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

1. Image-Guided
Radiation Therapy
MUHAMMED ANEES.K
MSc RADIATION PHYSICS
UNIVERSITYOF CALICUT
1

2. The process of frequent imaging (2D / 3D),
before and during course of radiation treatment
merit
static &
mobile
targets 2

3. or
I
G
-
I
M
R
T
or
I
G
R
T
3

4. 4
Elekta's Synergy

5. 5
Varian's Trilogy

6. TREATMENT with IGRT





6

7. On-Board
Imagers
7

8. ON-BOARD IMAGERS
8

9. 9

10. 10

11. 1- Portal & Radiographic Imagers
(a)
(b)
256 × 256
solid
state
detectors
Two
Imaging
system
11

12. Electronic Portal Imaging Device (EPID)




12

13. On-board
imaging
EPID
Cone beam CT
256 × 256
solid
state
detectors
13

14. See the
difference
OBI
Gives 2-D
Images
14

15. 15

16. 2- In-Room CT-Scanner
16

17. High-Resolution
3-D Patient Anatomy
Help toTarget
Localization
Dose Distribution
17

18. 18

19. 3 Cone Beam ComputedTomography
19

20. Cone Beam Formation
Cone Beam
20

21. Kilo voltage Cone-Beam CT
21

22. Mega voltage Cone-Beam CT
22

23. Advantages of Mv-CBCT over Kv-CBCT
23

24. Advantages of kV-CBCT over MV-CBCT
24

25. 25

26. 4- Helical Tomotherapy
26

27. MV-CT
image
Acquisition
IMRT
Treatment
27

28. HelicalTomotherapy
28
continue…,

29. Linac
Ring Gantry
Couch
Multi Leaf
Collimator
Imaging Detector
Beam Stop
29

30. 30

31. 5- ULTRASOUND

31

32. Ultrasound Systems
32

33. US
2-D or 3-D ultrasound
imaging system
integrated with
Medical Linac
BAT system
33

34. What Can we do With the Images ?
or
34

35. WHY IGRT ?
35

36. WHY IGRT ?
36

37. Management of Respiratory Motion
4D- ComputedTomography Real-TimeTumorTracking
37

38. 1, 4-D Computed Tomography
38

39. 39

40. 40
4-D CT Continue…,

41. 41

42. 4-D CT Data Acquisition
Prospective Gating Retrospective Gating
42

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. 2. Retrospective Gating
44
the beam on
only at the
selected times of
respiration
Including
both
Inspiration
and
Expiration

45. 45

46. 2, Real-TimeTumorTracking
46

47. Real-TimeTumor Tracking
47
Electromagnetic
FieldTracking

48. Fluoroscopy-BasedTracking Systems
These systems are discussed below as examples…….,
48

49. Fluoroscopy-BasedTracking Systems
49

50. 1- Room-Mounted Systems
50

51. Room-Mounted Systems
51
continue…,

52. 2-Linac Gantry-Mounted Systems
52

53. 53

54. 3-Robotic Systems
54

55. 55

56. Conformal dose
Distribution for
Irregularly tumors
56

57. Electromagnetic FieldTracking
57

58. 58

59. MRI–Guided RadiationTherapy
59

60. MRI–Guided Radiation Therapy
60

61. MRI–Guided RadiationTherapy
61

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
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63. 63