| contrast | A dye injected intravenously during X-ray studies, for example CT, to enhance the image of a tumour. In MR studies, the contrast is called gadolinium. The use of contrast may rarely result in some adverse effects: it also increases the cost (but also accuracy in many cases) of the scan. (16 Dec 1997) |
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| contrast agent | A substance that is introduced into or around a structure and, because of the difference in absorption of X-rays by the contrast medium and the surrounding tissues, allows radiographic visualisation of the structure. (18 Nov 1997) |
| contrast bath | A bath in which a part is immersed in hot water for a period of a few minutes and then in cold, the hot and cold periods alternated regularly at intervals, usually half-hours; used to increase the blood flow to the part. (05 Mar 2000) |
| contrast echocardiography | The injection of contrast media of high echo reflectants (e.g., bubbles) to outline a chamber or delineate a shunt within the heart. (05 Mar 2000) |
| contrast enema | Enema using barium or another contrast medium. (05 Mar 2000) |
| contrast enhancement | The intravenous administration of water-soluble iodinated contrast material, which increases the CT number of the vascular pool, as well as some lesions (particularly in the brain), due to abnormal leakage into the interstitium; the property of showing increased radiopacity from concentration of contrast medium. (05 Mar 2000) |
| contrast material | A substance that is introduced into or around a structure and, because of the difference in absorption of X-rays by the contrast medium and the surrounding tissues, allows radiographic visualisation of the structure. (18 Nov 1997) |
| contrast media | <radiology> Side-effects from high osmolality / viscosity (fluid shifts from different compartments), vasodilatation, heat, pain, osmotic diuresis, haemodynamic changes, pharmacokinetics, distribute volume into extracellular space, clearance by glomerular filtration and renal excretion, physiologic reaction, increased plasma osmolality causes fluid shift from RBCs and pulmonary tissue leading to increased plasma volume, then osmolar gradient reverses with passage of contrast bolus to pulmonary capillary endothelium leaks protein into pulmonary interstitium leading to increased pulmonary oedema, transient cardiovascular changes (magnitude increased with tonicity of medium), increased PAP, increased CO with decreased peripheral/pulmonary vascular resistance, decreased systemic arterial pressure (variable), may activate gen receptors causing side effects (12 Dec 1998) |
| contrast medium | A substance that is introduced into or around a structure and, because of the difference in absorption of X-rays by the contrast medium and the surrounding tissues, allows radiographic visualisation of the structure. (18 Nov 1997) |
| contrast sensitivity | The ability to detect sharp boundaries (stimuli) and to detect slight changes in luminance at regions without distinct contours. Psychophysical measurements of this visual function are used to evaluate visual acuity and to detect eye disease. (12 Dec 1998) |
| contrast stain | <technique> A dye used to colour one portion of a tissue or cell which remained unaffected when the other part was stained by a dye of different colour. Synonym: differential stain. (05 Mar 2000) |
| contrast transfer function | <microscopy> A mathematical function that expresses the ability of an optical or electronic device to transfer signals faithfully as a function of the spatial or temporal frequency of the signal. The modulation transfer function is the ratio of percentage modulation of a sinusoidal signal leaving to that entering the device over the range of frequencies of interest. The modulation transfer function is usually presented as a graph of modulation transfer function versus log (frequency). For a square wave signal, the function is known as the CTF. Acronym: MTF (26 Mar 1998) |
| contrastimulant | 1. Annulling the effect of a stimulant. 2. An agent whose action opposes that of a stimulant. (05 Mar 2000) |
| contrasuppressor cells | A subpopulation of T-cells, distinct from T helper cells, which inhibit T suppressor cell function. (05 Mar 2000) |
| contrecoup | Denoting the manner of a contrafissura, as in the skull, at a point opposite that at which the blow was received. See: contrecoup injury of brain. Origin: Fr. Counter-blow (05 Mar 2000) |
| continuous amnesia |
loss of memory for all events after a certain time, continuing up to and including the present.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| continuous capillaries |
one of the two major types of capillaries, found in muscle, skin, lung, central nervous system, and other tissues, and characterized by an uninterrupted endothelium, a continuous basal lamina, fine filaments, and numerous pinocytotic vesicles. Cf. fenestrated c's.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| continuous epidural analgesia |
a method of pain relief consisting of continuous bathing of lumbar or thoracic nerve roots within the epidural space with an injected anesthetic solution; used during labor and childbirth, in general surgery for blockage of pain pathways below the umbilicus, and postoperatively. Called also continuous epidural anesthesia.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| continuous pacing |
continuous delivery of cardiac pacing stimuli, either at a normal or overdrive rate, to prevent tachycardias.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| contrast medium |
a substance that is introduced into or around a structure and, because of the difference in absorption of x-rays by the contrast medium and the surrounding tissues, allows radiographic visualization of the structure.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| cont | a contentious speech act |
|---|---|
| cont | having or showing a ready disposition to fight |
| cont | involving or likely to cause controversy |
| cont | inclined or showing an inclination to dispute or disagree, even to engage in law suits |
| cont | a disposition to fight |
| cont | happiness with one's situation in life |
| cont | a list of divisions (chapters or articles) and the pages on which they start |
| cont | of equal extent or scope or duration |
| cont | having a common boundary or edge |
| cont | connecting without a break |
| cont | a struggle between rivals |
| cont | an occasion on which a winner is selected from among two or more contestants |