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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.
What else can I help you with?
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
What term is used to describe the path of the central ray?
The path of the central ray in radiography is often referred to as the beam angulation. It describes the direction in which the x-ray beam is targeted towards the patient's anatomy.
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
The lead diaphragm determines the size and shape of the?
X-ray beam. The lead diaphragm is responsible for collimating the X-ray beam to ensure only the desired area is exposed to radiation, reducing unnecessary radiation exposure to the patient and improving image quality.
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.
What is primary radiation?
Primary radiation refers to the initial x-ray beam that is emitted from the x-ray tube and travels through a patient's body to create an image. It is the main source of x-ray photons used in medical imaging.
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.
