what are the three factors that contribute to increases scatter radiation?
238909
Three primary factors influence the relative intensity of scatter radiation that reaches the image receptor: kVp, field size, and patient thickness. As x-ray energy is increased, the absolute number of Compton interactions decreases, but the number of photoelectric interactions decreases much more rapidly.
298501
['Sunburn. Use sunscreen or a hat for prevention. ... ', 'Change in temperature. Protect your ears with a cap or ear muffs. ... ', 'Ear infection. An ear infection may subside on its own after a few days. ... ', 'Red ear syndrome.']
778908
['Exponential Attenuation.', 'Inverse-Square Law.', 'X-ray Beam Quality.']
413269
['Radio.', 'Microwaves.', 'Infrared.', 'Visible light.', 'Ultraviolet.', 'X-rays (but they are waves)', 'Gamma rays.']
717453
Ionizing radiation takes a few forms: Alpha, beta, and neutron particles, and gamma and X-rays. All types are caused by unstable atoms, which have either an excess of energy or mass (or both).
666142
Particularly in larger body parts, such as obese adult torsos, lower energy photons are absorbed completely without contributing to image formation. In such situations, higher kVp is employed to improve the x-ray intensity reaching the receptor, thus increasing the signal to noise ratio on the images.
117750
['A, the Absorption Coefficient,', 'C, the concentration of the absorbing species,', 'L, the pathlength through which the ray of light passes from source to detector.']
1020605
Radiation. Radiation of certain wavelengths, called ionizing radiation, has enough energy to damage DNA and cause cancer. Ionizing radiation includes radon, x-rays, gamma rays, and other forms of high-energy radiation.
1338849
Absorption is the other main mechanism at work when electromagnetic radiation interacts with the atmosphere. In contrast to scattering, this phenomenon causes molecules in the atmosphere to absorb energy at various wavelengths.
1297259
In most temperate environments the major limiting factors for forest production are water and nutrients. Both factors greatly influence the amount of foliage produced and consequently directly affect the amount of radiation intercepted, hence also production.
824711
Non-radiative 'near-field' behaviors dominate close to the antenna or scattering object, while electromagnetic radiation 'far-field' behaviors dominate at greater distances.
1025568
['Increased depth means a lower frequency is required for optimal imaging. As a consequence there is a lower resolution. ... ', 'Anisotropy. Simply this means a structure is highly reflective to ultrasound. ... ', 'Bone blocks US waves. ... ', 'Artefacts are common. ... ', 'Training.']
47145
['wind speed and direction.', 'temperature.', 'humidity.', 'rainfall.', 'solar radiation.']
509136
Reducing the size of the scattered radiation source by collimation is an effective way of improving contrast. An air gap, or introducing a space between the patient's body and the receptor, reduces the intensity of the scatter in relation to the primary beam and improves contrast. It works because of the geometry.
1012305
The energy associated with EM radiation is proportional to frequency and inversely proportional to wavelength. Thus, EM waves with shorter wavelengths have more energy.
689350
Radiation is the transfer of energy by electromagnetic radiation. Heat can be transferred from one place to another by three methods: conduction in solids, convection of fluids (liquids or gases), and radiation through anything that will allow radiation to pass.
944503
['biological or internal factors, such as age, gender, inherited genetic defects and skin type.', 'environmental exposure, for instance to radon and UV radiation, and fine particulate matter.', 'occupational risk factors, including carcinogens such as many chemicals, radioactive materials and asbestos.', 'lifestyle-related factors.']