Recent events in my life have forced me to clarify a few words/terms and I thought I would pass them on. Enjoy and have a nice weekend–
- CT (Computed Tomography) Scan–A special radiographic technique that uses a computer to assimilate multiple X-ray images into a 2 dimentional cross-sectional image. This can reveal many soft tissue structures not shown by conventional radiography. Scans may also be dynamic in which a movement of a dye (often called contrast) is tracked. Cuts may be 5 or 10 mm apart or, in some instances even further apart. A special dye material may be injected into the patients vein prior to the scan to help differentiate abnormal tissue and vasculature. The machine rotates 180 degrees around the patients body, sending out a pencil-thin X-ray beam at 160 different points. Crystals positioned at the opposite points of the beam pick up and record the absorption rates of the varying thicknesses of tissue and bone. This data is then relayed to a computer that turns the information into a picture on a screen. Using the same dosage of radiation as that of the conventional X-ray machine, an entire slice of the body is made visible with about 100 times more clarity.
The scanner was invented in 1972 by the British electronics engineer Godfrey N. Hounsfield and was in general use by 1979.
- EKG (Electrocardiogram)–A recording of the electrical activity of the heart on a moving strip of paper. The electrocardiogram detects and records the electrical potential of the heart during contraction.
- Ultrasound–This is a type of imaging technique which uses high-frequency sound waves.
This is highly operator-dependent and is thought to be useful in diagnosis but not particularly accurate in the assessment of tumor response. For the latter, CT or MR imaging are more accurate.
- Stress Test–Any cardiac challenge, physical, pharmacological, or mental delivered under monitored conditions. Most commonly this is exercise, the most common monitor being electrocardiography although any other graphic technique, including cardiac catheterization, may be applicable.
- Blood Clot–The conversion of blood from a liquid form to solid through the process of coagulation. A thrombus is a clot which forms inside of a blood vessel. If that clot moves inside the vessel it is referred to as an embolus (embolism). The presence of atherosclerotic plaque lining blood vessel walls is a significant stimulus for clot formation.
- MS (Multiple Sclerosis)–It is a disease which results in destruction of nerve sheaths resulting in scarring (fibrosis). Commonly presents with its first attack between the ages of 20 and 40. Common symptoms include double vision, extremity weakness, numbness, bladder dysfunction and movement or coordination problems.
- Anxiety Attack–An acute episode which involves the unpleasant emotional state consisting of psychophysiological responses to anticipation of unreal or imagined danger, ostensibly resulting from unrecognized intrapsychic conflict. Physiological concomitants include increased heart rate, altered respiration rate, sweating, trembling, weakness and fatigue, psychological concomitants include feelings of impending danger, powerlessness, apprehension and tension.
courtesy of Medic8 Medical Dictionary