within the right iliac fossa, there is the appearance of a 'doughnut sign' in trans imaging characterised by concentric alternating echogenic and hypoechoic bands as well as a 'pseudokidney' sign in long images characterised by fat-containing mesentery dragged into the intussusception
the hyperechoic core (mesenteric fat) has a diameter exceeding that of the outer wall, which is suggestive of ileocolic intussusception