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.
This technology has recently been adapted for use in the water treatment field. The number, size, shape and composition of particles in a water sample affects the turbidity. Turbidity is therefore more of an index of water quality. Particle counters on the other hand, size and count particles.Particle counting and its technology extends the sensitivity of measuring particles beyond that achievable from turbidimeters.his pulse is proportional to the size of the particles and is measured in height and tabulated according to its respective particle size. At the end of the sample period the counts for each specified particle size range are totaled and the particle counts are calculated and presented on a count per milliliter basis.