ChristianC_2.ppt
- 1. CT SCANS OF THE HEAD BY CHRISTIAN CHIPOURAS
- 2. WHAT IS A CT SCAN • A CT scan is also known as a computed tomography • A CT scanner uses X-rays to create a 3-dimentional image of an object. • It uses many 2 dimensional X- ray images to create the 3- dimentional image. • The image can be viewed in cross sections • Creates a clear image with many angles of viewing
- 3. BREIF HISTORY • Early 1900s- Alessandro Vallebona proposed a method of projecting a single slice of a body part onto a film. • In 1959 William Olendorf thought of scanning a head through a beam of X-rays. • In 1961 Olendorf built a machine that successfully used x- rays to create a 3D image. • The first patient was tested in 1971 and the scanner took 160 readings around 180 degrees. • In 1974 CT scanners were installed in hospitals. • Over the next 25 years faster, newer, and more efficient scanners were manufactured.
- 4. CT SCANNING OF THE HEAD TODAY • Today CT scans are used to detect aneurysms, blood clots, skull injuries, strokes, brain tumors, and diseases. • An iodine dye is given for the patient to take before undergoing the scan so that the images can be viewed more clearly. • The scan creates images of cross sections of the brain and skull. • The complete scan takes around 5 minutes. • CT scans of the head the leading procedure in diagnosing problems in the head, as it creates very clear images of bones such as the skull and spine. • Today 6000+ scanners are in use in the US
- 5. WHAT IS BEING SOLVED • A CT scanner allows us to view the interior of the head without an incision They give us clear information • Allow the clear imaging of tumors • Helps diagnose brain cancer and head problems • CT scans can also be used to reconstruct the faces of unidentified victims
- 6. LIMITATIONS • Not as visible as MRI Scans • Costly • Some patients may not be able to fit in the Scanner • Weight limit (around 450lbs) • Not recommended for repeated use • 2 scans a year • Cannot be performed on a pregnant woman • Images of soft tissue are not as vivid as a MRI image
- 7. FUTURE DIRECTION • Cheaper scanning and scanners • Less radiation used per scan • Smaller scanners • Better resolution • The use of non-toxic dyes • Faster scanning
- 8. BIBLIOGRAPHY • "X-ray Computed Tomography." Wikipedia. Wikimedia Foundation, 20 Nov. 2012. Web. 18 Nov. 2012. http://en.wikipedia.org/wiki/X- ray_computed_tomography. • Radiology Society of North America. "Computed Tomography (CT) - Head." Computed Tomography (CT)- Head. Radiologyinfo.org. Web. 18 Nov. 2012. <www.radiologyinfo.org/en/pdf/headct.pdf>. • "Cranial CT Scan: MedlinePlus Medical Encyclopedia." U.S National Library of Medicine. U.S. National Library of Medicine. Web. 18 Nov. 2012. <http://www.nlm.nih.gov/medlineplus/ency/article/003786.htm>. • "What Is CT Scanning of the Head?" CT Head Scan, Brain CT Scan, Clinic. Web. 18 Nov. 2012. <http://www.scandirectory.com/content/ct_head_scan.asp>. • Computed Tomography Its History and Technology. Siemens Medical. Seimens Medical. Web. 18 Nov. 2012. <www.medical.siemens.com/...ct.../CT_History_and_Technology.pdf>. • Advantagesof CT In3DScanning of Industrial Parts. 3d Scanning Technologies. 3d Scanning Technologies Magazine. Web. 18 Nov. 2012. <www.4nsi.com/assets/files/3dscan-nsi.pdf>.