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Image analysis chapter 9 Image analysis chapter 9
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True or false Bremsstrahlung is one of the five basic extra interactions with matter - False True or false 5KEV would most likely undergo classical scattering - TrueNN True or false Compton scattering interactions contribute to image noise - True True or false in a Compton interaction and Adam is excited - False and Adam is ionized During the Compton of fact most of the incident x-ray energy is given to scattered x-ray true or false - True After Compton scattering the scattered x-ray has - Longer wavelength Compton interaction effects the image by increasing what - Noise or fog The probability that an x-ray will interact with and outershell electron is influenced principally by - The energy of the incident x-ray The Compton affect is - Independent of Z The Compton affect is - The principal source of image noise or fog The probability that an x-ray will undergo Compton interaction - Decreases with increasing x-ray energy The constant interaction involves so-called unbound electrons because - They have a very low binding energy Which of the following is the extra interaction that does not cause ionization - Classical scattering Compton scattered x-rays - Have lower energy then the incident x-ray The photoElectric effect is principally associated with what - Absorption of an x-ray
Air, bone, fat, long, muscle. Which of the following has the lowest effective atomic number - Fat Photoelectric interaction with soft tissue is most likely with which of the following x-rays - 0.3 K EV During photoelectric interaction - An electron is emitted from the Adam The radiographic image is formed principally by what - Photo electric interactions The probability of photoelectric effect varies as what function of x-ray energy - E to the - As a result of photoelectric interaction - An electron leaves the Adam The photo electric effect is - The complete absorption of an x-ray with the subsequent emission of an electron Lead has a Kaechele electron binding energy of 80 8KEV therefore - And 80 4KV x-ray can undergo photo electric interaction with the L shell electron 830 9KEV extra interaction through photoelectric effect with a K shell electron of barium that has a binding energy of 37KEv - The photoelectron will have 2KEV energy The probability of photoelectric effect varies as what function of target atomic number - Z to the third power Atomic structure is that readily transmit x-rays are called - Radio Lucent Differential absorption, although a complicated process, is basically the result of differences between - Photo electric affect and transmission When a radiograph it's taken - Locate VP is necessary when soft tissue is imaged because it leads to high photo electric effect At what approximate x-ray energy is the probability of a photo electric interaction and soft tissue equal to the probability of a Compton interaction - 20 KEV Which of the following has the greatest mass density blood bone that long muscle - Bone
Reduce patient does Increasing KV P in x-ray imaging will - Reduce skin dose In high KV P chest radiography, contrast depends most upon - Mass density Microcalcifications our image on mammograms principally because of - Atomic number More contrast is present from a barium examination then from an iodine examination because - Barium has a higher concentration Photo electric affect is proportional to - Z^ What will increase the energy of bremsstrahlung radiation - X-ray tube voltage What is the ideal KV P for a given K edge - Slightly higher than the K edge Compton interaction occurs with outershell electrons and results in - Reduced grayscale It's 60 KEV and soft tissue, what predominates - Compton scattering Compton interaction effects the image by increasing which of the following - Noise Differential absorption in which of the following tissue is most dependent on differences in mass density. A fat And bone B lung and bone C lung and fat D muscle and bone - B. Lung and bone Fat has a higher concentration of hydrogen and soft tissue, therefore which of the following is higher in fat than soft tissue - Electron density