There is no specific time limit on how often an electron computed tomography scan, or ECT, should be done, but it is not advisable to do ECT scans frequently. Patients should follow the doctor’s instructions for the examination, there is generally no specific time limit for the interval, pregnant women should not do computed tomography. Electronic computed tomography is mainly the use of X-ray beams, ultrasound and detector together around a part of the body to do tomography, as an auxiliary examination of disease. There are no strict clinical regulations on how often ECT should be done, but patients should not undergo frequent ECT examinations. Patients should consult with their doctors before undergoing an ECT scan, and there is generally no limit to the interval between scans when a test is necessary. For routine checkups, once every 1 to 2 years is sufficient. Specific patients may need to have a CT scan every 3 to 6 months, and patients with acute cerebral hemorrhage should have a CT scan every 6 hours in the early stages of the disease to monitor changes in the hematoma. It is important to note that pregnant women should not undergo computed tomography scanning to prevent the effects of radiation during computed tomography scanning on fetal development. There are no regulations on how often an ECT scan should be done, and patients should do the test under the guidance of their doctor.