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New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chaibi, Hasna Nourine, Rachid |
| Copyright Year | 2018 |
| Abstract | Background One of the challenges of PET/MRI combined systems is to derive an attenuation map to correct the PET image. For that, the pseudo-CT image could be used to correct the attenuation. Until now, most existing scientific researches construct this pseudo-CT image using the registration techniques. However, these techniques suffer from the local minima of the non-rigid deformation energy function which leads to unsatisfactory results. Objective We propose in this paper a new approach for the generation of a pseudo-CT image from an MR image. Materials and Methods This approach is based on a dense stereo matching concept, for that, we encode each pixel according to a shape related coordinates method, and we apply a local texture descriptor to put into correspondence pixels between MRI patient and MRI atlas images. The proposed approach was tested on a real MRI data, and in order to show the effectiveness of the proposed local descriptor, it has been compared to three other local descriptors: SIFT, SURF and DAISY. Also it was compared to registration method. Results The calculation of structural similarity (SSIM) index and DICE coefficients, between the pseudo-CT image and the corresponding real CT image show that the proposed stereo matching approach outperforms a registration one. Conclusion The use of dense matching with atlas promises good results in the creation of pseudo-CT. The proposed approach can be recommended as an alternative to registration techniques. |
| Starting Page | 53 |
| Ending Page | 64 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.22086/jbpe.v0i0.641 |
| PubMed reference number | 29732340 |
| Journal | Medline |
| Volume Number | 8 |
| Alternate Webpage(s) | http://www.jbpe.org/Journal_OJS/JBPE/index.php/jbpe/article/download/641/412 |
| Alternate Webpage(s) | https://doi.org/10.22086/jbpe.v0i0.641 |
| Journal | Journal of biomedical physics & engineering |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
