Amar Trivedi Ultrasound Scan for Midwives: Identification of fetal head in 3 rd trimester
Different shades of black and white in an image • Shades of black and white in an image depend upon the tissue reflectivity of the ultrasound beam • There is very little reflection from the fluid, hence the image will be black (anechoic), like blood, urine or amniotic fluid • There is highest reflection from the bones, hence the image will be bright white (hyperechoic), like a human skull, vertebra • There is variable reflection from the soft tissues, hence the image of the soft tissues will be in different shades of grey, like human brain
left right Hold the transducer with the marking on the left side pointing towards patient’s right side
OP OP
Head Head
Footling breech Fetal lower abdomen
Abdomen- kidneys Scrotum
Abdomen Head
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