishman EK fluoroscopy fractures gantry helical CT hepatic image noise image quality improved injection lesions liver lung metastasis ml/s multiplanar musculoskeletal needle optimal pancreatic parenchymal patients performed perfusion phantom pixel noise plane procedures protocols pulmonary angiography pulmonary embolism puncture Radiol Radiology real-time reconstruction renal rotation scintigraphy slice collimation Somatom spatial resolution spiral scan structures Table three-dimensional rendering threshold tion tissue tube current modulation tumor vascular venous vessels visualisation volume rendering voxels workstation X-ray