Technical Aspects of Cardiac CT - ImPACT CT Scanner Evaluation ...

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Godfrey Hounsfield – Nobel Speech 1979 A further promising field may be the detection of the coronary arteries. It may be possible to detect these under special conditions of scanning. Harefield Cardiac Course
Applications of cardiac CT • Calcium scoring – calcified plaque • Coronary CT angiography (CTA) – Coronary artery anatomy – Stenosis – Stent viability – Graft anatomy and patency • Functional imaging Harefield Cardiac Course
Page 1 and 2: Technical Aspects of Cardiac CT S.
Page 3: Cardiac CT • Godfrey Hounsfield,
Page 7 and 8: Modern multi-slice scanners • 199
Page 9 and 10: The scanner Y Y X X Z Z Typical det
Page 11 and 12: Beam width, detectors and slices
Page 13 and 14: Scanner rotation speeds 0.3 Second
Page 15 and 16: Helical (spiral) scanning • Conti
Page 17 and 18: Helical (spiral) scanning - pitch p
Page 19 and 20: Harefield Cardiac Course
Page 21 and 22: • Analytical techniques Image rec
Page 23 and 24: • Volume set of data Image presen
Page 25 and 26: • Heart rate The heart - Average
Page 27 and 28: Cardiac CT - ECG phases • To ‘f
Page 29 and 30: Cardiac CT - ECG phases • 2 defin
Page 31 and 32: Cardiac CT - ECG phases • For hig
Page 33 and 34: Cardiac CT - scan modes Scan Axial
Page 35 and 36: Cardiac CT- axial scanning • Imag
Page 37 and 38: Cardiac CT - axial scanning with pa
Page 39 and 40: Cardiac CT - helical scanning • S
Page 41 and 42: 0% 5% 10% 15% 20% 25% 30% 35% 40% 4
Page 43 and 44: Helical cardiac CT- ECG dose modula
Page 45 and 46: Helical cardiac CT - pitch • Gant
Page 47 and 48: Helical cardiac CT - pitch • Requ
Page 49 and 50: Technical Aspects of Cardiac CT •
Page 51 and 52: Techniques to improve temporal reso
Page 53 and 54: Multi-sector reconstruction • Use
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Multi-sector reconstruction • Two
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Multi-sector reconstruction 2 secto
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Multi-sector reconstruction - issue
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Multi-sector reconstruction - issue
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Two tubes - Siemens Dual Source •
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Challenges in imaging the heart - v
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Volume coverage • Scanner detecto
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Volume coverage • Motion needs to
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• Heart rate The heart - Average
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Volume coverage - axial scan • Nu
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Philips Brilliance iCT 8 cm coverag
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Volume coverage - overlap • Small
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Volume coverage - single beat • S
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Volume coverage - single beat high
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• Improved temporal resolution -
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Image quality issues - spatial reso
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Double sampling - Z-axis • 32 det
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Spatial resolution - Z-axis • Min
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Spatial resolution - display • Op
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Cardiac CT - scan modes Scanning mo
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What do you need on a cardiac scann
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• This talk and others - www.impa
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Technical Aspects of Cardiac CT S.
Page 101:
Cardiac scanner spatial resolution
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