A companyâs inventory turnover ratio refers to how quickly goods enter and leave storage at the business. Itâs most often used in relation to companies that deal in perishable goods, such as foodstuffs, or high-demand retail items. Itâs easy to calculate in theory, but itâs not always easy to interpret.
The retina is the light-sensitive layer at the back of the eye that is responsible for vision. Blood circulation to most of the retina's surface is primarily through one artery and one vein. If either blood vessel or one of their smaller branches is blocked, blood circulation to the retina can be significantly disrupted. The blockage is called an occlusion.
When used to detect whether a heart attack is occurring or may occur, SPECT locates areas of the heart muscle that have inadequate blood flow compared with areas that have normal flow. Inadequate blood flow means that coronary arteries are blocked and a heart attack is occurring. SPECT can also assess how bad the blood flow blockage is. It is a noninvasive imaging scan that exposes you to radiation. For this test, your doctor injects a tiny amount of radioactive tracers through a vein in your arm.