Research Article

Improving Intensity-Based Lung CT Registration Accuracy Utilizing Vascular Information

Figure 7

Vessel positioning errors (mm) on target vessel tree. Results are generated from eight registration methods. Arrows denote regions of large discrepancies between the deformed source and target vessel trees. Note that the errors in these regions were reduced after adding the SSVMD constraint to the registration algorithms.
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(a) SSD
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(b) SSD + SSVMD
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(c) MI
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(d) MI + SSVMD
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(e) NCC
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(f) NCC + SSVMD
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(g) SSTVD
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(h) SSTVD + SSVMD