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Calibration alignment sensitivity in corneal terahertz imaging
dc.contributor.author | Zarrinkhat, Faezeh |
dc.contributor.author | Baggio, Mariangela |
dc.contributor.author | Lamberg, Joel |
dc.contributor.author | Tamminen, Aleksi |
dc.contributor.author | Nefedova, Irina |
dc.contributor.author | Ala-Laurinaho, Juha |
dc.contributor.author | Khaled, Elsayed E. M. |
dc.contributor.author | Rius Casals, Juan Manuel |
dc.contributor.author | Romeu Robert, Jordi |
dc.contributor.author | Taylor, Zachary |
dc.contributor.other | Universitat Politècnica de Catalunya. Doctorat en Teoria del Senyal i Comunicacions |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.date.accessioned | 2022-06-09T09:12:55Z |
dc.date.available | 2022-06-09T09:12:55Z |
dc.date.issued | 2022-04-22 |
dc.identifier.citation | Zarrinkhat, F. [et al.]. Calibration alignment sensitivity in corneal terahertz imaging. "Sensors (Switzerland)", 22 Abril 2022, vol. 22, núm. 9, p. 3237:1-3237:10. |
dc.identifier.issn | 1424-8220 |
dc.identifier.uri | http://hdl.handle.net/2117/368200 |
dc.description.abstract | Improving the longitudinal modes coupling in layered spherical structure contributes significantly to corneal terahertz sensing, which plays a crucial role in the early diagnosis of cornea dystrophies. Using a steel sphere to calibrate reflection from the cornea sample assists in enhancing the resolution of longitudinal modes. The requirement and challenges toward applying the calibration sphere are introduced and addressed. Six corneas with different properties are spotted to study the effect of perturbations in the calibration sphere in a frequency range from 100 GHz to 600 GHz. A particle-swarm optimization algorithm is employed to quantify corneal characteristics considering cases of accurately calibrated and perturbed calibrated scenarios. For the first case, the study is carried out with signal-to-noise values of 40 dB, 50 dB and 60 dB at waveguide bands WR-5.1, WR-3.4, and WR-2.2. As expected, better estimation is achieved in high-SNR cases. Furthermore, the lower waveguide band is revealed as the most proper band for the assessment of corneal features. For perturbed cases, the analysis is continued for the noise level of 60 dB in the three waveguide bands. Consequently, the error in the estimation of corneal properties rises significantly (around 30%). |
dc.description.sponsorship | This research was funded by the Agencia Estatal de Investigación PID2019-107885GB-C31/AEI/10.13039, PRE2018-084326, and Academy of Finland Project number 327640. |
dc.language.iso | eng |
dc.publisher | Multidisciplinary Digital Publishing Institute (MDPI) |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria de la telecomunicació |
dc.subject.lcsh | Cornea |
dc.subject.lcsh | Swarm intelligence |
dc.subject.other | Cornea |
dc.subject.other | Particle-swarm optimization |
dc.subject.other | Terahertz |
dc.title | Calibration alignment sensitivity in corneal terahertz imaging |
dc.type | Article |
dc.subject.lemac | Còrnia |
dc.subject.lemac | Intel·ligència col·lectiva |
dc.contributor.group | Universitat Politècnica de Catalunya. ANTENNALAB - Grup d'Antenes i Sistemes Radio |
dc.identifier.doi | 10.3390/s22093237 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://www.mdpi.com/1424-8220/22/9/3237 |
dc.rights.access | Open Access |
local.identifier.drac | 33100642 |
dc.description.version | Postprint (author's final draft) |
dc.relation.projectid | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107885GB-C31/ES/SISTEMAS RADIANTES X-WAVE INTEGRADAS DE COMUNICACIONES Y SENSORIZACION/ |
local.citation.author | Zarrinkhat, F.; Baggio, M.; Lamberg, J.; Tamminen, A.; Nefedova, I.; Ala-Laurinaho, J.; Khaled, E.; Rius, J.; Romeu, J.; Taylor, Z. |
local.citation.publicationName | Sensors (Switzerland) |
local.citation.volume | 22 |
local.citation.number | 9 |
local.citation.startingPage | 3237:1 |
local.citation.endingPage | 3237:10 |
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