Table of Contents
Advertisement
5.10 3D/4D
3D/4D imaging is largely environment-dependent, so the images obtained are
NOTE:
provided for reference only, not for confirming diagnoses.
5.10.1 Overview
Ultrasound data based on three-dimensional imaging methods can be used to image any
structure where a view can't be achieved by standard 2D-mode to improve understanding
of complex structures.
4D provides continuous, high volume acquisition of 3D images. 4D adds the dimension of
"movement" to a 3D image by providing continuous, real-time displays.
Mode definition
Smart 3D
The operator manually moves the probe to change its position/angle when
performing the scanning. After the scanning, the system carries out image
rendering automatically, and then displays a frame of 3D image.
Static 3D
Posit the probe at a fixed place; the probe automatically performs the scanning.
After the scanning is completed, the system carries out image rendering, and
then displays a frame of 3D image.
4D
The probe performs the scanning automatically. During the scanning, the system
renders 3D images in real time, and all 3D images are displayed in real time.
Terms
VR: a three-dimensional content.
Volume data: the image data set of a 3D object rendered from 2D image
sequence.
3D image: the image displayed to represent the volume data.
View point: a position for viewing volume data/3D image.
Section image: tangent planes of the 3D image obtained by algorithm. As shown
in the figure below, XY-paralleled plane is C-section, XZ-paralleled plane is B-
section, and YZ-paralleled plane is A-section. The probe is moved along the X-
axis.
ROI (Region of Interest): a volume box used to determine the height and width of
scanning volume.
VOI (Volume of Interest): a volume box used to determine the area of a sectional
plane for 3D imaging.
5-36 Image Optimization
Advertisement
Table of Contents
