**6.2 CT-scan and abdominal magnetic resonance imaging**

The efficacy of contrast enhanced CT-scan imaging has been validated and can be quite helpful in an emergency situation since it is not radiologist dependent and might sometimes be faster to access. Thus, it remains a perfect choice for acute pictures such as diagnostic evaluation of splenic torsion associated to a wandering spleen with a high risk of ischemia. It is the whorled appearance of the splenic vessels and surrounding fat that is considered pathognomonic of that condition. (Gomez et al, 2006). However even if this examination is well indicated in adults, CT-scan should remain a last-resort examination in children because of radiation exposure (Ben et al, 2006; Marinaccio et al, 2005). Abdominal magnetic resonance imaging (MRI) (Fig 7-8-9), since it does not require any anesthesia seems to be a good alternative to CT-scan for adults or older children with chronic pain. However, because it is not available in all clinical settings, it can limit its indications. It can also be recommended for uncomplicated chronic types.
