Transcript Computed Tomography Scan (CT Scan)

Computed Tomography
Scan
(CT Scan)
Reid Coulombe
Brief Overview
 CT Scan is used for diagnostics
 Doctors can’t always make a diagnosis
 CT scan use radiation to take X-Rays (slices) of the
body
 CT scans take slices and turn into 3D images
History
 (early 1900’s) Alessandro Vallebona (Italy) had the idea
of taking slices of the body for imaging (Tomography)
 (1971) First CT Scan performed
 (1974) CT Scanners installed
 The inventors of the CT scan are credited as Godfrey
Hounsfield (Britain) and Allan Comrack (South Africa).
State of the Art
 Widely prevalent
 Over the past 20
years their use
has increased
greatly
 Unnecessary CT
Scans?
 3D imaging, and
better clarity
CT vs MRI
 CT Scans are usually cheaper
 CT Scans are typically better at showing bones than
MRI, but less effective at showing the soft tissue
 CT scans take around 5 minutes, MRI’s usually take 30
minutes
 CT scans can be harmful to the patient, while MRI’s
have no known biohazards
 Both used for for detecting cancer
Limitations
 In order for better clarity, more exposure to radiation is
necessary
 Human error in reading scans
 Not very good at depicting soft tissue
 In order to change the image plane you have to move
the patient, unlike with MRI.
Future of CT Scans
 Discovery
CT750
 Clearer
Imaging due
to Garnet
detector
material
 Less radiation
exposure
 Faster
Bibliography
 "CT Scan vs MRI." - Difference and Comparison. N.p., n.d. Web.
18 Sept. 2012. <http://www.diffen.com/difference/
CT_Scan_vs_MRI>.
 "X-ray Computed Tomography." Wikipedia.
Wikimedia
Foundation, 17 Sept. 2012. Web. 17 Sept. 2012.
<http://en.wikipedia.org/wiki/Xray_computed_tomography>.
 "Read What Your Physician Is Reading on
Medscape."
EMedicineHealth. N.p., n.d. Web. 17 Sept. 2012.
<http://www.emedicinehealth.com/ct_scan/
article_em.htm>.
 Healthcare News, GE. "World’s First High
Definition CT
Scanner Sets New CT Image Clarity Standard." GE, Apr.May 2009. Web