Medical imaging examination is an important way for us to conduct physical examinations in hospitals, such as CT and B-ultrasound examinations, etc. Each examination has its own role and application advantages. However, do you understand the differences between various imaging examination techniques? Let's learn together with the author today!
1、 X-ray examination
X-rays have strong penetrating power through the body, and the subject is like taking a flat image of the examined area during the examination. The density index of the body tissue in the examined area is uneven, and the color of the imaging results will show corresponding differences. This method is usually used for initial screening of diseases and has lower examination costs. Due to the uneven density of the irradiated object, the film after inspection will form black and white colors. Usually, the color of the bones on the film tends to be white, while the imaging of soft tissues is unclear. However, the results of this examination method are two-dimensional plane images, which are easily affected by factors such as the clothing of the examinee, and the accuracy of the examination results needs to be improved. It should be noted that X-ray examination may produce slight radiation, so pregnant women and those preparing for pregnancy should choose carefully.
2、 CT
In a sense, CT can be seen as an enhanced version of X-ray. Usually, when the results cannot be confirmed by X-ray examination, CT examination is needed to further clarify the lesion situation, which is more effective than X-ray and more expensive. The application of CT examination can not only display the tissue structure of the examined part of the body more clearly, but also clearly see the degree of bone health. It has important application significance for the diagnosis and treatment of various organ diseases, head diseases, and central nervous system diseases in the body. At the same time, it can also be used for the diagnosis and treatment of dangerous diseases such as head tumors, lymph node enlargement, lung nodules, and coronary heart disease. The radiation generated by this inspection method is higher than that of X-rays, but the inspection results are also more accurate.
3、 Ultrasound
Ultrasound examination is a type of imaging examination that we are more familiar with, mainly imaging through the reflection effect of ultrasound in the body, used for preliminary diagnosis of diseases. This examination method has the characteristics of non radiation and high safety, and has unique features in detecting human soft tissues and observing blood flow in blood vessels. Pregnant women can also undergo the examination at an appropriate time. However, the ultrasound penetration ability of B-ultrasound examination is relatively low, making it difficult to detect gas containing organs or smaller lesions.
4、 Magnetic resonance imaging (MRI) is mainly performed by stimulating the sufficient vibration of water in the body tissue through the action of a magnetic field, and imaging the differences in vibration effects in various parts of the body tissue to clarify the relevant conditions of the lesion. This examination method is the most expensive among the above-mentioned examinations, but its imaging quality is better, and it can be sliced at any angle at will. It also shows better anatomy and lesions of the brain, spine (excluding the word 'and spine'), etc. than CT. However, the examination effect on lungs, bones, and fractures is usually not as good as CT. It should be noted that if the examinee has metal objects or a pacemaker in their body during MRI examination, they should not undergo MRI examination and should inform the doctor before the examination.
In summary, different imaging examinations have their own characteristics, and we must combine our own actual situation and follow the doctor's advice to make a scientific choice of examination methods.