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Unit4X-rayInteractions&Attenuation
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1. Energy
2. Thickness
3. Atomic Number
4. Density
Attenuated Radiation = ____ + ____
Attenuated Radiation = Absorbed + Scatter
1. Whole atoms
2. Orbital electrons
3. Nucleus
1. Incident photons
2. Target atom
Coherent Scattering
10 keV
Outer-shell
Backscatter
Ei
Incident photon energy
= Es
Scattered Compton photon energy
+ (Eb
Electron binding energy
+ Eke
Kinetic energy given to ejected recoil electron)
Photoelectric Absorption
inner-shell
Ei = Eb + Eke
Decreases
Increases
Decreases
KV
Decreases
1. Pair Production
2. Nuclear
3. Therapeutic
4. 1.02 MeV
5. Negatron
6. Positron
1. Photodisintegration
2. Nucleus
3. 10 MeV
1. Oxygen
2. Carbon
3. Hydrogen
4. Nitrogen
5. Calcium
6. Phosphorus
1. Air
2. Fat
3. Muscle
4. Bone
1. Subject Density
2. Subject Contrast
3. Subject Detail
4. Subject Distortion
Pleural Effusion (additive condition)
Cardiomegaly (additive condition)
Congestive Heart Failure (additive condition)
Pneumonia. (additive condition)
Pulmonary Edema. (additive condition)
Pneumonectomy. (additive condition)
Cirrhosis (enlarged liver). (additive condition)
Paget’s Disease (additive condition)
Osteochondroma (additive condition)
Pneumothorax. (Destructive condition)
Bowel Obstruction. (Destructive condition)
Pneumoperitoneum. (Destructive condition)
Osteoporosis. (Destructive condition)
Carcinoma (giant cell). (Destructive condition)
Multiple Myeloma. (Destructive condition)
Osteolytic Metastasis (from renal carcinoma). (Destructive condition)
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Author
Marc817
ID
348665
Card Set
Unit4X-rayInteractions&Attenuation
Description
Unit 4 X-ray Interactions & Attenuation
Updated
2019-09-21T20:36:07Z
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