Transcript Anatomy and Medical Technology

Anatomy and Technology
 M.R.I
 P.E.T. Scan
 CT Scan
*Underlined Points is material
you'll need to discuss on Test.
Anatomy Standards: NSTA – Science and Technology
P.E.T. Scan – Positron Emission
Tomography
-Use Radioisotopes* to detect cellular
function of tissues.
Commonly used is “Tagged” glucose I.V ...levels
of glucose use (health) in study tissue can
be detected by amount of radiation emitted.
-Soft Tissue Targets – Brain, Liver, heart, Tumors
Radioisotopes: radioactively decaying elements
*Radioisotope- unstable element that emits radiation as it decays.
Ex. “Iodine-131” used in thyroid function scans.
Brain activity during depression (left) or normal brain
activity (right). Decreased areas of bright white/yellow
shows decreased brain activity due to depression.
http://www.riversideonline.com/health_reference/Articles/CA00052.cfm
http://www.mayoclinic.com/health/medical/IM00357
P.E.T. Scan – Positron Emission
Tomography
Tumor fluoresces
much more than
surrounding tissue.
Fast growing
cancer cells use
more “tagged”
glucose than other
tissue.
http://www.aboutcancer.com/pet_scan.htm
MRI- Magnetic Resonance Imaging
-No radiation – Computers analyze body
structure with use of a Magnetic field
-Most detailed
FYI...Magnetic Field induces alignment of poles in molecules
of tissues; Differing tissues will have different strength and
rate of return to original state....allowing great contrast of all
tissue types.
MRI - Magnetic Resonance
Imaging
http://en.wikipedia.org/wiki/Magnetic_resonance_imaging
http://www.photosfan.com/mri
/
http://www.ct-scan-info.com/head-
CT Scan (or CAT Scan)
http://www.radiologyinfo.org/en/photocat/gallery3.cfm
?pid=1&image=philip25.jpg&pg=bodyct
...aka...CT – Computer Tomography
X-rays combined w/computers
(computer enhances image...better than plain
x-ray film and can see tissue/organs
Inexpensive
Quickly Scan...minutes
Good in emergency situations!
Radioactive dye(“contrast”) can be used..see blood
vessels....
When may this be useful? What
emergency occurrence?
CT Scan (Computer Tomography)
http://www.ct-scan-info.com/headct.html
http://hybridmedical.com/default.aspx