Generally speaking, the CT examinations involved in the general physical examination or registration examination that people receive in the hospital are plain scan CT. This type of CT examination only requires the patient to lie on the examination instrument and adjust himself. Breathing, it only takes a few seconds to complete a scan and present a relatively clear image. Doctors can detect some lung diseases through such images.

However, this examination method has certain limitations. It is difficult to make a complete and accurate diagnosis of some diseased tissues in the lungs, and it is also difficult to judge the nature of the diseased tissues present in the body. Reasons etc. However, enhanced CT can make up for such shortcomings.

So the first difference between them is the effectiveness of the examination. Plain CT can diagnose common physical diseases or simple lesions. However, enhanced CT can provide a more detailed understanding of the nature of the lesion, including the detection rate of the lesion, diagnostic properties, and the internal vascular structure, which can be seen more intuitively. Enhanced CT can also help with tumor staging and surgical arrangements. It allows doctors to obtain more information in a simple CT examination, which is more helpful in diagnosing and identifying the type of lesions.

Secondly, there are also certain differences in the inspection methods. Plain CT only requires people to lie on the hospital bed and complete a scan in a very short time. However, enhanced CT requires more preparation. First, before receiving the scan, the patient needs to be injected with a certain contrast agent. This contrast agent can gradually enter the examination site in the blood circulation, and can assist the doctor to see the internal structure of the organ through examination. The blood flow direction, the vascular structure of the diseased tissue and some details are more helpful in forming a clear image.

Compared with plain CT, the former can only obtain one scanned picture, while the latter can adopt a dynamic observation method and can see different stages such as the arterial phase and portal venous phase of some tissue lesions. , which can assist doctors in characterizing diseased tissues. Therefore, many doctors will recommend patients to receive enhanced CT when plain CT cannot diagnose the condition.

There are also different situations where plain CT and enhanced CT are applicable. Most doctors in emergency departments will choose plain scan because they can quickly make a preliminary diagnosis. For diseases such as pulmonary contusion and cerebral hemorrhage, plain CT can already meet the needs of examination.

Enhanced CT requires the patient's body to be able to withstand a certain amount of iodinated contrast agent. Patients with allergies, liver and kidney dysfunction, or hyperthyroidism cannot undergo enhanced CT examination. It is likely that the injected contrast agent may cause discomfort such as rash and itching in the patient. In severe cases, it may aggravate liver and kidney damage, thyroid damage, dyspnea and other allergic reactions.

From this, people can know that, also for CT, plain CT can give examination results faster and make accurate diagnosis of some common diseases, while enhanced CT can provide a more detailed understanding of The condition of the diseased tissue is helpful for doctors to characterize the diseased tissue and formulate treatment plans.