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Using X-Rays in Medical Practice - Coursework Example

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The paper "Using X-Rays in Medical Practice" focuses on the critical analysis of the major issues concerning the use of X-rays in medical practice. When an external source of energy is applied to an atom, the atom absorbs energy. The absorbed energy causes ionization and/or excitation of an atom…
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Using X-Rays in Medical Practice
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The produced photon has the same wavelength and frequency as the absorbed energy. The wavelength reduces with the increase of absorbed energy (Zettili, 2009).
The wavelength for visible light is in the range of 750nm-400nm. X-rays wavelength is in the range of 10nm upward. The wavelength of x-rays is extremely short as compared to the wavelength of visible light. The order of absorbency for x rays from the most absorbent to the least absorbent for the following materials is as follows: copper, glass, wood, and air while the order of absorbency for visible light is as following: air, wood glass, and lastly, copper. From the list, it can be deduced that the order of absorbency of X rays is exactly vice versa to that of visible light for the mention materials (Kusky, and Cullen, 2009).
When the produced x-ray is passed through the body, some part of the energy is absorbed by the body during the rest pass. The opposite side of the body is a plate containing a film that detects the X- rays and captures the attenuated x-rays. As an x-ray emerges from the body, it contains an image in the form of variation in exposure across the image area. Variations are a result of different rates of attenuation of the x-ray by the object. The plate is sprayed with powder that adheres to the charged areas hence electrostatic charge is formed. The heavily charged areas produce more detailed information as powder gathers more quickly in those areas.
X rays are more attenuated by denser material than light material; therefore bones will attenuate more rays than fats and muscles. From the above picture, the bones are clearly seen (denser material) while muscles, blood, and fats cannot distinctly be seen. Shadings show them.
The CT scanner uses x-rays that are emitted in a fan shape to produce 3D images of objects. It has a rotating gantry with an x-ray tube mounted on it and an arc-shaped detector. When the x-ray beam is aligned by the collimator and emitted, the rotating frame spins the tube and detector by 360 degrees on the target object. After every one complete rotation of the tube, the image of a thin film is acquired and recorded by the detector. The detector records approximately 1000 images after every rotation. Each image is then reconstructed by the computer into a 3dimensional image (Ladd, and Palmer, 2013).

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