影像学名词解释及简单题重点(完全免费)（Interpretation of image terms and simple questions (free of charge)）.docVIP

影像学名词解释及简单题重点(完全免费)（Interpretation of image terms and simple questions (free of charge)） First, the noun explanation, 1 medical imaging: an application of medical imaging equipment to observe the shape and function of organs in the patient and to diagnose and treat the disease. 2 and DSA: digital subtraction angiography (DSA) is a kind of image processing technique which uses computer to process digital image information, eliminates the image of bones and soft tissues, and makes the blood vessels develop clearly. 3, artificial contrast: artificial import of a substance, so that the original organization structure, lack of natural contrast between apparent density difference, so as to improve the display rate of the method is called artificial contrast, import material called contrast or contrast agent. 4, flow void effect in magnetic resonance imaging, because the signal acquisition requires a certain period of time, the rapid flow of blood does not produce or produce only very low signal, in stark contrast with the surrounding tissue and structure. This phenomenon is called flow void effect. Such as the rapid flow of blood within the cardiovascular system. 5 、 bone age: the primary ossification center and secondary ossification center and the age of epiphysis and metaphysis bone union. (diagnostic and endocrine diseases and some congenital malformations are valuable) 6, bone destruction: the local bone is replaced by pathological tissue caused by the disappearance of bone tissue. (of inflammation, tumor, granulomas) 7, bone necrosis: local bone metabolism is stopped, the necrosis of the bone called dead bone. The main reason for the formation of the dead bone is the interruption of blood supply (often seen in chronic pyogenic osteomyelitis and also in avascular necrosis of the bone and traumatic fractures) 8, periosteal triangle (Codman delta): the periosteum and bone tumors involving soft tissue, stimulate periosteal bone formation, and then formed the tumor destr