1. The simplest approach to radiosurgery is to use a single, fixed collimator to shape the treatment field.

2. Brain metastases tumor; Stereotactic radiosurgery(SRS); Gamma knife; Whole brain radiotherapy(WBRT).

3. Cyber-knife a new stereotaxic radiosurgery instrument, which structure and technical characteristics are introduced.

4. It is the only stereotactic radiosurgery system utilizing image guidance technology and a computer-controlled robotic arm.

5. Results X knife radiosurgery can effectively treat brain malignant tumors and prolong the patient′s surviving period.

6. However, treatment will inevitably take longer: radiosurgery is paused whilst the exchange is performed and the linac must be moved around the patient with each collimator fitted.

7. The paper introduces the stereotactic radiosurgery equipment X-Knife, and the distributed features of the absorbed dose output of X-Knife briefly.

8. Objective To study the effect of radiosurgery for cavernous sinus meningioma.

9. High X-ray doses prescribed for radiosurgery must be delivered with sub-millimetre precision to avoid damaging nearby organs and healthy tissue.

10. To review and analyze the progress of stereotactic radiosurgery for trigeminal neuralgia, realize it is an effective and safe treatment for the intractable trigeminal neuralgia.

11. Medical Systems will unveil new technologies and approaches for radiotherapy and radiosurgery.

12. Objective : To explore some clinical characteristics and predictive factors for brain edema after gamma knife radiosurgery ( GKS ).

13. CyberKnife, as a unique device, integrates the arm-based robotic system carrying a compact X-band linear accelerator with image-guidance technology to perform frameless stereotactic radiosurgery.

14. The CyberKnife System has been used extensively for spine radiosurgery.

15. Objective: We report on a case of recurrent left cerebellopontine angle meningioma resulting in left occipital lobe radiation necrosis 17 months after 2 courses of gamma knife radiosurgery.

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16. Progress in frameless radiosurgical technology has enabled the application of radiosurgery to the spine.

17. Equipment technicians install, train, calibrate, and maintain a cadre of fast-evolving medical equipment, such as PET/CT scanners and robotic radiosurgery units.

18. Chen Guangyao, Cancer Center. Taipei Veterans General Hospital. Why Hypofractionated Radiotherapy and Radiosurgery Can Effectively Treat Benign and Malignant Diseases.

19. Objective: To explore the therapeutic effect and the rationality of the X knife radiosurgery for treatment of intracranial lesions.

20. Objective To observe the factors of effect in multiple brain metastasis(MBM) treated by gamma knife radiosurgery(GKS).

21. Steretactic radiotherapy treatment planning is an important part of X-knife radiosurgery.