1. Different functions
PET-CT perfectly integrates PET and CT. PET provides detailed functional and metabolic information of the lesion, while CT provides the precise anatomy of the lesion. Positioning, one imaging can obtain tomographic images from all directions of the whole body. It is sensitive, accurate, specific and precise in positioning. It can clearly understand the overall condition of the whole body and achieve the purpose of early detection of lesions and diagnosis of diseases.
ECT is an emission computed tomography scanner. It is an inspection method that uses radionuclides. The basic principle of ECT imaging: radioactive drugs are introduced into the human body, and after metabolism, radioactive concentration differences are formed inside the organs and outside the ECT or between diseased parts and normal tissues. These differences will be detected and re-imaged through computer processing.
2. Different characteristics
PET-CT is a perfect integration of the functions of the highest-end PET scanner and advanced spiral CT equipment. It is mainly used in clinical fields such as tumors, brain and heart. Early detection and diagnosis of serious diseases.
ECT imaging is a type of functional imaging and molecular imaging with high specificity. In addition to showing the structure, it also focuses on providing functional information on organs and endogenous tissues.
3. Different functions
The unique function of PET is based on metabolic imaging and quantitative analysis, using short-lived nuclides that constitute the main elements of the human body, such as 11C, 13N, 15O, and 18F. Using positron nuclides as tracers, not only can multi-slice tomographic images, three-dimensional quantitative results and three-dimensional whole body scans be quickly obtained, but also physiological and biochemical changes of metabolites or drugs in the human body can be dynamically observed from the molecular level.
The imaging method of ECT is very flexible and can perform planar imaging and tomographic imaging, static imaging and dynamic imaging, local imaging and whole-body imaging. In addition, it can also provide a variety of functional parameters of organs, such as time-radioactivity curves, etc., providing multi-faceted information for tumor diagnosis and treatment.
Baidu Encyclopedia-ECT
Baidu Encyclopedia-PET-CT