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Filtration is the process of increasing the mean energy of the x-ray beam by passing it through an absorber. The primary x-ray beam is polychromatic, that is, the beam contains a spectrum of photons of different energies and the average energy is one-half to one-third of the peak energy. Many of the photons produced are low energy and, if they escape through the glass window of the tube, they are absorbed by the first few centimeters of tissue and contribute nothing to the exposure of the film. Only the higher energy photons can penetrate the patient and reach the film to assist in making the radiograph The dose of radiation received by the patient is highest in the first few centimeters of tissue because of absorption of this low energy portion of the x-ray beam. The amount of scattered radiation is higher with an unfiltered beam because of the number of low energy photons. So, it is advantageous to both the patient and to the technician to use a filtered x-ray beam.
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Why does an X-ray beam need to be narrow?
X-ray technicians use colimators to narrow the x-ray beam to: - lower the dose the patient gets - lower the effect of scattered radiation
Is the x-ray beam used in CT scanning attenuated by the patient's tissues?
yes
What position is when the patient is positioned prone and the x-ray beam comes into the patient from the right side and exits to the left?
Ventral decubitus position.
What position is when the patient is positioned prone and the X-ray beam comes into the patient from the right side and exits to the left.?
Ventral decubitus position.
What the different between x-ray view and projection?
view is from the beam while projaction is image from patient
What is a thin fan-shaped x ray beam that rotates around the patient?
CAT scan, or CT image
How are patients from x rays?
A patient getting an x ray may wear special aprons to protect parts of the body that do not need X-ray exposure.
In geometry is laser beam a line or a ray?
A ray
Does a beam from a flashlight have a ray or point or angle?
A ray.
A thin beam of light is?
A ray is a narrow beam of light.
What is the momentum of an x-ray beam that has a wavelength of 5.0E-9m?
The momentum of an X-ray beam does not change based on a wavelength of 5.0E-9m. The momentum of an x-ray beam is the same as the speed or momentum of light.
What is the difference between a ray of light and a beam of light?
A light beam or beam of light is a narrow cone of light energy radiating from a small source. In optics, a ray is an idealized narrow beam of light.
