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X-ray tube. The major components of an X-ray tube are shown in Fig. 2.1, all of which are enclosed in an evacuated envelope. The major compo-nents of an X-ray tube include the cathode assembly and the anode assembly. The cathode assembly contains a lament that emits electrons when heated with current.
The X-ray source radiation Io passes through the object (the body) and is modulated by the body tissues (μ.d) on its way. This modulated radiation beam Ix interacts with the detector, where the modulated radiation is transformed into modulated light – the X-ray image. The contrast of the image depends on the energy of the X-ray beam.
• An entirely new chapter on X-ray imaging has been included. • The chapter dealing with kinematical diffraction has been divided into two separate chapters, which deal with non-crystalline and crystalline materials, respectively.
Distribution of X-ray dose from the Tube through the Patient to the X-ray film. Production of X-rays and Bremsstrahlung (stopping radiation) – thermal electron emission in vacuum (10-6 mbar) and target bombardment.
This article reviews the topic of x-ray production and control of the x-ray beam quality and quantity through the use of x-ray tubes, x-ray generators, and beam-shaping devices. Part 2 of this series investigates the characteristics of x-ray interactions, the formation of the projection image, image contrast, signal-to-noise ratio, and ...
Schematic diagram of x-ray tube and circuit. Filament is heated, releasing electrons via thermionic emission (Vf ~ 10V, If ~ 4A, resulting in T>2000oC) X rays are produced by high-speed electrons bombarding the target. Typically < 1% of energy is converted to x rays; the rest is heat.
2. Name the four principle parts of the x-ray tube. a. b. c. d. 3. Now write an important detail about each component above.
