Transcript Scanning the Human Body

Scanning the Human Body
EQ: What types of scans can we use to study the
human body and what do they tell us?
An MRI
Machine
I. Computerized Axial Tomography (CAT/CT)
• CT scanning adds many X-ray images with the aid of a
computer to generate cross-sectional views of a patient's
anatomy.
• CT scans are performed to analyze the internal structures
of various parts of the body to view traumatic injuries
• CAT Scans can be used to view injuries or abnormalities
in the brain to determine how to treat people
appropriately
I. Computerized Axial Tomography (CAT/CT)
II. Electroencephalogram (EEG)
• EEG’s use small flat metal disks (electrodes) attached to
the head to monitor the electrical impulses within the
brain
• Information is taken down in a series of wavy lines
• This test is often used to test for epilepsy or other brain
disorders that are caused by misfiring of neurons within
the brain
II. Electroencephalogram (EEG)
WTH!!! I
thought Mom
said I was
getting an
Egg!!!
III. Magnetic Resonance Imaging (MRI)
• Uses a magnetic field and radio waves to create detailed
images of the organs and tissues within your body.
• The magnetic field temporarily realigns hydrogen atoms
in your body. Radio waves cause these aligned atoms to
produce very faint signals, which are used to create crosssectional MRI images — like slices in a loaf of bread
• An fMRI (functional MRI) is used to detect activity (or
lack thereof) in various parts of the brain
• If a part of the brain is not functioning or not functioning
well, then a person could have some disorders
III. Magnetic Resonance Imaging (MRI)
IV. Positron Emission Tomography (PET)
• In a PET scan, radioactive dye is injected into the body
• This dye will collect in your organs including the brain
• The subject is placed into a tunnel-shaped scanning
machine that takes pictures of the radioactive dye in the
brain
• This creates a 3D image of the brain
• This scan is primarily used in psychology to find areas of
the brain that are placated due to Alzheimer's or other
ailments
IV. Positron Emission Tomography (PET)