O ultrassom é realmente preto e branco?
"Doctor, what I'm going to do is a color ultrasound, why is this black and white?" Often patients return to the ultrasound clinic with aggrieved faces and ask the doctor about the ultrasound results. At this time, the sonographer is also helpless. Today I will explain to you why color Doppler images are often not in color.
O Doppler colorido entendido pelas pessoas comuns é que as imagens obtidas pelo exame de ultrassom são coloridas e o coração é vermelho? Gall é verde? A bexiga é amarela? Oh não, este não é um ultrassom colorido, mas uma história em quadrinhos.
In fact, the full name of color Doppler ultrasound is color Doppler ultrasound, that is, color Doppler technology is added on the basis of B-mode ultrasound. B-mode ultrasound is the basis for disease diagnosis, and it mainly depends on the shape and location of lesions and the internal structure. Color Doppler is a technology that displays blood perfusion in organs and lesions, which can provide more information for disease diagnosis, which is the icing on the cake. It uses different colors and brightness to distinguish the direction and speed of blood flow, so when the color Doppler function is turned on, red or blue blood flow information will appear on the image, so it is called "color Doppler" , but this function cannot be activated all the time, just turn it on when needed, otherwise it will be difficult to clearly display the shape and location of the lesion, so you will lose sight of the other. Therefore, "color ultrasound" is black and white most of the time. At present, most of the ultrasound examination equipment in hospitals basically have the function of color Doppler, so you don't have to worry about your loss.
O ultrassom é prejudicial ao corpo humano?
Patients often ask nervously before the examination: "Doctor, I just had a B-ultrasound a few days ago. Will it be harmful to my body if I do it again today?" At this time, the doctor will tell the patient decisively: "Don't worry, it's okay!" Ultrasonography is a non-invasive, ionizing radiation-free examination, different from X-ray and CT examinations. Ultrasound imaging is based on ultrasound, which is a sound wave with a frequency higher than what the human ear can hear. At present, ultrasound equipment for clinical diagnosis is on the market, and its output sound intensity and sound pressure are strictly limited to prevent damage to the inspection object. The ultrasound examination done every year in the world ranks first in all imaging examinations. The study and many years of follow-up validation did not find any evidence of side effects from ultrasonography. Think about it, everyone. The main method of prenatal diagnosis is ultrasound examination. Even the most vulnerable baby can withstand multiple ultrasound examinations. What are you afraid of? So, whether you've just had an ultrasound for a check-up or are preparing for a baby, don't worry about getting an ultrasound!
