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Interactive prostate shape
reconstruction from 3D TRUS images
As a part of
an ongoing effort to develop computerized training tools for cryosurgery,
this study presents a two-step, semi-automated method for reconstructing a
three-dimensional (3D) shape of the prostate from a 3D transrectal ultrasound
(TRUS) image. While the method has been developed for ultrasound imaging of
the prostate, it can potentially be applicable to any other organ of the body
and other imaging modalities.
Below is a
step-by-step demonstration how the method can be implemented:
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The user controls the position and
orientation of the cross-sectional plane by moving the mouse in both
horizontal and vertical directions. The cross-sectional image is
updated in real-time, with a refreshing rate of 5-10 frames per second.
Translational
view change
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The
developed GUI system allows the user to adjust the intensity and contrast
of a cross-sectional image in real-time, by a combination of a keystroke
and mouse movement.
3D
view
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The
developed GUI system allows the user to adjust the intensity and contrast
of a cross-sectional image in real-time, by a combination of a keystroke
and mouse movement.
2D
view
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The user
controls the position and orientation of the cross-sectional plane by
moving the mouse in both horizontal and vertical directions. The
cross-sectional image is updated in real-time, with a refreshing rate of
5-10 frames per second.
Rotational
view change
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By using
a mouse, the user draws an arbitrary number of partial contours of a
prostate on a cross-sectional image.
Partial
contour drawing
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During or
after the specification of partial contours, the user can freely add,
delete, and move control points. Each partial contour is represented
by a sequence of multiple cubic curves.
Contour
editing
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The
developed GUI system is easy-to-use and sufficiently efficient to specify a
set of 10 ~ 15 cross-sectional planes and 20 ~ 30 partial contours within a
few minutes.
Specified
partial contours
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It is
confirmed that a 3D watertight surface of the prostate can be generated
within five minutes even from a volumetric image with a high level of
speckles and shadow noises. The output 3D prostate shapes have been
successfully used in a computer-assisted training system for prostate
cryosurgery.
Result
example 1
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It is
confirmed that a 3D watertight surface of the prostate can be generated
within five minutes even from a volumetric image with a high level of
speckles and shadow noises. The output 3D prostate shapes have been
successfully used in a computer-assisted training system for prostate
cryosurgery.
Result
example 2
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Review
of the process
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Reference:
•
Furuhata,
T., Song, I., Rabin, Y., Shimada, K. (2014): Interactive prostate shape
reconstruction from 3D TRUS images, Journal of Computational Design and Engineering,
1(4):272-288 ScienceDirect,
BTTL
Depository
This
research has been supported, in part, by the National Cancer Institute, NIH
Grant # 1R01CA134261
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