Incorporating sheet-likeness information in intensity-based lung CT image registration | Posted on:2014-10-20 | Degree:M.S | Type:Thesis | University:The University of Iowa | Candidate:Kim, Yang Wook | Full Text:PDF | GTID:2458390005487287 | Subject:Biomedical engineering | Abstract/Summary: | | Image registration is a useful technique to measure the change between two or more images. Lung CT image registration is widely used an non-invasive method to measure the lung function changes. Non-invasive lung function measurement accuracy highly depends on lung CT image registration accuracy. Improving the registration accuracy is an important issue.;In this thesis, we propose incorporating information of the anatomical structure of the lung (fissures) as an additional cost function of the lung CT image registration. The intensity-based similarity measurement method (sum of the squared tissue volume differences) is also used to complement lung tissue information matching. However, since fissures are hard to segment, a sheet-likeness filter is applied to detect fissure-like structures. Sheet-likeness is used as an additional cost function of the intensity-based registration. The registration accuracy is verified by the visual assessment and landmark error measurement. The landmark error measurement can show an improvement of the proposed algorithm. | Keywords/Search Tags: | CT image, Lung CT, Landmark error measurement, Information, Intensity-based, Sheet-likeness, Additional cost function | | Related items |
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