Review of Radiologic PhysicsChapters incl. Board-type questions w/explanatory answers/ incl. MRI/ultrasound/mammography/radiography & fluoroscopy. |
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absorbed activity anode approximately artifacts atomic attenuation average breast called camera characteristic charge collimator contrast converted crystal decay decreases density depends detected detectors determined differences distance dose echo effect electrons emitted energy exposure factor Figure film filtration fluoroscopy focal spot frequency gamma gradient grid half-life heat higher improve incident increases intensity ionization light limit magnetic field mammography mass Match material maximum mean measured neutrons noise normally nuclear medicine nucleus obtained occurs organ output pair particles patient performed phosphor photon energy photons produced pulse radiation radiographic radiology range ratio rays reduce resolution result risk scan scatter screen screen/film signal skin spatial resolution Table thickness tion tissue transducer True typical ultrasound unit values voltage x-ray beam x-ray tube