Ultrasound is more than normal human ear can hear the sound waves in the frequency of more than 20,000 cycles per second. Use of ultrasound and the physical characteristics of human organs acoustic nature of the differences, to wave, curve or images in the form of display and record up to a diagnosis method is ultrasound examination.
A first use of ultrasound is that it is amplitude modulation, is a Oscillographic ultrasound diagnosis, according to a different judgement reflected wave diseases, diagnosis limited capacity. Later, a B-ultrasound, for luminance modulation type is the type of ultrasound imaging, can show a direct two-dimensional space images, it also called the two-dimensional ultrasound, can be directly observed organ images of greater capacity . , Has emerged D ultrasound, also known as Doppler-type, frequency shift is ultrasound diagnosis, using the Doppler effect, showed that blood flow and organ activities of the signal. In addition, the advent of the M-type, C and T-ultrasound. In recent years, and produce color B-, B super-resolution capacity than the stronger.
Ultrasound technology used in liquid, materiality in the diagnosis, stomach, lung and gastrointestinal tract disease is difficult to distinguish. Ultrasound examination of the lesions found to determine the location and size of lesions relatively easy to determine whether the lesions with liquid or gas is also more reliable, able distinguish between benign and malignant tumors. Ultrasound examination of the heart, abdomen and pelvic organs, including the examination of more pregnancy, such as the liver tumor blood vessels, liver abscesses, liver cirrhosis, gallstones and cancer, spleen and pancreas disease and ascites diagnosis more reliable to the kidneys, bladder , Prostate, adrenal gland, uterus, ovarian, and other diseases than the diagnosis of thyroid, breast disease diagnosis accuracy of the diagnosis of pregnancy, including Abnormal Fetal Position, placental location, multiple births, stillbirths, fetal malformation and mole judgement, have a very high Value. Because CT ultrasound diagnostic apparatus does not seem expensive, lower fees, therefore, more common in the clinical application, before the test preparation is quite simple, such as the liver, bile, pancreas, spleen checks only check the day fasting and ban Water; gynecological examination, prostate, is only Bie enough to urinate. (China Medical Network)
A first use of ultrasound is that it is amplitude modulation, is a Oscillographic ultrasound diagnosis, according to a different judgement reflected wave diseases, diagnosis limited capacity. Later, a B-ultrasound, for luminance modulation type is the type of ultrasound imaging, can show a direct two-dimensional space images, it also called the two-dimensional ultrasound, can be directly observed organ images of greater capacity . , Has emerged D ultrasound, also known as Doppler-type, frequency shift is ultrasound diagnosis, using the Doppler effect, showed that blood flow and organ activities of the signal. In addition, the advent of the M-type, C and T-ultrasound. In recent years, and produce color B-, B super-resolution capacity than the stronger.
Ultrasound technology used in liquid, materiality in the diagnosis, stomach, lung and gastrointestinal tract disease is difficult to distinguish. Ultrasound examination of the lesions found to determine the location and size of lesions relatively easy to determine whether the lesions with liquid or gas is also more reliable, able distinguish between benign and malignant tumors. Ultrasound examination of the heart, abdomen and pelvic organs, including the examination of more pregnancy, such as the liver tumor blood vessels, liver abscesses, liver cirrhosis, gallstones and cancer, spleen and pancreas disease and ascites diagnosis more reliable to the kidneys, bladder , Prostate, adrenal gland, uterus, ovarian, and other diseases than the diagnosis of thyroid, breast disease diagnosis accuracy of the diagnosis of pregnancy, including Abnormal Fetal Position, placental location, multiple births, stillbirths, fetal malformation and mole judgement, have a very high Value. Because CT ultrasound diagnostic apparatus does not seem expensive, lower fees, therefore, more common in the clinical application, before the test preparation is quite simple, such as the liver, bile, pancreas, spleen checks only check the day fasting and ban Water; gynecological examination, prostate, is only Bie enough to urinate. (China Medical Network)
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