CT of the heart and great vessels, especially the latter, is of great importance. The main aspect of the heart is the diagnosis of pericardial lesions. The display of the heart chambers and walls. Because the scanning time is generally longer than the cardiac cycle, affecting the clarity of the image, the diagnostic value is limited. However, calcification of coronary arteries and heart valves, calcification of the walls of large blood vessels and aneurysm changes can be well displayed by CT examination.
CT examination of the central nervous system disease diagnostic value is high, the application is common. It is effective and reliable in diagnosing intracranial tumors, abscesses and granulomas, parasitic diseases, traumatic hematoma and brain injury, cerebral infarction and cerebral hemorrhage, as well as intravertebral tumors and intervertebral disc prolapse.
Therefore, in addition to cerebral angiography, which is still used to diagnose intracranial aneurysms, vascular developmental abnormalities and cerebral vascular occlusion, as well as to understand the arteries supplying blood to brain tumors, others, such as pneumoencephalography and cerebral ventriculography, have been used sparingly. Spiral CT scanning, which can obtain relatively fine and clear angiographic reconstruction images, i.e., CTA, and can do three-dimensional real-time display, is expected to replace the conventional cerebral angiography.
Expanded information:
Advantages
CT diagnosis has been widely used in the clinic due to its special diagnostic value. And with the development of process level and computer technology, CT has been developed rapidly. The multi-row spiral CT has been developed to 320 rows, while various manufacturers are also researching more advanced flat-panel CT.
PET/CT, a product of the combination of CT and PET, has been commonly used in clinical practice, especially in the diagnosis of tumors, which has a very high application value.
Disadvantages
CT equipment is relatively expensive, high cost of examination, certain parts of the examination, diagnostic value, especially qualitative diagnosis, there are certain limits, so it is not appropriate to consider CT examination as a routine diagnostic means, should be based on the understanding of the advantages of its reasonable choice of application. In addition, CT diagnostic radiation dose is greater than ordinary X-ray machine, so pregnant women should not CT examination.
Baidu Encyclopedia-CT