The clinical diagnosis of diseases cannot be achieved solely through visual observation, which is also an important driving factor for the sustained development of medical imaging diagnosis in China. Medical imaging diagnosis is an indispensable component of modern medicine in China. The future development of this technology has a direct impact on the development of medical technology in China, and even affects whether patients can receive timely and effective diagnosis and treatment. So, summarize the following medical imaging diagnostic methods:
1. Magnetic resonance imaging (MRI)
MRI is a high-tech imaging examination technique widely used in clinical practice, with high resolution of soft tissue, multi-directional and multi parameter imaging, no bone artifacts, no ionizing radiation damage, and no need to use contrast agents to display significant features such as human vascular structure. This technology uses radio frequency electromagnetic waves to excite mastoid tissue placed in a magnetic field, forming magnetic resonance. Then, induction coils are used to collect magnetic resonance signals and digital images are established through mathematical processing. Compared with CT examination with single density parameter imaging, MRI examination can perform MR diffusion imaging, MR water imaging, MR spectral detection, MR functional imaging, MR vascular imaging, etc. due to its characteristics of multi orientation, multi sequence, and multi parameter. The morphology of lesions in the patient's body and their relationship with surrounding tissues can be clearly and intuitively displayed, which can better detect early small lesions. In addition, MRI has high accuracy in diagnosing lesions, and the application of different specific imaging sequences and methods to display lesion characteristics further enhances the ability of disease differentiation and diagnosis.
2. Computer tomography (CT)
The principle of CT imaging is to continuously scan a certain part of the human body with an X-ray beam, which has the characteristics of clear images and fast scanning. Generally, CT scans are divided into contrast-enhanced and plain scans, where contrast-enhanced scans are performed by injecting contrast agents such as iodixanol intravenously with a high-pressure injector. When the iodine concentration in the blood increases, there will be differences in iodine concentration and density between organs and lesions, which will improve the clarity of the lesions. Plain scanning is applied to tissues with high contrast, such as bones and lungs. Most tumor examinations of tissues and organs require enhanced scanning to obtain accurate diagnostic results.
3. Ultrasound
Ultrasound is the most frequently used imaging technique for clinical diagnosis of diseases. This technique collects reflected ultrasound waves and analyzes and processes the information carried by them to form images. With the help of this technology, medicine can quickly locate the specific location of the pathogen, observe its composition, and clarify its nature. Due to the absence of ionizing radiation in ultrasound examination, repeated use under treatment conditions will not harm the human body. At the same time, ultrasound examination can accurately determine the soft tissue condition of the examination site, quickly form pixels and images, and enable patients to obtain examination results in a timely manner, facilitating diagnosis by doctors. In recent years, with the vigorous development of medical technology, clinical two-dimensional ultrasound has transitioned to three-dimensional ultrasound, and even shifted from three-dimensional ultrasound to four-dimensional ultrasound. Clinical diagnostic technology has developed rapidly, which has to some extent expanded the development space of ultrasound. The clinical application of ultrasound diagnosis of diseases can not only obtain high-definition images, but also clearly display the tissue structure, providing doctors with valuable pathological information for reference. In addition, ultrasound elastography technology can determine tissue hardness from image color based on different tissue elasticity coefficients, effectively distinguish between benign and malignant tissue, and improve diagnostic level.