The Transcerebellar Diameter (TCD)
sonography
ultrasound
obstetric ultrasound
ultrasound training
maternal fetal medicine
fetal ultrasound
fetal biometry
usg
ultrasound course
fetal brain
cerebellum diameter measurement
cerebellum ultrasound
fetal brain anatomy ultrasound
fetal cerebellum measurement
fetal posterior fossa anatomy
how to measure cerebellum ultrasound
cisterna magna
fetal medicine
fetal neurosonography
tcd ultrasound
posterior fossa ultrasound
tcd
pcf
transcerebellar diameter
Learn to master the Transcerebellar Diameter (TCD), a key measurement for catching posterior fossa abnormalities. This module covers normal cerebellar anatomy, the 'mm = weeks' rule for gestational age correlation, and common pitfalls to avoid during assessment.
Mastery Reward
Complete this lesson and pass the quiz to earn 10 Karma Points and move one step closer to your Essentials of Fetal Biometry Certification.
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1.
To lock in the perfect anterior plane before measuring the TCD, which landmarks are absolutely non-negotiable?
2.
What is the absolute golden rule for normal Transcerebellar Diameter (TCD) measurements in the second trimester?
3.
You notice the cerebellum has lost its classic "dumbbell/butterfly" shape and looks curved around the brainstem. What's this red flag called?
4.
You measure a abnormally small TCD and notice the cisterna magna is practically invisible. What does this posterior fossa crowding strongly suggest?