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Published byLucy Newton Modified over 9 years ago
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Linear accelerator in medicine XR Tubes Particles Accelerators Betatron Cyclotron Synchrocyclotron Synchrotron Linear accelerator
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Photon Beam (X-Ray): 4 MV To 22 MV. Single Beam. Duel Beams Electron Beam: Multi-Beams with energy grope between: 4- 22 MeV. Medical Linear accelerator
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Linac : Linear accelerator The linear accelerator is a device that uses high- frequency electromagnetic waves to accelerate charged particles such as electrons to high energies through a linear tube. There are several types of linear accelerator designs, but the ones used in radiotherapy accelerate electrons either by traveling or stationary electromagnetic waves of frequency in microwave region (≈ 3000 megacycles/sec).
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The difference between traveling wave and stationary wave accelerators is Functionally the design of the accelerator structure the traveling wave structures require a terminating, or "dummy", load in order to absorb the residual power at the end of the structure, the standing wave structures provide maximum reflection of the waves at both ends of the structure thus preventing a backward reflected wave the combination of forward and reverse traveling waves will give rise to stationary waves.
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Medical Linear accelerator Treatment Head (Straight Beam) Power Supply Modulator Electron Gun Magnetron Or Klystron Wave Guide system Treatment Head (Bent Beam) Bending Magnet Accelerator Tube A block diagram of typical medical Linear Accelerator
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The major components of medical Linear Accelerator Power Supply Modulator Magnetron Or Klystron Electron Gun Wave Guide system Accelerator Tube Bending Magnet Treatment Head (Straight Beam) Treatment Head (Bent Beam)
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Electron Gun Flatining Filter Cros Section of Accelerator tube Modulator
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A power supply Provides DC power to the modulator Modulator the magnetron or klystron Deliver the pulses to the electron gun Pulsed microwaves the accelerator tube or structure via a waveguide systems. electrons
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تصميم المسرعات الخطية الطبية
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أنبوب التسريع موازٍ لمحور الحزمة
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أنبوب التسريع متعامد مع محور الحزمة
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أنبوب التسريع خارج غرفة المعالجة
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Linear accelerator 4 Groups The accelerator The table The collimator multilames Portale Imaging
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Electron Gun
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الأجزاء الرئيسية المسرع الخطي مدفع الإلكترونات المسرّع حزمة الإلكترونات مجموعة الإنحراف الكهرطيسية الـهدف حجيرات التأين المحددات الحزمة الإشعاعية
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آلية اصدار الفوتونات المسرع حزمة الإلكترونات الهدف مرشح تسوية الحزمة حجيرة التأين محددات الحزمة حزمة الفوتونات حامل الحمايات
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آلية اصدار الإلكترونات المسرع حزمة الإلكترونات وشائع التبعثر حجيرة التأين محددات الحزمة حزمة الإلكترونات محددات إضافية
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Siemens Varian Elekta
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