What is the difference between high-resolution CT and ordinary CT?

The difference between high-resolution ct and ordinary ct lies in:

1, the image resolution of high-resolution ct is higher than that of ordinary ct, so high-resolution ct is suitable for the examination of pulmonary nodules and will not miss the diagnosis; Ordinary ct examination is not clear enough to show the fine structure of the tumor, such as whether there are burrs around the nodules and whether there is necrosis inside, but high-resolution ct can do it, which is very important for the qualitative diagnosis of the lesions.

2. The scanning slice thickness of high-resolution ct is much thinner than that of ordinary ct; Some clinical lesions need three-dimensional reconstruction after scanning to help determine the surgical plan. Many image reconstructions after ordinary ct scanning can not meet the requirements, so high-resolution ct examination is necessary.

The advantages and disadvantages of ct are related:

1, advantages

CT diagnosis has been widely used in clinic because of its special diagnostic value. And with the development of science and computer technology, CT has developed rapidly. The practical model of multi-row spiral CT has increased to 320 rows, and various manufacturers are also studying more advanced flat CT. PET/CT is a combination of CT and PET, which is widely used in clinic, especially in the diagnosis of tumors.

2. Deficiencies

CT equipment is expensive, and the inspection cost is high. The diagnostic value of some parts, especially qualitative diagnosis, is still limited. Therefore, CT examination should not be regarded as a routine diagnostic method, but should be reasonably selected and applied on the basis of understanding its advantages. In addition, the radiation dose of CT diagnosis is larger than that of ordinary X-ray machine, so pregnant women should not do CT examination.