Standard x-ray imaging is currently the gold standard for diagnosing bone fracture in children, however there is an evolving body of data on the use of ultrasonography for diagnosis of fractures in pediatric patients. In addition to an anatomical restriction to the upper limb, there is still a limit at the age of the patient group, 0 to 12 years. The distal forearm can be diagnosed by ultrasonography and the necessary therapy can be controlled. In the case of the proximal humerus, it is even spoken of a superiority of ultrasonography over X-ray. Around the elbow the positive or negative fat- pad- sign appears as a significant diagnostic indication of a possible fracture. The medical history and a clinical examination is also required as a prerequisite for a high-quality diagnosis. The initial studies have demonstrated potential for diagnostic superiority over conventional radiographs without radiation exposure, and the object of this thesis is to discuss the technical process of image acquisition, image quality and analysis and describe the role of ultrasonography in the fracture diagnosis algorithm (“sonographic algorithms of fracture evaluation”).