| Presentation | 1995/9/29 Head-Positioning System Using PSD Cameras and a 5-Degree-of Freedom Robotized Chair : Reproducibility of the Position and Orientation of the Patient's Head Yasuo NAKAMURA, Toyohiko HAYASHI, Takashi TAKEDA, Kazumasa KATOH, Michio MIYAKAWA, Masanori ITOH, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In measurements of mandibular movements employing a X-ray television, the orientation of the patient' s head must be normalized, relative to the measuring device, using a positioning jig. This normalization, however, is somewhat time-consuming and likely to restrict mandibular movements. To avoid these, we developed a system automatically normalizing the head position. This system monitors the position and orientation of the head, using a PSD camera photostereometry. If they are incorrect, the head is moved into the required position, using a 5-degree-of-freedom robotized chair. The determined position, however, has a certain margin of error, due to the mobility of the head relative to the head rest of the chair. To improve this, we employed an iterative method, where the positioning is repeated by reexamining the positional relation of the head and the head rest, until the determined position converges. This iterative positioning was proved to be valid for the reduction of the errors through experiments. The overall positional and orientative errors were verified to lie within 2.42 mm and 1.28 degrees, respectively, if the iteration converges. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | automatic head-positioning system / PSD camera / 5-degree-of-freedom robotized chair / accuracy verification / X-ray television |
| Paper # | MBE95-64 |
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| Conference Information | |
| Committee | MBE |
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| Conference Date | 1995/9/29(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | ME and Bio Cybernetics (MBE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Head-Positioning System Using PSD Cameras and a 5-Degree-of Freedom Robotized Chair : Reproducibility of the Position and Orientation of the Patient's Head |
| Sub Title (in English) | |
| Keyword(1) | automatic head-positioning system |
| Keyword(2) | PSD camera |
| Keyword(3) | 5-degree-of-freedom robotized chair |
| Keyword(4) | accuracy verification |
| Keyword(5) | X-ray television |
| 1st Author's Name | Yasuo NAKAMURA |
| 1st Author's Affiliation | Graduate School of Science and Technology, Niigata University() |
| 2nd Author's Name | Toyohiko HAYASHI |
| 2nd Author's Affiliation | Graduate School of Science and Technology, Niigata University |
| 3rd Author's Name | Takashi TAKEDA |
| 3rd Author's Affiliation | Department of Information Engineering, Faculty of Engineering, Niigata University |
| 4th Author's Name | Kazumasa KATOH |
| 4th Author's Affiliation | First Department of Prosthetic Dentistry, School of Dentistry, Niigata University |
| 5th Author's Name | Michio MIYAKAWA |
| 5th Author's Affiliation | Department of Information Engineering, Faculty of Engineering, Niigata University |
| 6th Author's Name | Masanori ITOH |
| 6th Author's Affiliation | Niigata Heavy Engineering Inc. |
| Date | 1995/9/29 |
| Paper # | MBE95-64 |
| Volume (vol) | vol.95 |
| Number (no) | 285 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |