CT scan may be helpful in the diagnosis of<unk>  scan maybe used when other image modalities like x-ray and ultrasound have not given positive results but suspicion of intussusception is high. CT scan is also used to characterize the pathology (lead point) once intussusception has been diagnosed by ultrasound. CT scan has its  drawbacks in children as it is time consuming and leads to substantial radiation exposure.
Intussusception CT
Intussusception x ray
Intussusception ultrasound
Intussusception physical examination
Meckel's diverticulum x ray
Meckel's diverticulum CT
Meckel's diverticulum MRI
Ileus physical examination