Greatest scatter dose obtained from a horizontal beam exposure at 135° from the incident beam was still far below background radiation. ResultsĪt 125 cm and 93 cm there was minimal scatter compared to daily natural background radiation dose (8.493 μGy). Four measurements were taken at each point and averaged. Exposures were obtained at 160 mAs and the results were extrapolated to correspond to 2.5 mAs. For horizontal exposures, the dosimeter was placed directly behind a CR plate and scatter dose at 90-degrees and 135-degrees from the incident beam was also measured. This corresponds to 2 and 3 ft between standard isolettes, respectively. Materials and methodsĭose secondary to scattered radiation from an acrylic phantom exposed to vertical and horizontal beam exposures at 56 kVp was measured at 93 cm and 125 cm from the center of the phantom. For example, during x-ray mammography, very small amounts of radiation may be scattered to areas away from the breast, such as the head and neck, sternum, and thyroid gland.To evaluate the dose of scatter radiation to infants in a NICU in order to determine the minimal safe distance between isolettes.

Radiation that spreads out in different directions from a radiation beam when the beam interacts with a substance, such as body tissue. This fog produces an overall increase in radiographic density. It does not strike the IR in a pattern that represents the subject, and it contributes nothing of value to the image. Radiographic Effect of Scatter Radiation Fog is unwanted exposure to the image. How does scatter radiation can be controlled?Ĭontrol of side scatter can be achieved by moving objects in the room away from the detector, moving the x-ray tube to the center of the vault, or placing a collimator at the exit port, thus reducing the diverging radiation surrounding the central beam. How can scatter radiation be controlled?Ĭontrol of side scatter can be achieved by moving objects in the room away from the detector, moving the x-ray tube to the center of the vault, or placing a collimator at the exit port, thus reducing the diverging radiation surrounding the central beam. In other words, if the x-ray unit is above the patient, the highest scatter radiation at a set distance from the patient will be out to the side of the patient. The maximum scatter radiation occurs perpendicular to the x-ray beam. Scatter radiation is generated in the patient when an x-ray beam strikes the patient. (iii)Finally, it allows direct spatial definition with high-contrast resolution. (ii)It has also greater sensitivity to low-density materials such as gases. (i) It permits to place both the radiation source and the detector on the same side of the object. In nondestructive testing, it offers three advantages. What are the benefits of scattered radiation? Large air gaps may give rise to geometrical un-sharpness, which must be kept minimal for high-resolution detectors. To reduce the scattered radiation, possible methods are smaller fields-of-view (FOV), larger air gap between object and detector, and the use of an anti-scatter grid. What is scattered radiation How is it reduced? What is Scatter Radiation? As defined by the National Cancer Institute, scatter radiation is secondary radiation that spreads in different directions from a beam when that beam interacts with any substance, such as body tissue, a wall, or a table. Scatter radiation is a type of secondary radiation that occurs when the beam intercepts an object, causing the X-rays to be scattered. (SKA-ter RAY-dee-AY-shun) Radiation that spreads out in different directions from a radiation beam when the beam interacts with a substance, such as body tissue.