The main diagnostic tool is a good physical exam by an experienced surgeon looking also for associated hernias. A CT scan could be performed to confirm and grade the rectus muscle separation. Recently, ultrasound has been shown to provide accurate information regarding the separation’s extent without using radiation or incurring additional costs. Separation is measured in the abdomen at five locations above and below the belly button. A separation of more than 3 cm is considered abnormal. Additionally, imaging can reveal the presence of a genuine hole in the wall, commonly referred to ads a hernia.