The examination for the detection of congenital anomalies is referred to as either detailed ultrasound study or targeted imaging for fetal anomalies (TIFFA) 3, 4 In such examinations, a variety of fetal anatomic views (âtargetsâ') are specifically sought after and imaged by experienced ultrasonographers.
Turbidity is measured in NTU: Nephelometric Turbidity Units. The instrument used for measuring it is called nephelometer or turbidimeter, which measures the intensity of light scattered at 90 degrees as a beam of light passes through a water sample.
Turbidity can be caused by:â¢ organic particles, such as decomposed plant and animal matter, or living biological organisms (ex: algae) â¢ inorganic particles (silt, clay and natural chemical compounds like calcium carbonate)Turbidity in surface water bodies usually has organic and inorganic matter.