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Technical Note: Correlation of respiratory motion between external patient surface and internal anatomical landmarks
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10.1118/1.3589131
/content/aapm/journal/medphys/38/6/10.1118/1.3589131
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/6/10.1118/1.3589131
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Thirteen anatomical internal landmarks identified by radiation oncologists covering both normal and tumor structures.

Image of FIG. 2.
FIG. 2.

Distance between the position of one of the considered anatomical landmarks (higher right diaphragm position) throughout the respiratory cycle as identified in the 4D CT image series.

Image of FIG. 3.
FIG. 3.

Analysis of the correlation between (a) six small regions of interest placed on the external surface (3 pixels diameter) and the internal landmarks (L1–L13) shown in Fig. 1. (b) Mean and standard deviation (error bars) of the measured motion correlation. Correlation between the motion of each external circular ROI considered with (c) the normal structure landmarks and (d) tumor landmarks motion.

Image of FIG. 4.
FIG. 4.

Analysis of the correlation between (a) 14 rectangular regions covering the majority of the external surface and the internal landmarks (L1–L13) shown in Fig. 1. (b) Mean and standard deviation (error bars) of the measured motion correlation. Correlation between the motion of each external rectangular ROI considered with (c) the normal structure landmarks and (d) tumor landmarks motion.

Image of FIG. 5.
FIG. 5.

Analysis of the correlation between (a) 11 square ROIs covering the abdominal region of the external patient surface and the internal landmarks (L1–L13) shown in Fig. 1. Mean and standard deviation (error bars) of the measured motion correlation (b) considering all of the internal anatomical landmarks and (c) after removal of the anatomical landmarks demonstrating very small respiratory motion (apex and sternum).

Image of FIG. 6.
FIG. 6.

Patient specific measurements (a) 1D respiratory traces used in the synchronization process of the 4D CT acquisitions. (b) Correlation between different external abdominal ROIs [shown in Fig. 5(a)] and internal anatomical landmarks corresponding to normal structures (c) Correlation between different external abdominal ROIs [shown in Fig. 5(a)] and internal tumor landmarks.

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/content/aapm/journal/medphys/38/6/10.1118/1.3589131
2011-05-31
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Technical Note: Correlation of respiratory motion between external patient surface and internal anatomical landmarks
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/6/10.1118/1.3589131
10.1118/1.3589131
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