Single-session Gamma Knife radiosurgery for optic pathway ...
Gamma knife radiosurgery
-
Upload
radiotherapist90 -
Category
Health & Medicine
-
view
380 -
download
3
Transcript of Gamma knife radiosurgery
![Page 1: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/1.jpg)
In the name of God
by:E. GhasemloyZ. Mansouri
Z.DoorandishE.Maroofzade
Shahid beheshti university of medical science
Gamma Knife radiosurgery
![Page 2: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/2.jpg)
Shahid beheshti university of medical science 2
![Page 3: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/3.jpg)
Gamma knife today the first Gamma Knife in 1968
Shahid beheshti university of medical science
![Page 4: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/4.jpg)
Gamma knife statistics
• 120 gamma knife worldwide• Over 20000 patients treated annually
Shahid beheshti university of medical science 4
![Page 5: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/5.jpg)
introduction
• Gamma Knife radiosurgery, also called stereotactic radiosurgery.
• Even though it is called surgery; a Gamma Knife procedure does not involve actual surgery, nor is the Gamma Knife really a knife at all.
Shahid beheshti university of medical science 5
![Page 6: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/6.jpg)
Technical overview
• There are five current versions of the Leksell Gamma Knife :
• U• B• C• 4C• perfexion
Shahid beheshti university of medical science 6
![Page 7: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/7.jpg)
• . Each system consists of six components:• the radiation unit• the beam-focusing technology • the patient couch• an electric bed system• the control console• the planning computer system.
Shahid beheshti university of medical science 7
![Page 8: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/8.jpg)
Device details
Shahid beheshti university of medical science 8
![Page 9: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/9.jpg)
prefextionFigure : Diagrams of the PERFEXION Gamma Knife radiation unit and collimator system. A) Cross section of the Leksell Gamma Knife PERFEXION radiation unit. B) Each sector holds 24 60Co sources and can be moved independently on other sectors to the desired position to define collimator size or block groups of beams. C) Sector position in 4 mm collimator. D) Sector position in 8 mm collimator. E) Sector position in 16 mm collimator.
Shahid beheshti university of medical science 9
![Page 10: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/10.jpg)
• 201 cobalt gamma ray beam sources are arrayed in a hemisphere and aimed through a collimator to a common focal point.
• The patient’s head is positioned within the Gamma Knife so that the tumor is in the focal point of the gamma rays.
Shahid beheshti university of medical science 10
![Page 11: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/11.jpg)
Shahid beheshti university of medical science 11
![Page 12: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/12.jpg)
Shahid beheshti university of medical science 12
![Page 13: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/13.jpg)
Gk treatment clinical process
Shahid beheshti university of medical science 13
![Page 14: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/14.jpg)
Shahid beheshti university of medical science 14
![Page 15: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/15.jpg)
Advantages
• Precision• Safety• Effectiveness• Technologically advanced• …
Shahid beheshti university of medical science 15
![Page 16: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/16.jpg)
The Leksell Gamma Knife Perfexion offers a non-invasive, two to four hour procedure that often allows the patient to leave the center the same day.
Shahid beheshti university of medical science 16
![Page 17: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/17.jpg)
What disorders can the Gamma Knife treat?
• Malignant tumors • Arteriovenous malformations (AVM)• Acoustic Neuroma• Parkinson's disease• Familiar tremor• Trigeminal neuralgia
Shahid beheshti university of medical science 17
![Page 18: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/18.jpg)
preparing
• Frame fitting• Imaging• Dose planning
Shahid beheshti university of medical science 18
![Page 19: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/19.jpg)
How is Gamma Knife Surgery performed?
• Step 1: A stereotactic head frame is attached to the head with local anesthesia
Shahid beheshti university of medical science 19
![Page 20: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/20.jpg)
• Step 2: The head is imaged using a MRI or CT scanner while the patient wears the stereotactic frame.
Shahid beheshti university of medical science 20
![Page 21: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/21.jpg)
Step 3: A treatment plan is developed using the images. Key point: very accurate delivery possible.
Shahid beheshti university of medical science 21
![Page 22: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/22.jpg)
Step 4: The patient lies on the treatment table of the Gamma Knife while the frame is affixed to the appropriate collimator.
Shahid beheshti university of medical science 22
![Page 23: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/23.jpg)
STEP 5: THE DOOR TO THE TREATMENT UNIT OPENS. THE PATIENT IS ADVANCED INTO THE SHIELDED TREATMENT VAULT. THE AREA WHERE ALL OF THE BEAMS INTERSECT IS TREATED WITH A HIGH DOSE OF RADIATION.
Shahid beheshti university of medical science 23
![Page 24: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/24.jpg)
Shahid beheshti university of medical science 24
![Page 25: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/25.jpg)
Control room
Shahid beheshti university of medical science 25
![Page 26: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/26.jpg)
Treatment Planning
• Through an iterative approach we determine:– the number of shots– the shot sizes– the shot locations– the shot weights
• The quality of the plan is dependent upon the patience and experience of the user
Shahid beheshti university of medical science 26
![Page 27: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/27.jpg)
target
Shahid beheshti university of medical science 27
![Page 28: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/28.jpg)
1 shot
Shahid beheshti university of medical science 28
![Page 29: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/29.jpg)
2 shots
Shahid beheshti university of medical science 29
![Page 30: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/30.jpg)
3 shots
Shahid beheshti university of medical science 30
![Page 31: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/31.jpg)
4 shots
Shahid beheshti university of medical science 31
![Page 32: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/32.jpg)
5 shots
Shahid beheshti university of medical science 32
![Page 33: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/33.jpg)
What are the risks?
• Swelling of the brain• Headache• Nausea• Numbness
Shahid beheshti university of medical science 33
![Page 34: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/34.jpg)
…The risks
• Hair loss near treated area (generally temporary)
• Seizures• Weakness• Loss of balance• Vision problems
Shahid beheshti university of medical science 34
![Page 35: Gamma knife radiosurgery](https://reader036.fdocuments.in/reader036/viewer/2022062418/5563c93cd8b42abe468b4e3a/html5/thumbnails/35.jpg)
Shahid beheshti university of medical science