OBS & GYNAE - Ch. 16 Assess. of Foetal Age and Size in the Second and Third Trimester Flashcards

1
Q

AXIAL RESOLUTION

A

MINIMUM DISTANCE BETWEEN TWO BRIGHT ECHOES ALONG THE PATH OF THE ULTRASOUND BEAM, WHICH IS HALF THE SPATIAL PULSE LENGTH

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2
Q

CEPHALIC INDEX (CI)

A

RATIO OF THE BPD (BIPARIETAL DIAMETER) TO THE OFD (OCCIPITO-FRONTAL DIAMETER)

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3
Q

LATERAL RESOLUTION

A

MINIMUM DISTANCE BETWEEN TWO BRIGHT ECHOES AT RIGHT ANGLES (PERPENDICULAR) TO THE ULTRASOUND BEAM PATH DIRECTLY RELATED TO THE BEAM WIDTH AND FOCAL ZONE

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4
Q

MARCROSOMIA

A

FOETUS OVER 4, 000 GRAMS (8 POUNDS, 13 OUNCES)

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5
Q

OCCIPITO-FRONTAL DIAMETER (OFD)

A

MEASUREMENT FROM FRONTAL TO THE OCCIPITAL OBTAINED AT THE SAME LEVEL AS THE BPD

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6
Q

PREDICTIVE VALUE

A

PRECISION RATE OR THE PROBABILITY OF DISEASE

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