DER is an abbreviation for “dual energy radiography,” a medical imaging technique that uses two different types of x-rays to create a detailed image of the body’s internal structures. This method allows for a more accurate diagnosis of various conditions, as it can differentiate between different types of tissues and highlight abnormalities that may not be visible on a single x-ray. DER is commonly used in orthopedics, as it can provide a clear view of bones, joints, and soft tissues, making it a valuable tool in detecting fractures, dislocations, and other injuries. Additionally, DER is also used in other medical fields, such as cardiology and oncology, to aid in the diagnosis and treatment of various diseases. With its ability to provide a comprehensive and detailed view of the body, DER has become an essential tool in modern medicine.