What's the difference between ECT and CT?

First of all, the principle is different

1, ECT: Radioactive drugs are introduced into human body, and after metabolism, a radioactive concentration difference is formed in organs outside ECT or between the lesion and normal tissues. These differences will be detected and re-imaged by computer processing.

2.CT: X-ray beams are used to scan a layer of human body with a certain thickness, and the X-rays passing through this layer are received by the detector, converted into visible light, converted into electrical signals through photoelectric conversion, and then converted into numbers through an A/D converter, and input into a computer for processing.

Second, the characteristics are different.

1, ECT:ECT imaging is a highly specific functional imaging and molecular imaging, which not only displays the structure, but also focuses on providing functional information of organs and normal tissues.

2.CT: It has the characteristics of fast scanning time and clear image.

Third, the use is different.

1, ECT: It is mainly used for the examination of thyroid cancer, bones and other tumors, especially the detection of bone metastases, which can find lesions 3-6 months earlier than ordinary X-ray films.

2.CT: used for medical examination, industrial examination and safety inspection.

Baidu encyclopedia -ECT

Baidu encyclopedia -CT