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Chaibi, H, Nourine, R. (1396). New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor. سامانه مدیریت نشریات علمی, 8(1), 53-64.
H Chaibi; R Nourine. "New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor". سامانه مدیریت نشریات علمی, 8, 1, 1396, 53-64.
Chaibi, H, Nourine, R. (1396). 'New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor', سامانه مدیریت نشریات علمی, 8(1), pp. 53-64.
Chaibi, H, Nourine, R. New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor. سامانه مدیریت نشریات علمی, 1396; 8(1): 53-64.

New Pseudo-CT Generation Approach from Magnetic Resonance Imaging using a Local Texture Descriptor

Journal of Biomedical Physics and Engineering
مقاله 6، دوره 8، شماره 1، خرداد 2018، صفحه 53-64    اصل مقاله (1.08 M)
نوع مقاله: Original Research
نویسندگان
H Chaibi* ؛ R Nourine
Lab. LITIO, University of Oran 1 Ahmed Ben Bella- Algeria.
چکیده
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.
کلیدواژه‌ها
Pseudo-CT؛ Attenuation Correction؛ Stereo Matching؛ Local Texture Descriptor for Matching؛ PET/MRI
مراجع
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