Transcript CT Scans of the Heart

CT Scans of the Head
Tim Brown
What is a CT Scan?
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Computed Axial Tomography Scan
X-rays
Produces 3D image
2 types
▫ Spiral
▫ Electron Beam
Common Problems That Are Examined
• Head Injuries
▫ Concussions
• Tumors
• Strokes
• Other Brain Diseases
History
• In the early 1900’s Alessandro Vallebona
proposed the single-slice method.
• In 1967 Sir Hounsfield thought up the first entire
scanner.
• In 1971 the first commercial scanner was
brought into use.
• Nobel Prize
Current State
• Improvements in
▫ Speed
▫ Slice count
▫ Image quality
• Fixed/Portable
• Cone Beam CT Scans
Limitations
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Radiation
Clarity
Speed
Size
Future
• Concentrated Beams
▫ Less radiation
▫ Increased coverage
▫ Higher resolution
• Only scans the portion of the body needed
Works Cited
• "CT - Head." Head CT (Computed Tomography, CAT
Scan). N.p., 15 May 2012. Web. 01 Oct. 2012.
<http://www.radiologyinfo.org/en/info.cfm?pg=headct
>.
• "CT Scans." Wikipedia. Wikimedia Foundation, 26 Sept.
2012. Web. 01 Oct. 2012.
<http://en.wikipedia.org/wiki/CT_scans>.
• Hofer, Matthias. CT Teaching Manual: A Systematic
Approach to CT Reading. 3rd ed. New York, NY: Georg
Thieme Verlag, 2007. Print.
• Holmes, Erskine J. Interpretation of Emergency Head
CT. New York, NY: Cambridge UP, 2008. Google Books.
Web. 01 Oct. 2012.
<http://books.google.com/books?id=TYg6QRSnvw0C>.