| Presentation | 2012-01-19 Improvement of RG/BH PET image quality using motion vector field estimated from inhalation and exhalation CT images Masayuki KANAI, Yoshitaka TAMAI, Atsushi SAKOHIRA, Kazuyoshi SUGA, Hideaki HANEISHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Lung motion due to respiration causes image degradation in medical imaging, especially in nuclear medicine which requires long acquisition time. We have developed a method for image correction between the respiration-gated (RG) PET images in different respiration phases or breath-hold (BH) PET images in inconsistent respiration phase. In the method, the RG or BH PET images in different respiration phase are deformed under two criteria; similarity of image density distribution and smoothness of estimated motion vector field (MVF). However, only these criteria may cause un-natural motion estimation of lung in case that the image contrast is low and thus the texture information doesn't function for image registration. Recently, PET-CT scanners are getting popular. CT images offer high contrast anatomical images and thus it is easier to obtain accurate motion information from inhalation and exhalation CT images. In this paper, assuming the use of a PET-CT scanner, we add another criterion that is the similarity to the motion direction estimated from inhalation and exhalation CT images. The proposed method was applied to XCAT phantom image data and seven patients' BH-PET image data. Successful registration results were obtained by the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | PET / CT / Deformation and summation / PET-CT scanner / Breath-hold / Respiratory-gated |
| Paper # | MI2011-80 |
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| Conference Information | |
| Committee | MI |
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| Conference Date | 2012/1/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Medical Imaging (MI) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of RG/BH PET image quality using motion vector field estimated from inhalation and exhalation CT images |
| Sub Title (in English) | |
| Keyword(1) | PET |
| Keyword(2) | CT |
| Keyword(3) | Deformation and summation |
| Keyword(4) | PET-CT scanner |
| Keyword(5) | Breath-hold |
| Keyword(6) | Respiratory-gated |
| 1st Author's Name | Masayuki KANAI |
| 1st Author's Affiliation | Graduate School of Engineering, Chiba University() |
| 2nd Author's Name | Yoshitaka TAMAI |
| 2nd Author's Affiliation | St. Hill Hospital |
| 3rd Author's Name | Atsushi SAKOHIRA |
| 3rd Author's Affiliation | St. Hill Hospital |
| 4th Author's Name | Kazuyoshi SUGA |
| 4th Author's Affiliation | St. Hill Hospital |
| 5th Author's Name | Hideaki HANEISHI |
| 5th Author's Affiliation | Research Center for Frontier Medical Engineering, Chiba University |
| Date | 2012-01-19 |
| Paper # | MI2011-80 |
| Volume (vol) | vol.111 |
| Number (no) | 389 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |