Fig. 1
From: Zone-specific reference ranges of fetal adrenal artery Doppler indices: a longitudinal study
The color Doppler of A) the inferior adrenal artery and B) the middle adrenal artery. a IAA mainly branches obliquely from the proximal segment of the renal artery and then travels along the upper pole of the kidney with a curved course, supplying the posterior and inferolateral outer zone of the gland. b MAA travels along the single central adrenal vein in the medial part of the gland. IAA, inferior adrenal artery; RK, right kidney; AO, aorta; MAA, middle adrenal artery; AV, adrenal vein; IPA, inferior phrenic artery