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Development of a three-dimensional freehand endorectal ultrasound system for use in rectal cancer imaging
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10.1118/1.1925228
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    Affiliations:
    1 Department of Biomedical Engineering, Vanderbilt University, Station B, Box 351631, Nashville, Tennessee 37235-1631
    2 Department of General Surgery, Vanderbilt University, 1161 21st Ave., D-5220 MCN, Nashville, Tennessee 37232
    3 Department of Biomedical Engineering, Vanderbilt University, Station B, Box 351631, Nashville, Tennessee 37235-1631
    4 Department of Biomedical Engineering, Vanderbilt University, Station B, Box 351631, Nashville, Tennessee 37235-1631, and Department of General Surgery, Vanderbilt University, 1161 21st Ave., D-5220 MCN, Nashville, Tennessee 37232
    5 Department of Biomedical Engineering, Vanderbilt University, Station B, Box 351631, Nashville, Tennessee 37235-1631, and Department of Neurological Surgery, Vanderbilt University, T-4224 MCN, Nashville, TN 37232-2380
    Med. Phys. 32, 1757 (2005); http://dx.doi.org/10.1118/1.1925228
/content/aapm/journal/medphys/32/6/10.1118/1.1925228
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/6/10.1118/1.1925228

Figures

Image of FIG. 1.
FIG. 1.

A cross-sectional representation of the rectum with the six layers labeled.

Image of FIG. 2.
FIG. 2.

ERUS probe with attached optical tracking device (RB1).

Image of FIG. 3.
FIG. 3.

(a) Pen probe RB2, (b) Tracked rigid-body reference object RB3.

Image of FIG. 4.
FIG. 4.

Schematic of TERUS probe with imaging plane.

Image of FIG. 5.
FIG. 5.

TERUS calibration setup.

Image of FIG. 6.
FIG. 6.

TERUS calibration data point.

Image of FIG. 7.
FIG. 7.

The calculated plane (+) and the collected calibration data points , 38 points, .

Image of FIG. 8.
FIG. 8.

The calculated plane (+) and the collected calibration data points , 38 points, .

Image of FIG. 9.
FIG. 9.

Cross-sectional view of rectal phantom with fiducial CT caps.

Image of FIG. 10.
FIG. 10.

(a) This is a still frame image taken with the tracked ERUS probe and shows one of the targets in the phantom. (b) This image shows one of the targets in the phantom from the CT image set.

Tables

Generic image for table
TABLE I.

2D vs 3D ERUS for the staging of rectal cancer. This table has been adapted from reference 12

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TABLE II.

ERUS Calibration Database for 5, 7, and . and scale factors are shown, and can be seen to be consistent across all frequencies (the TMs show the same consistency, but are not shown for the sake of space). Also, the FRE and TRE are shown for each combination of frequency and depth setting. The depth setting is a radial measure in mm, the scale factors are in mm/pixel, and the FRE and TRE values are reported in mm.

Generic image for table
TABLE III.

(a) ERUS calibration error (mm) at , radial depth setting; (b) CT to physical space rigid registration error (mm).

Generic image for table
TABLE IV.

Rectal phantom average target registration error and standard deviation at , radial depth setting. A comparison of the target center in CT to the target edge in ultrasound. All units are in mm.

Generic image for table
TABLE V.

Rectal phantom average target registration error and standard deviation at , radial depth setting. A comparison of the target center in CT to the target edge in ultrasound corrected for the speed of sound in phantom. All units are in mm.

Generic image for table
TABLE VI.

Rectal phantom average target registration error and standard deviation at the , radial depth setting. Corrected for a comparison of the target edge in CT to the target edge in ultrasound. All units are in mm.

Generic image for table
TABLE VII.

In plane error determination (avg of 20 localizations) for trained and untrained users. Corrected for target edge to edge comparison.

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/content/aapm/journal/medphys/32/6/10.1118/1.1925228
2005-05-25
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Development of a three-dimensional freehand endorectal ultrasound system for use in rectal cancer imaging
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/32/6/10.1118/1.1925228
10.1118/1.1925228
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