Radionuclide scanning and CT examination can diagnose lung cancer

Imaging examinations for lung cancer include radionuclide scanning and CT examinations. The specific manifestations are as follows:

Radionuclide scanning

The difference between the amount of radionuclides taken up by tumor cells and normal tissues is used to locate and qualitatively diagnose tumors. The method is simple and non-invasive. There are two methods currently used: one is radionuclide tumor positive imaging, and the other is separate immune tumor imaging. The former uses tumor marker compounds as imaging agents for tumor imaging; the latter uses radionuclide labeled tumor antigens or their neoplastic antigens to prepare specific antibodies as imaging agents for tumor localization diagnosis. It has high specificity, but the preparation process is complicated, there are many influencing factors, and the stability is not as good as the former. Positron emission tomography technology uses 18C acetic acid and other methods to accurately diagnose lung cancer <1cm and whether multiple lymph nodes of lung cancer have metastases.

CT

The advantage of CT is that it can find anatomical results that cannot be shown by X-rays, especially those located behind the heart, in the paraspinal groove, at the apex of the lung, near the diaphragm, and in the rib head. It can also identify whether there is enlargement of the hilar and mediastinal lymph nodes. If the diameter of the mediastinal lymph nodes is greater than 20mm, the tumor invades multiple fat spaces or surrounds large blood vessels, surgery is basically impossible. CT can also find whether the tumor directly invades adjacent organs. Spiral CT can often find lesions larger than 3mm. Its detection rate for metastatic cancer is higher than that of ordinary tomography.