First, the role is different:
Four-dimensional ultrasound provides more abundant image information for clinical ultrasound diagnosis, reduces the missed diagnosis of lesions and improves the quality of diagnosis. It is suitable for the examination of heart, liver, gallbladder, spleen, pancreas, obstetrics and gynecology, peripheral blood vessels and soft tissues. The abnormality of fetal neural tube is mainly screened, and the baby's facial features, limbs and internal organs are examined by B-ultrasound. Blood test and urine test are general routine examinations, mainly to see if there is anemia.
Second, the technology is different:
Four-dimensional mainly uses four-dimensional medical color ultrasound imaging technology. 4D medical ultrasound imaging technology is the latest medical ultrasound imaging technology since entering 2 1 century, which can obtain three-dimensional images in real time, exceeding the limitations of traditional ultrasound. Three-dimensional color Doppler ultrasound technology and four-dimensional medical color ultrasound imaging technology are mainly used for large-scale teratogenesis.
Extended data:
Four-dimensional echocardiography is a new ultrasonic diagnostic technique with great potential. During the examination, a multi-plane transesophageal ultrasound probe is placed on the chest or inserted into the esophagus, and a series of two-dimensional images of 90 directions with the same axis and an included angle of 20 are collected, which are digitized and stored by a three-dimensional image reconstruction computer, and then a dynamic three-dimensional heart structure diagram with gray scale and overall display is built according to its phase and position.
Four-dimensional ultrasound imaging was used to diagnose fetal malformation, and all clinical cases obtained satisfactory sectional images. At the same time, it was found that the sensitivity, specificity and accuracy of four-dimensional ultrasound in the diagnosis of fetal malformation were higher than those of other ultrasonic diagnostic equipment, and it could provide more diagnostic information and enhance doctors' diagnostic confidence.
References:
Baidu encyclopedia-four-dimensional color Doppler ultrasound
Baidu encyclopedia-abnormality check