Another is a patient-centred coordinate system. This approach minimises accidental loss of data. We have avoided the use of a keyboard and a computer mouse since these are neither robust nor practical in a clinical environment. We have assumed that the sonographer's attention is devoted to the patient and to optimising the 2D image quality via the scanner's controls. Ideally, we require hands-free operation.
System features Motion gated acquisition .
This is an important aspect of 2D scanning which allows the clinician to distinguish artifact from genuine structure, yet it can be lost when 3D voxel reconstructions are made. The problem with 3D ultrasound systems is not usually one of providing functionality, but rather, restricting its use. Presenting the user with limited options and standard radiological views can assist the comprehension of anatomical structures in the data. Consequently, we guide the user through the process of acquiring 3D data by presenting them with the minimum number of choices at each stage in the process. We make the task as sequential as possible.