| Presentation | 2011-01-19 Estimation of lung motion from CT images in different respiratory phases and its application to improvement of PET image quality Masayuki KANAI, Hideaki HANEISHI, Kyouka KOBUNA, Hidenori UE, Yoshitaka TAMAI, Atsushi SAKOHIRA, Kazuyoshi SUGA, |
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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. The method offers the motion field vector of lung from the PET image set and the motion field vector plays a role for image summation of the RGPET images. This technique is applied to a set of breath-hold (BH) PET images in this paper. In the BH method, a patient is asked to hold his/her breath for 10 to 30 s as the image acquisition is performed. This is repeated several times and the obtained images are summed. In practice, however, a patient cannot necessarily hold his/her breath at the same timing of breathing. In such a case, the summed images still has a blur. We have proposed to apply our image registration method developed before for RG images to BH images. The BH images are nonlinearly motion-corrected so as to match a reference BH image and summed. In this paper, we introduced a new constraint on the motion vector field. Based on the use of PET/CT, we assumed to obtain two CT images; one is inhalation, the other is exhalation. From these images, we first calculated the motion vector field. In the registration of PET images, the motion correction of local point is limited to the direction given by those obtained by CT images. Through the experiment with six patient BH image data, we confirmed that the proposed method is effective in obtaining a non-blurred image. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | PET / CT / Attenuation Correction / Motion Correction / Breath-hold |
| Paper # | MI2010-86 |
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| Conference Information | |
| Committee | MI |
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| Conference Date | 2011/1/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| 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) | Estimation of lung motion from CT images in different respiratory phases and its application to improvement of PET image quality |
| Sub Title (in English) | |
| Keyword(1) | PET |
| Keyword(2) | CT |
| Keyword(3) | Attenuation Correction |
| Keyword(4) | Motion Correction |
| Keyword(5) | Breath-hold |
| 1st Author's Name | Masayuki KANAI |
| 1st Author's Affiliation | Graduate School of Engineering, Chiba University() |
| 2nd Author's Name | Hideaki HANEISHI |
| 2nd Author's Affiliation | Research Center for Frontier Medical Engineering, Chiba University |
| 3rd Author's Name | Kyouka KOBUNA |
| 3rd Author's Affiliation | Graduate School of Advanced Integration Science, Chiba University |
| 4th Author's Name | Hidenori UE |
| 4th Author's Affiliation | Fukushima National College of Technology |
| 5th Author's Name | Yoshitaka TAMAI |
| 5th Author's Affiliation | St. Hill Hospital |
| 6th Author's Name | Atsushi SAKOHIRA |
| 6th Author's Affiliation | St. Hill Hospital |
| 7th Author's Name | Kazuyoshi SUGA |
| 7th Author's Affiliation | St. Hill Hospital |
| Date | 2011-01-19 |
| Paper # | MI2010-86 |
| Volume (vol) | vol.110 |
| Number (no) | 364 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |