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Radiology 101
- 1. Rapid Introduction to Radiology MOHAMMEDEZUDDIN M.D. PGY-5 CHIEF RESIDENT JACKSON MEMORIAL HOSPITAL UNIVERSITY OF MIAMI DEPARTMENT OF RADIOLOGY
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- 5. Types of Radiation Ionizing Radiation X ray photons Gamma rays Particulate Radiation α β
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- 7. Physical Concepts Contrast ResolutionSpatial Resolution
- 8. Modalities X ray Computed Tomography Ultrasound Magnetic Resonance Imaging Nuclear Medicine
- 9. X ray Pros Quick Cheap Superior Spatial Resolution Cons Easy to miss subtle findings Limited evaluation of three dimensional structures
- 10. Computed Tomography Pros Threedimensional information Better contrast resolution over x ray Multiphase imaging greatly increases specialized utility Isotropic reconstruction Cons Costly Slower than plain radiograph Contrast allergies Complexity of ordering Large dose of ionizing radiation
- 11. Ultrasound Pros Vascular information/movingfluid Fast Cheap Does not use ionizing radiation Sensitive for fluid (collection, hematoma) Cons Limited depth Limited utility
- 12. Magnetic Resonance Imaging Pros Superior contrast resolution Staging purposes No ionizing radiation Cons Poor spatial resolution Slow Costly Limited utility in the emergent setting Physical Restrictions Artifacts Patient tolerance
- 13. Nuclear Medicine Pros FunctionalImaging PET/CT is the workhorse for staging in many neoplastic protocols Often provides an adjunct or alternative to conventional imaging modalities Uses include VQ scan Brain death study GI bleeding scan Cons Highest radiation dose Poor spatial resolution Costly Slow Not always available
- 14. Where to findhelp...
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- 20. Superior Vena CavaSyndrome
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