A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study
This paper presents, for the first time, a rotary actuator functionalized by an inclined disc rotor that serves as a distal optical scanner for endoscopic probes, enabling side-viewing endoscopy in luminal organs using different imaging/analytic modalities such as optical coherence tomography and Ra...
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| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/1/111 |
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| author | Nirvana Gharib Mohammad Reza Yousefi Darestani Kenichi Takahata |
| author_facet | Nirvana Gharib Mohammad Reza Yousefi Darestani Kenichi Takahata |
| author_sort | Nirvana Gharib |
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| description | This paper presents, for the first time, a rotary actuator functionalized by an inclined disc rotor that serves as a distal optical scanner for endoscopic probes, enabling side-viewing endoscopy in luminal organs using different imaging/analytic modalities such as optical coherence tomography and Raman spectroscopy. This scanner uses a magnetic rotor designed to have a mirror surface on its backside, being electromagnetically driven to roll around the cone-shaped hollow base to create a motion just like a precessing coin. An optical probing beam directed from the probe’s optic fiber is passed through the hollow cone to be incident and bent on the back mirror of the rotating inclined rotor, circulating the probing beam around the scanner for full 360° sideway imaging. This new scanner architecture removes the need for a separate prism mirror and holding mechanics to drastically simplify the scanner design and thus, potentially enhancing device miniaturization and reliability. The first proof-of-concept is developed using 3D printing and experimentally analyzed to reveal the ability of both angular stepping at 45° and high-speed rotation up to 1500 rpm within the biologically safe temperature range, a key function for multimodal imaging. Preliminary optical testing demonstrates continuous circumferential scanning of the laser beam with no blind spot caused by power leads to the actuator. The results indicate the fundamental feasibility of the developed actuator as an endoscopic distal scanner, a significant step to further development toward advancing optical endoscope technology. |
| format | Article |
| id | doaj-art-1243d900315e4a47b6235024a7083b90 |
| institution | Kabale University |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-1243d900315e4a47b6235024a7083b902025-01-24T13:42:13ZengMDPI AGMicromachines2072-666X2025-01-0116111110.3390/mi16010111A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept StudyNirvana Gharib0Mohammad Reza Yousefi Darestani1Kenichi Takahata2Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaSchool of Biomedical Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, CanadaDepartment of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, CanadaThis paper presents, for the first time, a rotary actuator functionalized by an inclined disc rotor that serves as a distal optical scanner for endoscopic probes, enabling side-viewing endoscopy in luminal organs using different imaging/analytic modalities such as optical coherence tomography and Raman spectroscopy. This scanner uses a magnetic rotor designed to have a mirror surface on its backside, being electromagnetically driven to roll around the cone-shaped hollow base to create a motion just like a precessing coin. An optical probing beam directed from the probe’s optic fiber is passed through the hollow cone to be incident and bent on the back mirror of the rotating inclined rotor, circulating the probing beam around the scanner for full 360° sideway imaging. This new scanner architecture removes the need for a separate prism mirror and holding mechanics to drastically simplify the scanner design and thus, potentially enhancing device miniaturization and reliability. The first proof-of-concept is developed using 3D printing and experimentally analyzed to reveal the ability of both angular stepping at 45° and high-speed rotation up to 1500 rpm within the biologically safe temperature range, a key function for multimodal imaging. Preliminary optical testing demonstrates continuous circumferential scanning of the laser beam with no blind spot caused by power leads to the actuator. The results indicate the fundamental feasibility of the developed actuator as an endoscopic distal scanner, a significant step to further development toward advancing optical endoscope technology.https://www.mdpi.com/2072-666X/16/1/111optical scannerelectromagnetic actuatorprecessional rotationmedical imagingoptical coherence tomographyRaman spectroscopy |
| spellingShingle | Nirvana Gharib Mohammad Reza Yousefi Darestani Kenichi Takahata A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study Micromachines optical scanner electromagnetic actuator precessional rotation medical imaging optical coherence tomography Raman spectroscopy |
| title | A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study |
| title_full | A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study |
| title_fullStr | A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study |
| title_full_unstemmed | A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study |
| title_short | A Precessing-Coin-like Rotary Actuator for Distal Endoscope Scanners: Proof-of-Concept Study |
| title_sort | precessing coin like rotary actuator for distal endoscope scanners proof of concept study |
| topic | optical scanner electromagnetic actuator precessional rotation medical imaging optical coherence tomography Raman spectroscopy |
| url | https://www.mdpi.com/2072-666X/16/1/111 |
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