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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Marc817

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Unit4X-rayInteractions&Attenuation

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Unit 4 X-ray Interactions & Attenuation

Updated

2019-09-21T20:36:07Z