Diagnostic Imaging

Radiography

Ionizing radiation is used to produce radiographs

Computed Tomography (CT)/Computed Axial Tomography (CAT)

Takes a series of cross-sectional x-ray films in full circle rotation; computer converts rates of absorption and density of x-rays into 3D picture on screen

Magnetic Resonance Imaging (MRI)

Large magnet surrounds the patient as scanner subjects the body to a radio signal that temporarily alters the alignment of the hydrogen atoms in the patient’s tissue, when radio signal is turned off, atoms realign and the energy produced is absorbed by detectors

Radionuclide Organ Imaging

Uses injected or ingested radioactive isotope that emits gamma radiation; useful in determining size, shape, location and function of organs

Positron Emission Tomography (PET)

Radioactive isotope taken up by brain tissue, as radioisotope decays, positrons emitted are detected by scanner and images are taken during control and then after a task or intervention

Sonography (Ultrasound)

High frequency sound waves visualize tissues, sound waves reflected off structures and can produce moving images