Imaging technology
Since the development of medical imaging, in addition to X-ray, there are other imaging technologies, and a variety of imaging technology applications have been developed. In addition, in the application of biomedical information, the digital image files and image digitized files that can be generated can be exchanged and consulted, and the technology of the medical digital image transmission protocol has been developed.
Commonly used medical imaging technologies include:
Angiography: or arterial photography, angiography, is the use of x-rays to irradiate the human body to observe the distribution of blood vessels, including arteries, veins, or atria and ventricles.
Cardiovascular imaging: Contrast agent is quickly injected into the heart cavity or blood vessel through a cardiac catheter, so that the heart and blood vessel cavity can be developed under X-ray irradiation. At the same time, there are methods such as rapid filming, television photography or video tape to visualize the heart and blood vessel cavity. After the process is photographed, the blood flow sequence containing the contrast agent and the filling of the heart and blood vessels can be seen from the results of the visualization, so as to understand the physiological and anatomical changes of the heart and blood vessels. It is a valuable method for diagnosing cardiovascular disease.
Computerized tomography, or electronic computerized tomography, can be divided into X-ray CT (X-CT), ultrasound CT (UCT) and γ-ray CT (γ-CT) according to the different radiation used.
Mammography: It uses low-dose (approximately 0.7 millisievert) X-rays to examine the breasts of humans (mainly women). It can detect various breast tumors, cysts and other lesions, helping to detect breast cancer early.
Positron emission tomography: is a nuclear medicine imaging technology that provides three-dimensional and functional images of the whole body. It is currently the only technology that uses anatomical morphology to perform function, metabolism and receptor imaging. It has the characteristics of non-invasiveness and is currently one of the best methods for clinical diagnosis and guidance of tumor treatment.
Magnetic resonance imaging: The electromagnetic waves emitted are detected by applying a gradient magnetic field, based on which the internal structure of the human body can be drawn.
Medical ultrasound examination: using the physical characteristics of ultrasound, through electronic engineering technology to quickly analyze, process and visualize ultrasound transmission, reception, conversion and electronic computers, so as to make judgments on the physical characteristics, morphological structure and functional state of human soft tissues A non-invasive examination method that visualizes muscles and internal organs, including their size, structure, and pathological lesions.
