Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization
The traveled distance and orientation of capsule endoscopes for each video frame are not available in commercial systems, but they would be highly relevant for physicians. Furthermore, scientific approaches lack precisely tracking the capsules along curved trajectories within the typical gastrointes...
| Main Authors: | , , , , , |
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Diagnostics |
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| Online Access: | https://www.mdpi.com/2075-4418/12/6/1333 |
| _version_ | 1797488303258206208 |
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| author | Samuel Zeising Lu Chen Angelika Thalmayer Maximilian Lübke Georg Fischer Jens Kirchner |
| author_facet | Samuel Zeising Lu Chen Angelika Thalmayer Maximilian Lübke Georg Fischer Jens Kirchner |
| author_sort | Samuel Zeising |
| collection | DOAJ |
| description | The traveled distance and orientation of capsule endoscopes for each video frame are not available in commercial systems, but they would be highly relevant for physicians. Furthermore, scientific approaches lack precisely tracking the capsules along curved trajectories within the typical gastrointestinal tract. Recently, we showed that the differential static magnetic localisation method is suitable for the precise absolute localisation of permanent magnets assumed to be integrated into capsule endoscopes. Thus, in the present study, the differential method was employed to track permanent magnets in terms of traveled distance and orientation along a length trajectory of 487.5 mm, representing a model of the winding gastrointestinal tract. Permanent magnets with a diameter of 10 mm and different lengths were used to find a lower boundary for magnet size. Results reveal that the mean relative distance and orientation errors did not exceed 4.3 ± 3.3%, and 2 ± 0.6<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>, respectively, when the magnet length was at least 5 mm. Thus, a 5 mm long magnet would be a good compromise between achievable tracking accuracy and magnet volume, which are essential for integration into small commercial capsules. Overall, the proposed tracking accuracy was better than that of the state of the art within a region covering the typical gastrointestinal-tract size. |
| first_indexed | 2024-03-10T00:01:07Z |
| format | Article |
| id | doaj.art-3ac3f4f4f8b94b1683bda49e29c0d86b |
| institution | Directory Open Access Journal |
| issn | 2075-4418 |
| language | English |
| last_indexed | 2024-03-10T00:01:07Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj.art-3ac3f4f4f8b94b1683bda49e29c0d86b2023-11-23T16:16:25ZengMDPI AGDiagnostics2075-44182022-05-01126133310.3390/diagnostics12061333Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic LocalizationSamuel Zeising0Lu Chen1Angelika Thalmayer2Maximilian Lübke3Georg Fischer4Jens Kirchner5Institute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyInstitute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyInstitute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyInstitute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyInstitute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyInstitute for Electronics Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 9, 91058 Erlangen, GermanyThe traveled distance and orientation of capsule endoscopes for each video frame are not available in commercial systems, but they would be highly relevant for physicians. Furthermore, scientific approaches lack precisely tracking the capsules along curved trajectories within the typical gastrointestinal tract. Recently, we showed that the differential static magnetic localisation method is suitable for the precise absolute localisation of permanent magnets assumed to be integrated into capsule endoscopes. Thus, in the present study, the differential method was employed to track permanent magnets in terms of traveled distance and orientation along a length trajectory of 487.5 mm, representing a model of the winding gastrointestinal tract. Permanent magnets with a diameter of 10 mm and different lengths were used to find a lower boundary for magnet size. Results reveal that the mean relative distance and orientation errors did not exceed 4.3 ± 3.3%, and 2 ± 0.6<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>∘</mo></msup></semantics></math></inline-formula>, respectively, when the magnet length was at least 5 mm. Thus, a 5 mm long magnet would be a good compromise between achievable tracking accuracy and magnet volume, which are essential for integration into small commercial capsules. Overall, the proposed tracking accuracy was better than that of the state of the art within a region covering the typical gastrointestinal-tract size.https://www.mdpi.com/2075-4418/12/6/1333static magnetic localisationtrajectory trackingtraveled distancewireless capsule endoscopy |
| spellingShingle | Samuel Zeising Lu Chen Angelika Thalmayer Maximilian Lübke Georg Fischer Jens Kirchner Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization Diagnostics static magnetic localisation trajectory tracking traveled distance wireless capsule endoscopy |
| title | Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization |
| title_full | Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization |
| title_fullStr | Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization |
| title_full_unstemmed | Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization |
| title_short | Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization |
| title_sort | tracking the traveled distance of capsule endoscopes along a gastrointestinal tract model using differential static magnetic localization |
| topic | static magnetic localisation trajectory tracking traveled distance wireless capsule endoscopy |
| url | https://www.mdpi.com/2075-4418/12/6/1333 |
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