Respiratory Motion Compensation Using Diaphragm Tracking for Cone-Beam C-Arm CT: A Simulation and a Phantom Study

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="520540.fig.005a" src="https://static.hindawi.com/articles/ijbi/volume-2013/520540/figures/520540.fig.005a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b> No compensation. SSIM: <svg height="11.225" id="M87" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 28.475 11.225" width="28.475" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="520540.fig.005b" src="https://static.hindawi.com/articles/ijbi/volume-2013/520540/figures/520540.fig.005b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Compensation with tracked signal. SSIM: <svg height="11.125" id="M88" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 28.475 11.125" width="28.475" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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q0 -76 10 -138.5t37 -107.5t69 -45q32 0 55.5 25t35.5 68.5t17.5 91.5t5.5 105t-5.5 105.5t-18 92t-36 68t-56.5 24.5z" id="x30"></path></g><g transform="matrix(.017,-0,0,-.017,8.222,10.862)"><path d="M113 -12q-24 0 -39.5 16t-15.5 42q0 24 16 40.5t40 16.5t40 -16.5t16 -40.5q0 -26 -16 -42t-41 -16z" id="x2E"></path></g><g transform="matrix(.017,-0,0,-.017,12.098,10.862)"><path d="M249 635q70 0 116 -43t46 -105q0 -46 -28 -80q-22 -25 -80 -64q62 -35 97 -75t35 -99q0 -81 -63 -131t-135 -50q-83 0 -137.5 45.5t-54.5 123.5q0 52 45 95q29 28 89 64q-109 62 -109 155q0 66 50.5 115t128.5 49zM238 603q-42 0 -67.5 -31t-25.5 -72q0 -50 32.5 -79.5
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</svg></td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="520540.fig.005c" src="https://static.hindawi.com/articles/ijbi/volume-2013/520540/figures/520540.fig.005c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Compensation with optimal signal. SSIM: <svg height="11.125" id="M89" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 28.475 11.125" width="28.475" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg></td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="520540.fig.005d" src="https://static.hindawi.com/articles/ijbi/volume-2013/520540/figures/520540.fig.005d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Ground truth</td></tr></table></td></tr></table>

<table>Comparison of <svg height="8.4250002" id="M86" style="vertical-align:-0.273pt" version="1.1" viewbox="0 0 18.0875 8.4250002" width="18.0875" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg>-slice 60 of compensated and uncompensated volumes (cf. Figure <a href="../fig3/#b">3(b)</a>). Line profiles were taken at the position of the red lines.</table>

International Journal of Biomedical Imaging

fig5

Figure 5

Figure 5: Respiratory Motion Compensation Using Diaphragm Tracking for Cone-Beam C-Arm CT: A Simulation and a Phantom Study 