B ultrasound, color ultrasound, CT is the same point is the use of imaging technology to check the body, the differences are as follows:
One of the different principles of the examination
1, CT examination principle is the X-ray will be layered through the human body, and then through the computer calculations after the second imaging.
2, the principle of ultrasound is to use ultrasound to penetrate the human body, when the sound wave encountered different tissues, especially the tissue interface will produce reflective waves, ultrasound probe on one side of the ultrasound, the other side of the reflective wave acceptance, and through the calculation of reflective wave imaging.
3, color ultrasound is a high-definition black-and-white ultrasound coupled with color Doppler, both with the advantages of two-dimensional ultrasound structural images, but also at the same time provide a wealth of information on hemodynamics.
Second, the respective advantages of different
1, CT examination can be layered to see, and after calculation can show more tissue information.
2, ultrasound can be multi-directional observation, real-time imaging.
3, color ultrasound resolution is higher than B ultrasound, more functions, inspection scope and content is more detailed and wider.
Three, their respective shortcomings are different:
1, CT examination is more expensive, and the radiation dose of CT examination is usually higher than that of a single radiography.
2, ultrasound: Because ultrasound is greatly interfered by gas, for the intestines and other organs containing more gas, ultrasound diagnostic accuracy will be reduced, so the general intestinal examination using enteroscopy .
3, color ultrasound on the fetus than black and white ultrasound to be greater, early pregnancy doctors generally recommend pregnant women to do B ultrasound, mid-pregnancy only to do color ultrasound detector or record fetal activity.
Fourth, the clinical application of different
1, CT examination can show a clear structure, the brain, chest lesions detected higher sensitivity.
2, ultrasound can check the abdomen and pelvis in addition to the intestines, such as the fetus during pregnancy; in addition, the thyroid and other superficial organs, as well as the liver, spleen, pancreas, kidneys, pelvis and other parenchymal organs, ultrasound diagnosis of accuracy are higher.
3, color ultrasound has more probes, wider probing area, can get clear information about blood vessels and blood flow, more diagnostic value; in addition to the abdominal cavity, it can also be used for the heart, abdominal organs, superficial skin, eyes, and other parts of the examination, as well as maternal and fetal examination; on the glands and other small organs, the examination is more delicate.
Reference:
Baidu Encyclopedia - B-mode ultrasonography ( Ultrasound)
Baidu Encyclopedia - CT (Computed Tomography)
Baidu Encyclopedia - Color Ultrasound