Transverse ultrasound image, ventral view of the penis.

Transverse ultrasound image, ventral view of the penis. Image obtained after induction of an erection, 15 min after injection of prostaglandin E1, showing dilated sinusoids (arrows). | Maitê Aline Vieira Fernandes, Luis Ronan Marquez, Ferreira de Souza and Luciano Pousa Cartafina3 – (2018). “Ultrasound evaluation of the penis”. Radiologia Brasileira 51 (4): 257–261. DOI:10.1590/0100-3984.2016.0152. ISSN 1678-7099.CC-BY license, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=77309498