Imobilazation Device

Any device that helps to maintain the patient in a fixed position called Immobilization devices

1. Immobilization devices MUHAMMED ANEES.K

2. Definition Any device that helps to maintain the patient in a fixed position Immobilization devices Prevent the patient movement from treatment to treatment over a course of radiotherapy

3. Examples

4. Examples

5. Examples

6. Examples

7. Examples

8. Examples

9. Vac - Loc Vac-Loc

10. Main: To limit the patient movement To reduce the probability of positioning errors Incidental benefits: Radiation in daily set up time Radiation in patient’s fear and worry No need for patient to be awake, alert & co-operate Conversion into a rigid body Vac Lock

11. Characteristics of Vac -Lock Easy to use Easy to constructing the device Patient Comfort: Fully comfortable and relaxed position All movements be constrained Device conforms to the patient’s external surface contours The device be appropriate to the particular patient (e.g. obese) and anatomy(e.g. abdomen) under treatment.

12. Washable Reusable

13. Comfort & stability

14. Thermoplastics

15. Thermoplastics It is a soft & flexible material, almost like a Cloth When it soaked in a warm water , It becomes soft & flexible state Plastic can be stretched around any part of the patient’s body Once it cools , It becomes rigid again & maintain its new shape

16. Head & Neck case

17. Head Rests comfortable support for head used to get body parts in way of the beam or into a better position

18. Maxillary antrum tumors- -patient's head positioned with chin hyper extended to include the superior extent of the maxillary antrum in the anterior field without including the eye. Why Head Rests?

19. Pituitary or small brain tumors head positioned with neck in extreme flexion Anterior beam can avoid the dose-limiting structures such as the optic chiasm, the retina, and much of the brain tissue Why Head Rests?

20. Increased stability, Reproducible Position High Precision of Immobilization Head Rests

21. Upper limb positioning Arm best treated with 90 degree extension & treatment couch rotated 90 degrees Axis of the arm aligned with the axis of gantry rotation for planning & delivering precise isocentric treatment

22. Patient elevation systems Tilt board

23. Patient Elevation Systems 1. Tilt board Severe obesity lung disease Built-in hand grips or arm supports that provide comfortable and reproducible arms-up support. Used for treating lung cancer through lateral fields without the interference of arms or shoulders.

24. Tilt board

25. Breast Board

26. Breast Board Arm support to bring the arm above the shoulders & out of the lateral field Provide unobstructed access to the breast

27. Breast Board Used in the treatment of breast cancer with parallel opposed tangential fields . Advantages: Provides arm support to bring the arm above the shoulders and out of the way of the lateral field. Allows the patient to be positioned with the chest wall horizontal avoiding angulation of the collimator. Takes advantage of gravity to pull the large breast down into a better treatment position.

28. breast board

29. Modern Breast Board Rigid plastic. wide range of indexed tilt angles . The back support includes a head holder. It is cut away to prevent interference with the tangential field for steep beam angles. Also contains an arm support system.

30. 1,Wing board It Comfortably Supports The Patients Arms During Treatment Eg : Breast, Lung,Thorax .

31. Thick mattress for supporting the patient prone with a window cutout for the patient's belly. provide more comfort and stability in the prone position (obese patient) . Reduces the amount of intestine in the lateral radiation 2,Belly board

32. Belly board

33. Bite Block To treat the patient with the mouth open OR To move the tongue away from the target volume during treatment Bite Block Maintaining the mouth in the open position Ensuring that the tongue remains depressed

34. Bite Block

35. Base Plate

36. Base Plate Base plate for a reproducible positioning of all body regions Made of a low density carbon fibre laminate sandwich structure Excellent dosimetric properties ( minimum attenuate the beam ) Indexing bar-the two pin indexing bar is designed for reproducible positioning & stable fixation of base plates on the treatment couch

37. Prone Position

38. Goal of Immobilization Devices PRECISION/ACCURACY Limit patient movement REPRODUCIBILITY Reduce daily shifts PATIENT COMFORT Increase acceptance

39. T h a n k Y o u v e r y m u c h f o r y o u r a t t e n t i o n !