دورات هندسية

 

 

أريد معلومات عن gamma knife

النتائج 1 إلى 3 من 3
  1. [1]
    sususordo
    sususordo غير متواجد حالياً

    عضو

    تاريخ التسجيل: Jan 2007
    المشاركات: 40
    Thumbs Up
    Received: 0
    Given: 0

    أريد معلومات عن gamma knife

    السلام عليكم و رحمة الله وبركاته
    أعود بعد غياب لأطلب على خجل من منهلنا الغالي وصرحنا العالي معلوات قيمة كما عودنا
    أرجو إفادتي بمعلومات عن gamma knife و عن خطوات العملية إن أمكن ... وشكراً جزيلاً ...

    من مواضيع sususordo :


    0 Not allowed!


    لكل شيء إذا ما تم نقصان
    فلا يغر بطيب العيش إنسـان

    هي الأيام كما شاهدتها دول
    من سره زمن سأتـه أزمــان

  2. [2]
    yehia el hussein
    yehia el hussein غير متواجد حالياً
    عضو
    الصورة الرمزية yehia el hussein


    تاريخ التسجيل: Feb 2009
    المشاركات: 13
    Thumbs Up
    Received: 0
    Given: 0
    A gamma knife (or Leksell gamma knife) is a device used to treat brain tumors with a high dose of radiation therapy in one day. The device was invented by Lars Leksell, a Swedish neurosurgeon, in 1967 at the Karolinska Institute in Sweden.
    The gamma knife device contains 201 cobalt-60 sources of approximately 30 curies (1.1 TBq) each, placed in a circular array in a heavily shielded assembly. The device aims gamma radiation through a target point in the patient's brain. The patient wears a specialized helmet that is surgically fixed to their skull so that the brain tumor remains stationary at target point of the gamma rays. An ablative dose of radiation is thereby sent through the tumor in one treatment session, while surrounding brain tissues are relatively spared.
    Radiosurgery uses high doses of radiation to kill cancer cells and shrink tumors, delivered precisely to avoid damaging healthy brain tissue. Gamma knife radiosurgery is able to accurately focus many beams of high-intensity gamma radiation to converge on one or more tumors. Each individual beam is relatively low energy, so the radiation has little effect on intervening brain tissue.
    Following a year in Stockholm, Sweden with Dr. Leksell, Dr. Hernán Rodríguez of the University of Pittsburgh is responsible for bringing over Gamma Knife technology to the United States.
    Gamma knife radiosurgery has proven effective for patients with benign or malignant brain tumors, vascular malformations such as an arteriovenous malformation (AVM), pain or other functional problems.[1][2][3][4] The procedure is less invasive than alternative surgeries such as micro-decompression. For treatment of trigeminal neuralgia the procedure may be used repeatedly on patients.
    Ultimately, consideration for gamma knife radiosurgery treatment is contingent upon the patient's diagnosis, medical history and the case's overall severity upon consultation. In some instances, radiation oncologists will consider treatment for patients with metastatic disease, the elderly and whose life span will not exceed fifteen years, as well as those with inoperable lesions.
    The risks of gamma knife radiosurgery treatment are very small and complications are related to the condition being treated. ] The complication rate is increased when the method is used to treat conditions which are life threatening in the short term

    0 Not allowed!



  3. [3]
    المسلم84
    المسلم84 غير متواجد حالياً
    عضو متميز
    الصورة الرمزية المسلم84


    تاريخ التسجيل: Jul 2006
    المشاركات: 976
    Thumbs Up
    Received: 18
    Given: 24
    أخي العزيز شاهد هذا الرابط...

    هـــــــنــــــا

    لا تنسونا من صالح دعائكم....

    0 Not allowed!



    لا تنسونا من صالح دعائكم
    سبحان الله وبحمده....سبحان الله العظيم

  
الكلمات الدلالية لهذا الموضوع

عرض سحابة الكلمة الدلالية

RSS RSS 2.0 XML MAP HTML