Term
| What are the 5 kinds of interactions? |
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Definition
ClassicalScattering
Compton effect
PhotoElectric Effect
Pair production
Photodisintegration |
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Term
What are the two Kinds of interactions involved in diagnostic x-ray ranges?
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Definition
Compton effect
Photoelectric |
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Term
| What is the predominant interaction in diagnostic xrays? |
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Definition
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Term
| What level of energy is involved with classic scattering? |
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Definition
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Term
| Classical scattering is sometimes called what? |
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Definition
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Term
| In classic scattering, the incident xray interacts with what, causing what? |
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Definition
| the target atom, causing it to become excited. |
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Term
| When the x-ray interacts with the target atom to excite it in classic scattering, what then happens? |
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Definition
| The target atom releases this energy as a scattered x-ray |
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Term
| In classic scattering, _____ is the same, but the _______is different. |
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Definition
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Term
| Classic scatterings is ______________ in diagnostic radiology |
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Definition
of little importance...
bc it involves low energy x-rays which dont contribute to an xray image |
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Term
| Compton effect- moderate energy xrays throughout the diagnostic range can undergo an interaction with ..... |
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Definition
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Term
| Compton effect not only scatters the x-ray but... |
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Definition
| reduces the energy and ionizes the atom. |
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Term
| The x-ray of a compton effect continues in ......... with ....... |
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Definition
| a different direction with less energy |
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Term
| This is the predominant effect in radiation therapy |
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Definition
| compton effect (more of a forward direction scatter) |
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Term
| Compton scatter can occur with? |
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Definition
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Term
| How are the compton effect scatters important in radiography? |
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Definition
| it is important so that there are the least amount of Compton scatterings to reduce film fog. |
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Term
| Scattered x-rays provide _______on a radiograph. |
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Definition
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Term
| the higher the beam, ____________ Compton |
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Definition
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Term
| The scattered x-rays from compton interactions can create a serious _____________ in radiography |
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Definition
| radiation exposure hazard |
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Term
| Radiation from what is the source of most occupational radiation exposure |
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Definition
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Term
| With photoelectric effect, xrays in this diagnostic range interact with ... |
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Definition
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Term
| With photoelectric effect, the x-ray is not _____ and is totally ________ |
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Definition
not scattered
totally absorbed |
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Term
| Photoelectric effect: the electron is removed from the atom and escapes with ... |
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Definition
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Term
| photoelectric is effective/not effective? |
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Definition
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Term
| what are produced after a photoelectric interaction |
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Definition
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Term
| characteristic xrays are called __________ and behave in the same manner as scattered radiation- no value to the rad. image |
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Definition
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Term
| A photoelectric interaction cannot occur unless the incident xray has energy ... |
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Definition
| equal to or greater than the electron binding energy |
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Term
| Pair production occurs with energies greater than ... |
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Definition
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Term
| The incident xray comes close to what in pair production |
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Definition
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Term
| Pair production: the incident xray interaction causes the photon to disappear and be replaced by ? |
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Definition
| two electrons : positron and negatron |
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Term
| When very high energy x-rays can be absorbed by the nucleus |
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Definition
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Term
| This is when the nucleus becomes excited and emits a nucleon or nuclear fragment |
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Definition
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Term
| Photo-disintegration involves energies greater than |
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Definition
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Term
| The _________ results in no diagnostic information reaching the image |
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Definition
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Term
| The ______________ results in xrays that are completely absorbed. |
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Definition
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Term
the x-rays that pass through the body without interacting .....
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Definition
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Term
| An xray image results from the difference between ... |
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Definition
| those absorbed photoelectrically and those not absorbed at all |
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Term
| in rad therapy... predominant interaction is what? |
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Definition
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