Ultrasound Scanners

4D Ultrasound Machine

4D Ultrasound Machine is 3D imaging allows for the visualization of fetal structures. And the internal anatomy as static 3D images. Comparatively, 4D ultrasounds allow for a live-streaming video of the images. Showing the motion of the fetal heart wall or valves. As well as the current blood that is flowing through various vessels. In short, 4D ultrasound imaging is a 3D ultrasound in live motion. 4D ultrasounds utilize either a 2D transducer, which rapidly acquires 20-30 volumes or a matrix array. Which instead uses a 3D transducer.

The clinical applications of 4D ultrasound technology are still being studied. This is because many unregulated centers will offer these videos as entertainment ultrasounds, which violates the As Low As Reasonably Achievable (ALARA) principle governing the medical use of diagnostic imaging.

Additional disadvantages of this non-medical use of 4D ultrasounds include:

• The machines may use higher-than-usual levels of ultrasound energy, which can have potential side effects on the fetus.
• Uncertified or untrained operators may lead to missed or inadequate diagnoses since they are not required to be certified by law.

3D Ultrasound Machine

The technology behind 3D ultrasound thus has to deal with image volume data acquisition, volume data analysis, and volume display.

Volume data is acquired using three techniques:

• Freehand movements of the probe, with or without position sensors to form the images.
• Mechanical sensors built into the probe head.
• Matrix array sensors, use one single sweep to acquire a considerable amount of data. The operator can then extract any view or plane of interest, which helps to visualize the structures in terms of their morphology, size, and relationship with each other.

Data can be displayed using either a multiplanar format or rendering of images, which is a computerized process that fills in the gaps to create a smooth 3D image. There is also a tomographic mode that allows the viewing of numerous parallel slices in the transverse plane from the 3D or four-dimensional (4D) data set. The multiplanar format allows the operator to evaluate several 2D planes at the same time.

Thus, for instance, while visualizing the fetal heart, the operator is able to summon any of the classical fetal heart views by moving the reference dot, be it four-chamber, three-vessel, or any other plane of interest.  The Doppler settings help to display the movement of blood through the various chambers and valves.