Between PET-CT and enhanced CT, PET-CT is more accurate in diagnosing tumors, which can be compared in terms of examination scope, examination accuracy and examination nature.
1. Scope of examination: Enhanced CT mainly examines the local part of the lesion and cannot scan the whole body, so it may cause the tumor metastasis to be missed when examining the tumor. PET-CT can examine the local area and also scan the whole body, thus avoiding the omission of tumor metastases.
2. Accuracy: Enhanced CT can detect tumors with a diameter of 1 cm, while PET-CT can detect tumors with a diameter of about 0.2 cm with high accuracy.
3. Nature of examination: Enhanced CT is to hit the contrast agent into the blood vessels, and then judge the nature of the lesion through the contrast of the contrast agent in the lesion area, which is better for diagnosing some tumors with blood supply characteristics such as hepatocellular carcinoma and hemangioma. PET-CT can make early diagnosis and staging of tumor, determine whether the tumor has recurrence or not, and accurately find metastatic foci, which is extremely helpful for doctors to decide the treatment method and judge its efficacy.
To sum up, on the whole, PET-CT is more accurate in the diagnosis of tumor.