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1. Introduction
2. First vs. modern CT scanner
3. Images from first and modern CT scanners
4. Modern CT scanners - 4 major venders
5. What does CT measure?
6. Fan-beam geometry
7. Spiral CT principle
8. Definition of the spiral pitch value
9. Demands on X-ray sources
10. Tube technology
11. Demands on CT detector technology
12. Multi-row detectors for multi-slice-CT 2008/2009
13. Single and double detector modules
14. Sinogram data
15. Image reconstruction
16. Data completeness
17. Filtered backprojection (FBP)
18. Backprojection: examples
19. Spiral z-interpolation for single-slice CT
20. Importance of z-interpolation
21. The cone-beam problem
22. Advanced single-slice rebinning (ASSR)
23. The ASSR algorithm
24. Patient images with ASSR
25. The pitch value
26. Motion artifacts of the heart
27. Imaging the heart with CT
28. Retrospective vs. prospective gating
29. Synchronization with the heart phase
30. Cardiac CT is phase-selective
31. 4 dimensions display of the human heart
32. Image of prospective gating scan
33. Multi-threaded CT scanners and dual-source-CT
34. Image of retrospective gating scan
35. Coronary artery scan without motion artifacts
36. Dual source CT scan
37. Image quality and dose
38. What is displayed in CT images?
39. The 'window technique'
40. Spatial resolution (1)
41. Spatial resolution (2)
42. Spatial resolution (3)
43. Image noise
44. Patient dose in CT
45. Dependencies of IQ and dose
46. Strategies for dose reduction
47. Reconstruct thin but view thick (1)
48. Reconstruct thin but view thick (2)
49. Tube current modulation
50. Dose reduction by tube current modulation
51. Multidimensional adaptive filtering - MAF (1)
52. Multidimensional adaptive filtering - MAF (2)
53. Patient size vs. mAs at constant noise (1)
54. Patient size vs. mAs at constant noise (2)
55. Thank you

Topics Covered

• Technical basics of clinical X-ray CT
• From single-slice to multi slice
• The CT hardware
• Mechanics
• X-ray source and X-ray detector technology
• Image reconstruction of circular, sequential and spiral CT
• Specific applications
• Dose reduction strategies

Links

Series:

• Medical Imaging

Categories:

• Clinical Practice
• Methods

Talk Citation

Publication History

• Published on October 10, 2010
• Reviewed on January 23, 2022

Financial Disclosures

• Prof. Marc Kachelrieß has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.