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Four-dimensional cone-beam computed tomography and digital tomosynthesis reconstructions using respiratory signals extracted from transcutaneously inserted metal markers for liver SBRTa)
a)Conflicts of interest: There is no conflict of interest and this is not under consideration for publication elsewhere.
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10.1118/1.3544369
/content/aapm/journal/medphys/38/2/10.1118/1.3544369
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/2/10.1118/1.3544369
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

General workflow of the fiducial marker extraction algorithm.

Image of FIG. 2.
FIG. 2.

Signal profiling workflow to estimate motion signals in the missing margin.

Image of FIG. 3.
FIG. 3.

An anthropomorphic thorax phantom on a programmable motion platform.

Image of FIG. 4.
FIG. 4.

A typical projection image with marker localization using (a) the marker extraction algorithm and (b) manual check-off.

Image of FIG. 5.
FIG. 5.

Comparison of input signal versus extracted signal for (a) a sine wave with 1.5 cm amplitude and 4 s period and (b) an irregular patient breathing pattern.

Image of FIG. 6.
FIG. 6.

Overlay of signals extracted using the marker extraction algorithm and the manual check-off for four patient cases.

Image of FIG. 7.
FIG. 7.

A typical signal pattern obtained by diaphragm tracking and marker tracking.

Image of FIG. 8.
FIG. 8.

A typical signal pattern obtained by internal marker tracking and external marker tracking.

Image of FIG. 9.
FIG. 9.

Marker signal and its corresponding phase/amplitude estimates through signal profiling (a) prior to and (b) after the implementation.

Image of FIG. 10.
FIG. 10.

Marker signals reconstructed for four patient cases.

Image of FIG. 11.
FIG. 11.

Phase- and amplitude-sorted (a) 4DCBCT and (b) 4DDTS images with the reference 3D image at the left.

Image of FIG. 12.
FIG. 12.

Magnified view of the midinhale and midlow images in Fig. 11.

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/content/aapm/journal/medphys/38/2/10.1118/1.3544369
2011-01-31
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Four-dimensional cone-beam computed tomography and digital tomosynthesis reconstructions using respiratory signals extracted from transcutaneously inserted metal markers for liver SBRTa)
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/2/10.1118/1.3544369
10.1118/1.3544369
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