Ultrasonography is now the most widely used imaging method in medicine. But it also contains some disadvantages: for example, the fine detail of the generated images is low; the results are also dependent on the experience of the examiner.
Another shortcoming is the lack of reproducibility of the images. In order to eliminate these disadvantages, instead of using classic sonography which is based on the ‘phased array’ method, the holographic sonography or 3D ultrasonic holography demonstrates new and efficient technology to perfection.
The holographic ultrasound has several clear advantages over classic sonography: For example, 100percent of the scattered or reflected sound waves can be evaluated from the perspective of their information content. Since there is no phase noise with holographic ultrasound and only one barrier – sound wave diffraction – holographic ultrasound achieves a significant increase in resolution. By using ‘very clean’ sound waves (i.e. with very well-defined phases), no information is lost during the process. The conventional method, however, does lose valuable information as the waves created by the superposition of different waves are generated by several transmitters, thus being able to create a clean wave by interference only in certain points. But there are also areas where the waves do not interfere favourably from the standpoint of image formation – causing artefacts – and opposing anything real. The classic technique is also not able to provide 3D information directly. The customary market-based sonography devices only produce cross-sectional images of a relatively thick, averaged layer, which are then assembled into a three-dimensional image. Using our 3D ultrasonic holography, it is possible to directly generate many three-dimensional images per second in real time, which can be reproduced an optional amount of times.
A further advantage of holographic ultrasound is the fast and efficient learning stage for staff in our easy-to-use technology. The behaviour of the measuring head is simple, because the sound wave includes greater range: unlike traditional ultrasound, where the measuring head has to be moved several times to capture different structures from all possible angles of incidence, the 3D holographic method only has to be applied in one position to gather and generate the same and more information in a shorter time frame and at higher resolution. The electronics used can generate stronger impulses which is advantageous especially when a greater range is necessary and/or desired. Furthermore, 3D ultrasonic holography enables the production of portable 3D sonography devices.