Development of an interactive software application to model patientpopulations in the 4D NURBS-based cardiac torso phantom
Segars, W.P.; Lalush, D.S.; Tsui, B.M.W.
Nuclear Science Symposium Conference Record, 2000 IEEE
Volume 3, Issue , 2000 Page(s):20/51 - 20/55 vol.3
Digital Object Identifier 10.1109/NSSMIC.2000.949317
Summary:The 4D NURBS-based Cardiac Torso (NCAT) phantom was developed to
provide a realistic and flexible computerized torso phantom to be used
in medical imaging research. The organ shapes in the NURBS-based phantom
are modeled with non-uniform rational b-splines or NURBS surfaces using
the Visible Human CT data set as the basis for the formation of the
surfaces. Since it is based on human data, the phantom has the ability
to model organ shape and anatomical variations more realistically than
phantoms based on simple geometric primitives. To this point, the NCAT
phantom has been limited to simulating variations upon the anatomy of
the Visible Male. The authors extend the abilities of the phantom to
include simulation of female patients. Two breast models, simulating the
prone and supine positions, were developed using 3D NURBS surfaces. As
is the case with the other organs of the torso, the NURBS definition of
the breasts allows a high degree of flexibility to model anatomical
variations. The authors develop an interactive software application that
will allow a user to modify the NURBS surfaces that define the different
organs of the NCAT phantom in order to generate male and female patients
with varying anatomy. The software application provides 3D and 2D views
of the phantom and includes several transformations that can be used to
alter the anatomy. It also includes the ability to import patient data
from which the user can manipulate the organs of the phantom to match
the specific patient anatomy. It is concluded that this software
application is a useful resource in creating patients with varying
anatomy to be used in medical imaging research studies that involve a
population of patients
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