In the last two protocols, automated ADC (apparent diffusion coefficient maps) were available. The ADC values from the normal or diseased brain parenchyma were calculated directly from these automatically generated ADC maps with region of interest (ROI) and/or âpixel lensâ evaluation.
A carat is a unit of measure for diamond weight and is evaluated on a point system. One carat is equivalent to 100 points. A karat is the standard measurement of gold, which is divided into 24 parts. Pure gold is 24 karats, meaning 24 out of 24 parts are gold.
Since an ounce is 28.3 grams, a diamond has to weigh 141.5 carats to equal an ounce or 2264 carats to equal a pound. The term karat refers to a ratio and is used in describing the fineness of gold. Ten karat gold is 10/24ths (41%) pure gold. Fourteen karat gold is 14/24ths (58%).