Ultrasound images of spleen

The normal spleen has a fine, homogeneous texture, with smooth margins and a pointed inferior edge. It has similar echogenicity to the liver but may be slightly hypo- or hyperechoic in some subjects. Sound attenuation through the spleen is less than that through the liver, requiring the operator to ‘flatten’ the time gain compensation controls in order to maintain an even level of echoes throughout the organ. The main splenic artery and vein and their branches may be demonstrated at the splenic hilum (Fig.below).
Left coronal view of the normal spleen demonstrating the main splenic artery and vein at the hilum.
Transverse section (TS) demonstrating the splenic vein at the hilum
By increasing the Doppler sensitivity, the intrasplenic perfusion can be demonstrated.
An elongated or enlarged spleen can be displayed more fully using an extended field of view. Shadowing from the ribs (arrows) is evident. The spleen provides an excellent acoustic window to the upper pole of the left kidney, the left adrenal gland and the tail of the pancreas.
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