Transcript CT Scans of the Head

CT SCANS OF
THE HEAD
BY CHRISTIAN CHIPOURAS
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 Xray images to create the 3dimentional image.
• The image can be viewed in
cross sections
• Creates a clear image with
many angles of viewing
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 xrays 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.
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
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
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
FUTURE DIRECTION
• Cheaper scanning and scanners
• Less radiation used per scan
• Smaller scanners
• Better resolution
• The use of non-toxic dyes
• Faster scanning
BIBLIOGRAPHY
•
"X-ray Computed Tomography." Wikipedia. Wikimedia Foundation, 20 Nov.
2012. Web. 18 Nov. 2012. http://en.wikipedia.org/wiki/Xray_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>.