SPHERICAL SPRING STRUCTURES FOR GENERATING CONTRAST FEATURES FOR RADIONUCLIDE PHANTOMS
Publication Date: 2015-Oct-19
The IP.com Prior Art Database
Spherical spring structures for generating contrast features for radionuclide phantoms are disclosed The spherical spring structures may include a bar that increases structural stiffness of the spherical spring structure The spherical spring structures have a continuous gap and structural design that enables generation of consistent contrast features as compared to a dodecahedron structure
The present invention relates generally to imaging techniques, and more particularly to a spherical spring structure for generating contrast features for radionuclide phantoms.
In general, hollow structures are used to create contrast features for the radionuclide phantoms. The hollow structures are printed in defined sizes using 3D printing. The hollow structures are placed into a tank which is filled with beads for example, non-porous beads and a radionuclide solution. The beads have a larger diameter than the hollow structure so that the beads do not enter the hollow structures. Such configuration provides higher concentration for the hollow structures and reduced concentration for the beads and thus creates the contrast features.
Conventionally, dodecahedral structures are primarily utilized for creating the contrast features for the radionuclide phantoms. A dodecahedral structure having 12 sides with two nearby beads is shown in Figure 1. The dodecahedral structures are printed using Nylon and are called Nylon dodecahedrons. However, the Nylon dodecahedrons suffer from various disadvantages. For example, if the Nylon dodecahedrons are placed in water, the Nylon dodecahedrons provide insufficient contrast. For improving the contrast further, a glass is utilized for the printing process. However, using glass dodecahedral structures compromises structural integrity due to the requirement of thin sides. As a result, the dodecahedral structures suffer from insufficient contrast and are unable to customize the contrast features for the radionuclide phantoms.
Therefore, it would be desirable to have an improved structure for generating efficient contrast features for the radionuclide phantoms.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 depicts a conventional dodecahedral structure.
Figure 2 depicts spherical spring structures without a bar.
Figure 3 depicts spherical spring structures with a bar.
Figure 4 depicts views of contrast features for dry and water filled dodecahedral structure.
Figure 5 depicts views of contrast features of dry and wet spherical spring structures with a bar and glass Nylon construction.
This disclosure proposes spherical spring structures for generating contrast features for radionuclide phantoms.