With the advancement of medical technology, malignant tumors have changed from incurable diseases to chronic diseases that can survive for a long time. The key to treating malignant tumors is early detection, timely removal of lesions, and the sensitivity of tumors to anti-tumor drugs. In these respects, PET-CT (positron emission tomography) has unparalleled advantages as a systemic imaging technique.
At present, the imaging technology level of the Downtown Medical Group has reached the forefront of the city. Wang Yanli, director of the molecular imaging department of the hospital, said that the Central Medical Group established the molecular imaging department in 2007 and introduced the first PET-CT machine in Qingdao, which pioneered the PET-CT diagnosis and treatment service in our city. Now, the Department of Molecular Imaging of the Central Hospital has developed into a teaching department of the Medical College of Qingdao University, a specialist in molecular imaging diagnostics in Qingdao, and a molecular imaging research center in Qingdao. Each year, more than 3,000 people are diagnosed by PET-CT, and the diagnostic accuracy is 96%. the above.
Many people are not familiar with PET-CT. Wang Yanli said that PET-CT is actually a combination of nuclear medicine PET and familiar CT. The principle of PET is to inject a radionuclide tracer into the human body through the vein. Normal cells are not sensitive to this nuclides, but tumor cells can absorb nuclides. These nuclides can emit gamma rays, and PET can be collected. The ray then positions these nuclides.
"PET-CT is a true molecular metabolic imaging. It not only can detect the lesions sensitively in the early stage, but also reflect the functional status of the cells in the lesions." Wang Yanli said that every year, the central medical group receives PET-CT diagnosis. More than 3,000 patients, some of whom are suspected of having a tumor, attempted to find early tumors by PET-CT systemic examination. Many patients found an increase in tumor markers in the blood test, but the patient did not have any symptoms at this time, and the doctor could not determine the location of the tumor. If there is no PET-CT, the patient will use the exclusion method to pass the gastrointestinal microscope. , chest CT and other items to find tumors. The cost of PET-CT single examination is relatively high, but it improves the timeliness and accuracy of treatment, so that patients do not need to check items in multiple departments, saving unnecessary examination costs for patients, and more importantly, from the hands of the disease. Grab" to the time.
"There are still some patients who have been diagnosed with tumors. They are looking for tumor primary tumors and metastases by PET-CT, and staging the tumors. To determine whether the tumors in the patients are malignant, sometimes a needle biopsy is needed, and the tradition is CT and nuclear magnetic can show the lesions, but there is no guarantee that the puncture site is the active area of ​​the tumor. Accurate pathological diagnosis cannot be performed by puncture to the location of tumor necrosis, and PET-CT can guarantee 'one stab is accurate'. During the tumor treatment process PET has been able to clearly show whether the activity of tumor cells is reduced, thus helping doctors to determine whether patients are sensitive to anti-tumor drugs being used, thereby guiding clinicians to choose effective anti-tumor methods, and also providing accurate biological targets for radiotherapy. Positioning."
Doing a PET-CT is not very radiationAlthough PET-CT is a combination of two types of radiation equipment, the CT used in PET-CT is a low-dose CT, and the PET medicine is a short half-life drug that conforms to human physiology. Therefore, the radiation received by PET-CT is No more than one enhanced chest CT. Wang Yanli said that not everyone needs to do PETCT examinations. It should follow the principle of simple to complex, strictly grasp the indications and should not be abused.
The same is how to do PET-CT, how can it reflect the doctor's ability? Wang Yanli said that the value of PETCT doctors is reflected in the accuracy of diagnosis. In this respect, the molecular imaging department of the Central Medical Group has accumulated a lot of experience in the past 10 years. Since the introduction of PET-CT in 2007, the hospital has already received more than 25,000 patients, and has followed up and visited patients. They have contacted the pathology departments of major hospitals, and have continuously summed up experience through actual cases. The accuracy rate is over 96%. Among them, the diagnosis of single solitary pulmonary nodules is difficult, and it is easy to be confused with tuberculosis and fungal infections. Some tumors may also have false negatives, which are easily missed. Through continuous experience, the accuracy of PET-CT diagnosis has been 85. % increased to over 95%.
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