Contrast-enhanced Ultrasound in Patients With Crohn´s Disease and Food Allergy

Inclusion Criteria: * Age over 18 * Endoscopically and histologically confirmed active Crohn´s disease or * Previously proven food allergy (double-blind or single-blind food challenge tests with placebo controls previously before the sonographic examination, increased blood and / or intestinal Immunoglobulin E levels, elevated methylhistamine values under provocation and with reproducible reactions during food challenge procedures) or * Healthy individuals without abdominal complaints Exclusion Criteria: * Age under 18 * Intolerance of the ultrasound contrast agent SonoVue * Refusal of participation in the study * Pregnancy or breast-feeding