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Technological Advances in CT
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Introduction
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The Four Generations of CT scanners
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First-Generation CT Scanners
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Second-Generation CT Scanners
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Third-Generation CT Scanners
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Fourth-Generation CT Scanners
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Early Scanner Limitations
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Developments that Led to Helical Imaging
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Continuous Rotation
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Improvement in X-ray Tubes
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Improvement in X-ray Tubes continued
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Improvement in Reconstruction Algorithms
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Helical Imaging
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Pitch on Single-Row Detector Scanners
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Benefits of Helical Imaging
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Complete scans in a single breath-hold
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Improved data sets for post-processing
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Arbitrary slice positioning
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Improved emergent care
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Multi-row Detector CT
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Multi-row Detector CT continued
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Examples
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Pitch on Multi-row Detector Scanners
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Reconstruction Algorithm on Multi-row Detector Scanners
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Reconstruction Algorithm continued
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Benefits of Multi-row Detector CT
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Stroke Evaluation
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Carotid CTA
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IV contrast delay timing less critical during CTA studies
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Contrast Optimization for MDCT
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Factors That Affect Scan Timing
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Factors That Affect Scan Time Continued
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Shorter breath-holds possible
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Pulmonary Embolus
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Increased applications with total body screening
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Lung Cancer Screening
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Cardiac CT
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Virtual Colonoscopy
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Improvements to long CTA runs
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Peripheral CTA
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Electron Beam CT
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Benefits of EBCT
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Other CT Developments
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Future Directions
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