time (redirected from time gain compensation (TGC))

time (tīm) a measure of duration. Symbol t.

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activated partial thromboplastin time  (APTT) (aPTT) (PTT) the period required for clot formation in recalcified blood plasma after contact activation and the addition of platelet substitutes; used to address the intrinsic and common pathways of coagulation.

bleeding time  the duration of bleeding after controlled, standardized puncture of the earlobe or forearm; a relatively inconsistent measure of capillary and platelet function.

circulation time  the time required for blood to flow between two given points.

clotting time , coagulation time the time required for blood to clot in a glass tube.

inertia time  the time required to overcome the inertia of a muscle after reception of a stimulus from a nerve.

one-stage prothrombin time  prothrombin t.

prothrombin time  (PT) the rate at which prothrombin is converted to thrombin in citrated blood with added calcium; used to assess the extrinsic coagulation system of the blood.

reaction time  the time elapsing between the application of a stimulus and the resulting reaction.

stimulus-response time  reaction t.

thrombin time  (TT) the time required for plasma fibrinogen to form thrombin, measured as the time for clot formation after exogenous thrombin is added to citrated plasma.

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time (tm)

n.

1. A duration or relation of events expressed in terms of past, present, and future, and measured in units such as minutes, hours, days, months, or years.

2. A certain period during which something is done.

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time (t)

Etymology: AS, tima

1 a measure of duration.

2 an interval separating two points in a continuum between the past and future.

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time [tīm]

a measure of duration. See under adjectives for specific times, such as bleeding time.

activated partial thromboplastin time (APTT, aPTT) the period required for clot formation in recalcified blood plasma after contact activation and the addition of platelet substitutes such as brain cephalins or similar phospholipids; used to assess the coagulation pathways. A prolonged aPTT can indicate a deficiency of any of various coagulation factors, including factors XII, XI, IX, VIII, X, V, and II, and fibrinogen.

AEC minimal response time the shortest duration at which x-ray exposure can be terminated by automatic exposure control.

atrioventricular sequential time a fixed nonprogrammable interval that extends from the atrial stimulus to the ventricular stimulus.

bleeding time the time required for a standardized wound to stop bleeding; used as a test for platelet disorders; see also bleeding time.

circulation time the time required for blood to flow between two given points; see also circulation time.

clotting time (coagulation time) the time required for blood to clot in a glass tube; see also clotting.

cold ischemia time the time between the placement of a traumatically amputated body part in ice and the time of surgical replantation.

inertia time the time required to overcome the inertia of a muscle after reception of a stimulus.

ischemia time the total time between traumatic amputation of a limb or portion of a limb and its surgical reimplantation; it is the sum of warm and cold ischemia times.

minimal response time in radiology, the shortest possible exposure time for an x-ray film to be exposed automatically.

one-stage prothrombin time prothrombin time.

prothrombin time see prothrombin time.

real time a term used to describe a recording device that shows events simultaneously to their occurrence.

R peak time intrinsicoid deflection.

thrombin time the time required for plasma fibrinogen to form thrombin; see also thrombin time.

warm ischemia time the time interval between traumatic amputation of a limb or part and its placement on ice.

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time,

n a measure of duration.

time, clot retraction,

n the time required for a given quantity of blood to separate in the tube in which it has been placed. For 3 ml of blood at room temperature, 1 hour is normal. It is very slow in thrombocytopenia.

time, coagulation,

n the time required for blood clotting to begin in a capillary tube, normally 2 to 8 minutes. A coagulation time three times normal is a definite danger sign.

time, gel,

n (gelation time), the interval of time required for a colloidal solution to become a solid or semisolid jelly or gel. Usually refers to the working time of a hydrocolloid or alginate impression material.

time, gelation,

n See time, gel.

time limits,

n.pl the periods within which a notice of claim must be filed.

time, median lethal,

n (LD₅₀ time, MLT), the time required for 50% of a large group of animals or organisms to die after administration of a specified dose of radiation.

time, prothrombin

n (one-stage test), a gross but useful screening test of the completeness of the second and third stages of blood coagulation. Normal prothrombin time by the Quick method is 12 to 15 seconds. The time is affected by deficiencies of factor V or VII as well as of prothrombin. See also test, prothrombin consumption.

time, serum prothrombin,

n See test, prothrombin consumption.

time, setting,

n the length of time for a mixed preparation of materials to reach a state of hardness, measured from the start of the mixing. The end point for dental materials is usually determined by a penetration test.

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time

a measure of duration. See under adjectives for specific times, e.g. bleeding time.

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time chart

a graph on which the values of a variable are plotted on one axis and time on the other.

time cluster

a cluster of cases at particular points along a time axis.

developing time

for an x-ray film is about 3 to 5 minutes, but automatic processors complete the task in 90 seconds.

time gain compensation (TGC)

in ultrasonography, electronic amplification of returning sound waves, which are weaker because they come through deeper structures, is necessary so there is an even image density through the field. This is usually represented graphically by a TGC curve on most machines.

time graph

see time chart (above).

time horizon

the period until which the economic analysis under consideration applies.

time series

a distribution of data according to occurrence.

time-space series

a distribution of data according to the time and the place of occurrence.

time value

said of money; money now is more valuable than money later.

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time

Vox populi The so-called fourth dimension, which corresponds to the duration of a particular event. See Activated partial thromboplastin time, Collision time, Contact time, Delay time, Doubling time, Dwell time, Emergence time, Euglobulin clot lysis time, Expiratory time, Forced expiratory time, Gastric emptying time, Interpulse time, Ivy bleeding time, Just in time, Lead time, Lethal time, Mean time between failure, Movement time, Overtime, Partial thromboplastin time, Pit recovery time, Plasma recalcification time, Quality time, Relaxation time, Prothrombin time, Real time, Relaxation time, Reptilase time, Retention time, Stypven time, Therapeutic turnaround time, Total lead time, Total sleep time, Transportation time, Tumor doubling time, Turnaround time, Turnover time, Wake time, Zero time.

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Patient discussion about time.

Q. How does the time of high and low usually divide in bipolar? How long are the high times supposed to last and should the low times last more or less the same? how much time is there usually in between?

A. Some people rapid cycle (which means that the person can cycle through both moods up to multiple times a day) others experience long cycles lasting days, weeks, months and at times years. Like Joseph said there are no rules! Is your friend cycling? I hope he is doing okay!

Q. If we can get sick all the time- why not take antibiotics all the time and prevent it? I can take antibiotics to my child and prevent his from getting all sort of diseases. And if so- what should I give him?

A. the problem with abuising antibiotics is that, bacteries build resistance to them, and then when you really need them they wont work.

Q. Lot’s of time at home, too close to the fridge - any tips? I’m starting my 6 months-preparation period for my finals next month, which mean I’ll spend practically all day at home, in a dangerous vicinity to the fridge. I already lost 25 pounds that I rather not gain again. Does any one have any tips how to avoid the dangers of being at home so much? ?

A. You can make yourself a menu of what you will eat for the day (or you can go by the week). Once you have this you should be ok because you will already know what you are going to eat for the day. If you stick to it you shouldn't have any problems. Good luck on your finals. Hope this helps.