Magnetic resonance imaging is a diagnostic system using a strong magnetic field and electromagnetic radio waves. An MRI displays images of the body in "slices" similar to that of a CT scan, but it reflects greater contrast between different types of body tissues.
CT scan is an advanced system producing cross-sectional images of the body much like the slicing of a loaf of bread. It is a highly sensitive method to accurately view the internal anatomy and detect extremely small lesions.
Ultrasound utilizes sound waves rather than x-rays to produce a medical image or picture of various organs and tissues. As the ultrasound waves penetrate the body, they are reflected back to the transducer by the internal organs.
Positron Emission Tomography is a non invasive, diagnostic imaging technique. It is useful clinically in patients with certain conditions affecting the brain and the heart as well as in patients with certain types of cancer.
X-ray imaging is perhaps the most commonly known form of diagnostic testing. Similar to visible light, x-rays use electromagnetic radiation, which contain wave-like forms of energy.