Image guided radiation therapy (IGRT)

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Radiation therapy is the most safest and effective choice of cancer treatment today,only because of the IGRT

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Image guided radiation therapy (IGRT)

  1. 1. Image-Guided Radiation Therapy MUHAMMED ANEES.K MSc RADIATION PHYSICS UNIVERSITYOF CALICUT 1
  2. 2. The process of frequent imaging (2D / 3D), before and during course of radiation treatment merit static & mobile targets 2
  3. 3. or I G - I M R T or I G R T 3
  4. 4. 4 Elekta's Synergy
  5. 5. 5 Varian's Trilogy
  6. 6. TREATMENT with IGRT      6
  7. 7. On-Board Imagers 7
  8. 8. ON-BOARD IMAGERS 8
  9. 9. 9
  10. 10. 10
  11. 11. 1- Portal & Radiographic Imagers (a) (b) 256 × 256 solid state detectors Two Imaging system 11
  12. 12. Electronic Portal Imaging Device (EPID)     12
  13. 13. On-board imaging EPID Cone beam CT 256 × 256 solid state detectors 13
  14. 14. See the difference OBI Gives 2-D Images 14
  15. 15. 15
  16. 16. 2- In-Room CT-Scanner 16
  17. 17. High-Resolution 3-D Patient Anatomy Help toTarget Localization Dose Distribution 17
  18. 18. 18
  19. 19. 3 Cone Beam ComputedTomography 19
  20. 20. Cone Beam Formation Cone Beam 20
  21. 21. Kilo voltage Cone-Beam CT 21
  22. 22. Mega voltage Cone-Beam CT 22
  23. 23. Advantages of Mv-CBCT over Kv-CBCT 23
  24. 24. Advantages of kV-CBCT over MV-CBCT 24
  25. 25. 25
  26. 26. 4- Helical Tomotherapy 26
  27. 27. MV-CT image Acquisition IMRT Treatment 27
  28. 28. HelicalTomotherapy 28 continue…,
  29. 29. Linac Ring Gantry Couch Multi Leaf Collimator Imaging Detector Beam Stop 29
  30. 30. 30
  31. 31. 5- ULTRASOUND  31
  32. 32. Ultrasound Systems 32
  33. 33. US 2-D or 3-D ultrasound imaging system integrated with Medical Linac BAT system 33
  34. 34. What Can we do With the Images ? or 34
  35. 35. WHY IGRT ? 35
  36. 36. WHY IGRT ? 36
  37. 37. Management of Respiratory Motion 4D- ComputedTomography Real-TimeTumorTracking 37
  38. 38. 1, 4-D Computed Tomography 38
  39. 39. 39
  40. 40. 40 4-D CT Continue…,
  41. 41. 41
  42. 42. 4-D CT Data Acquisition Prospective Gating Retrospective Gating 42
  43. 43. 43 images are collected only at one phase of the respiratory cycle Or Registration of the CT images After Data of Respiratory Phases the have been acquired 1, Prospective Gating scan data are acquired at all phases of respiration and the correlation
  44. 44. 2. Retrospective Gating 44 the beam on only at the selected times of respiration Including both Inspiration and Expiration
  45. 45. 45
  46. 46. 2, Real-TimeTumorTracking 46
  47. 47. Real-TimeTumor Tracking 47 Electromagnetic FieldTracking
  48. 48. Fluoroscopy-BasedTracking Systems These systems are discussed below as examples……., 48
  49. 49. Fluoroscopy-BasedTracking Systems 49
  50. 50. 1- Room-Mounted Systems 50
  51. 51. Room-Mounted Systems 51 continue…,
  52. 52. 2-Linac Gantry-Mounted Systems 52
  53. 53. 53
  54. 54. 3-Robotic Systems 54
  55. 55. 55
  56. 56. Conformal dose Distribution for Irregularly tumors 56
  57. 57. Electromagnetic FieldTracking 57
  58. 58. 58
  59. 59. MRI–Guided RadiationTherapy 59
  60. 60. MRI–Guided Radiation Therapy 60
  61. 61. MRI–Guided RadiationTherapy 61
  62. 62. REFERENCE  Treatment Planning in Radiation Oncology by F M Khan  Physics of RadiationTherapy (4th Edition ) by F M Khan  Overview of Image-Guided RadiationTherapy by Lei xing, Ph.D,BrianThorndyke, Ph.D ,University of Stanford  IMRT, IGRT, SBRT – Advances in theTreatment Planning and Delivery of Radiotherapy by John L. Meyer 62
  63. 63. 63

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