As the name suggests, black and white ultrasound images are in black and white. Color ultrasound is based on black and white ultrasound with the addition of color, but this color is pseudo-color, which is red and blue to show the blood flow of the human heart and larger blood vessels, which is helpful in the diagnosis of cardiac anomalies and abnormalities of blood flow in the heart and large blood vessels. In addition to having color to help show blood flow, color ultrasound is generally more configurable, has a higher resolution and sensitivity, there will be more features to choose from, the application of a wider range of more advanced technology.
Two-dimensional color ultrasound (2D) Vs three-dimensional color ultrasound (3D) Vs four-dimensional color ultrasound (4D)In the clinic, when we say to do color ultrasound, we mean two-dimensional color ultrasound, the image seen is a two-dimensional flat image. Three-dimensional ultrasound is based on two-dimensional ultrasound added another spatial axis, can form a static three-dimensional image, four-dimensional ultrasound is real-time three-dimensional, is based on three-dimensional ultrasound added a time axis, three-dimensional image is active, three-dimensional and four-dimensional image is based on two-dimensional plane image through the ultrasound equipment in the software calculation of the conversion of the generation.
Is 3D/4D better than 2D color ultrasound for mid-pregnancy screening for fetal macrosomiaWhen screening for fetal macrosomia, the detection rate of fetal structural anomalies is largely dependent on the level of care provided by the physician, not on the use of 3D/4D technology, as shown by the American College of Obstetricians and Gynecologists (ACOG), the Society of Obstetricians and Gynecologists of Canada (SOGC) and the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG). Ultrasound Society (ISUOG), routinely recommend 2D color ultrasound in their clinical guidelines for mid-pregnancy gross malformation screening. There is no complete international consensus*** regarding the use of 3D/4D color ultrasound in the screening of fetal malformations, and some literature suggests that 3D/4D color ultrasound may be more helpful in certain fetal body surface malformations (e.g., harelip) and a few fetal cardiac malformations.
In some medical institutions in China, 3D/4D color ultrasound is advertised as state-of-the-art high technology, used as a signboard to solicit patients, and recommended as routine for screening for macrosomia. This claim is not scientific and this practice is not reliable.
Non-medical uses of 3D/4D color ultrasoundThe American College of Obstetricians and Gynecologists (ACOG), the Society of Obstetricians and Gynecologists of Canada (SOGC), and the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) have all issued specific statements against non-medical "recreational" ultrasound, which includes the identification of the sex of the fetus and the use of ultrasound without medical evidence. This includes fetal sex determination and the taking of fetal photographs or videos without medical evidence. While there is no conclusive evidence to support that this has both immediate and long-term adverse effects on the fetus, it is at least ethically inappropriate.