Medical knowledge | Radiology » Diagnostic imaging

Diagnostic Imaging Principle of diagnostic imaging • To obtain visual information from tissues/organs, in most cases: • ENERGY TRANSMISSION to organism • Interaction • Retrieval of modified energy carrying signals • Signal processing Physics of diagnostic imaging Propagating energy: wave or radiation Electromagnetic waves – Radiography, fluoroscopy – CT – MRI – Endoscopy – Light microscopy – Telethermography – Scintigraphy, SPECT (γ-rays) Mechanical waves – (Ultra)sonography DIAGN. RADIOLOGY Corpuscular radiation – Electron microscopy (β-) – PET (β+) DIAGN. IN VIVO NUCLEAR MEDICINE Electromagnetic waves – Radiography, fluoroscopy – CT – MRI – Endoscopy – Light microscopy – Telethermography – Scintigraphy, SPECT (γ-rays) – Scintigraphy, SPECT (γ-rays) – CT, radiography, fluoroscopy (x-rays) – Light microscopy, endoscopy – Telethermography – MRI Physics diagnostic There are of therapeutic fields imaging

as well Propagating energy: wave or radiation Electromagnetic waves – Radiography, fluoroscopy – CT – MRI – Endoscopy – Light microscopy – Telethermography – Scintigraphy, SPECT (γ-rays) Mechanical waves – (Ultra)sonography DIAGN. RADIOLOGY Corpuscular radiation – Electron microscopy (β-) – PET (β+) DIAGN. IN VIVO NUCLEAR MEDICINE There are therapeutic fields as well • Interventional radiology • Radiotherapy Where is the source? Outer Inner source of radiation/waves X-ray, CT, US MRI, NM Interaction between radiation/wave & medium a) Reflection b) Change in direction (e.g refraction) c) d) (+  Absorption Scattering Divergation ATTENUATION) CONTRAST AGENTS • Better contrast  • More details  • Depiction of movement  E.g circulation kinetics Diagnostic imaging means consultation