3D ultrasound guidance system for needle placement procedures
2008
This paper presents an ultrasound guidance system for needle placement procedures. The system integrates a real-time
3D ultrasound transducer with a 3D localizer and a tracked needle to enable real-time visualization of the needle in
ultrasound. The system uses data streaming to transfer real-time ultrasound volumetric images to a separate workstation
for visualization. Multi-planar reconstructions of the ultrasound volume are computed at the workstation using the
tracking information, allowing for real-time visualization of the needle in ultrasound without aligning the needle with the
transducer. The system may simplify the needle placement procedure and potentially reduce the levels of skill and
training needed to perform accurate needle placements. The physician can therefore focus on the needle placement
procedure without paying extra attention to perfect mid-plane alignment of the needle with the ultrasound image plane.
In addition, the physician has real-time visual feedback of the needle and the target, even before the needle enters the
patient's skin, allowing the procedure to be easily, safely and accurately planned. The superimposed needle can also
greatly improve the sometimes poor visualization of the needle in an ultrasound image (e.g. in between ribs). Since the
free-hand needle is not inserted through any fixed needle channel, the physician can enjoy full freedom to select the
needle's orientation or position. No cumbersome accessories are attached to the ultrasound transducer, allowing the
physician to use his or her previous experience with regular ultrasound transducers. 3D Display of the target in relation
to the treatment volume can help verify adequacy of tumor ablation as well.
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