Indocyanine green (ICG) is a cyanine dye used in medical diagnostics. It is used for determining cardiac output, hepatic function, and liver blood flow, and for ophthalmic angiography. It has a peak spectral absorption at about 800 nm. These infrared frequencies penetrate retinal layers, allowing ICG angiography to image deeper patterns of circulation than fluorescein angiography.
Rate of interest R = I / PT, where I is the interest, P is the principal amount, T is the interest period, and R is the rate of interest. Rate of interest can be annual, half yearly, or quarterly according to the deal made.
For other uses, see Rate. In mathematics, a rate is the ratio between two related quantities. Often it is a rate of change. If the unit or quantity in respect of which something is changing is not specified, usually the rate is per unit of measurement. However, a rate of change can be specified per unit of time, or per unit of length or mass or another quantity. The most common type of rate is per unit of time, such as speed, heart rate and flux. Ratios that have a non-time denominator include exchange rates, literacy rates and electric field (in volts/meter).