ECT has a certain role in suggesting primary foci, but it may not necessarily detect the primary foci of scattered and diffuse tumors, and is currently used for metastasis of bone tumors and primary bone foci. ECT can be used to detect lesions in a certain organ or a certain tissue and to check the function of the organ. It is mainly used for the examination of thyroid cancer, bone and other parts of the tumor, and especially commonly used for the detection of bone metastatic tumors. ECT has many imaging modes, including planar imaging and tomographic imaging, static imaging and dynamic imaging, local imaging and whole-body imaging, which can effectively image a certain part of the body to detect lesions. ECT can detect the primary foci of some tumors, but it needs to be combined with the actual situation of the patients themselves, and at the same time, it needs to improve other examinations to make a comprehensive judgment, so as to make a clear diagnosis and early treatment. ECT is recommended to go to regular hospitals for examination.