Diagnostic Ultrasound - Abdomen and Pelvis

Uterus
Anatomy: Pelvis
NORMAL SAGITTAL IMAGES OF UTERUS
Bladder
Fundus
Endometrium
Body
Vagina
Isthmus
Myometrium
Parametrium
Cervix
Rectouterine pouch of Douglas
Anterior vaginal fornix
Central line of endometrium
Inner functional layer of endometrium
Basal layer of endometrium
Cervical canal
Inner zone of myometrium
Middle zone of myometrium
Outer zone of myometrium
Arcuate arteries and veins
Endometrium
(Top) Longitudinal TA ultrasound shows a normal anteverted uterus. Version refers to the angle the cervix makes with the vagina. In
this case, the cervix is angled anteriorly and the uterus continues in a straight line with the cervix. This is the most common position
found in the female pelvis. (Middle) Longitudinal TV ultrasound obtained in the secretory phase demonstrates different zones. The
smooth muscle within the inner zone of the myometrium is more compact, making it more hypoechoic (subendometrial halo). The
majority of myometrium is homogeneously echogenic, with the outer zone being less echogenic. (Bottom) Longitudinal transvaginal
scan obtained in the early proliferative phase shows prominent arcuate arteries and veins, which run in the outer 1/3 of the
myometrium. These may become calcified following menopause.
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