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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)