4D computed tomography makes the tumor invisible.

Low radiation and high quality high-order computed tomography of tumor motion.

Mr. Wu, 50, is the head of the family. He is busy with work and play. In recent months, he always felt that eating and swallowing were not smooth and he lost about five pounds. Later, Mr. Wu went to the outpatient department of gastroenterology. After endoscopic examination, he found that there was a tumor in the esophagus adjacent to the stomach, which was confirmed to be malignant by biopsy. Later, Mr. Wu learned that Annan Hospital had introduced a brand-new advanced positron emission tomography (PET/CT), so he went to the oncology clinic of Annan Hospital for treatment.

Annan Hospital introduced advanced computerized tomography technology.

Dr. Lin, Department of Nuclear Medicine, Annan Hospital, said that the new advanced positron emission tomography (PET/CT) can provide functional nuclear medical imaging with low radiation dose, high quality and high precision, which is helpful to improve the quality of cancer diagnosis and tumor treatment and provide better medical services for cancer patients. In addition, using 4D computed tomography, the patient's respiratory fluctuation can be detected, and the tumor position can be tracked more clearly.

Positron photography is more effective in evaluating cancer.

Positron photography takes advantage of the fact that cells can absorb glucose as energy. After injecting the patients with drugs, they were scanned all over the body and locally. Because cancer cells can absorb a lot of these nutrients, this kind of examination is very helpful for the treatment, evaluation and tracking of cancer. Dr Zhan Kaixiang from the Department of Radiation Oncology of Annan Hospital said that using 4D computed tomography is very helpful for tumors located in the chest, such as lung cancer and esophageal cancer. For example, Mr. Wu is an esophageal cancer patient. The high-resolution images obtained by 4D high-order positron emission tomography (PET/CT) can overcome the possible errors caused by breathing, and then cooperate with the accurate radiotherapy plan to treat Mr. Wu.

4-D computed tomography can track the changes of cancer cells more clearly.

Director Lin Mingxian of Department of Hematology Oncology, Annan Hospital pointed out that positron emission tomography is very helpful for the diagnosis and treatment of cancer patients. At present, health insurance covers the staging and suspected recurrence of breast cancer, lymphoma, colorectal cancer, rectal cancer, esophageal cancer, head and neck cancer (excluding brain tumor), primary lung cancer, melanoma cancer, thyroid cancer and cervical cancer. However, the diagnostic rate of positron emission tomography for all cancers is not high, and it must be judged by clinicians according to the situation of each patient.

At present, in many tumor treatment guidelines, it is suggested that radiotherapy can be combined with positron emission tomography (PET/CT) to determine the irradiation area, and even some studies are still discussing whether to give intensive dose radiotherapy to some tumors with high positron emission tomography activity. In addition, 4D computed tomography (CT) is very helpful for lung cancer or esophageal cancer, which will change its position due to breathing. Like the latest stereotactic radiotherapy for lung cancer abroad, many studies show that the treatment range can be determined by combining positron images.

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