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New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm

To improve the accuracy of calibration of C-arm, and overcome the space limitation in surgery, we proposed a new calibrator for online calibration of C-arm. After the image rectification by a polynomial fitting-based global correction method, the C-arm was assumed as an ideal pinhole model. The rela...

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Autores principales: Guo, Na, Yang, Biao, Wang, Yuhan, Liu, Hongsheng, Hu, Lei, Wang, Tianmiao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539996/
https://www.ncbi.nlm.nih.gov/pubmed/31035379
http://dx.doi.org/10.3390/s19091989
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author Guo, Na
Yang, Biao
Wang, Yuhan
Liu, Hongsheng
Hu, Lei
Wang, Tianmiao
author_facet Guo, Na
Yang, Biao
Wang, Yuhan
Liu, Hongsheng
Hu, Lei
Wang, Tianmiao
author_sort Guo, Na
collection PubMed
description To improve the accuracy of calibration of C-arm, and overcome the space limitation in surgery, we proposed a new calibrator for online calibration of C-arm. After the image rectification by a polynomial fitting-based global correction method, the C-arm was assumed as an ideal pinhole model. The relationships between two kinds of spatial calibration errors and the distribution of fiducial points were studied: the performance of FRE (Fiducial Registration Error) and TRE (Target Registration Error) were not consistent, but both were best at the 12 marked points; the TRE decreased with the increase of the uniformity of calibration points distribution, and with the decrease of the distance between the target point and the center of calibration points. A calibrator with 12 fiducial points conical helically distributed, which could be placed on the knee, was an attractive option. A total of 10 experiments on C-arm calibration accuracy were conducted and the mean value of mapping error was 0.41 mm. We designed an ACL reconstruction navigation system and carried out specimen experiments on 4 pairs of dry femur and tibia. The mean accuracy of navigation system was 0.85 mm, which is important to the tunnel positioning for ACL reconstruction.
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spelling pubmed-65399962019-06-04 New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm Guo, Na Yang, Biao Wang, Yuhan Liu, Hongsheng Hu, Lei Wang, Tianmiao Sensors (Basel) Article To improve the accuracy of calibration of C-arm, and overcome the space limitation in surgery, we proposed a new calibrator for online calibration of C-arm. After the image rectification by a polynomial fitting-based global correction method, the C-arm was assumed as an ideal pinhole model. The relationships between two kinds of spatial calibration errors and the distribution of fiducial points were studied: the performance of FRE (Fiducial Registration Error) and TRE (Target Registration Error) were not consistent, but both were best at the 12 marked points; the TRE decreased with the increase of the uniformity of calibration points distribution, and with the decrease of the distance between the target point and the center of calibration points. A calibrator with 12 fiducial points conical helically distributed, which could be placed on the knee, was an attractive option. A total of 10 experiments on C-arm calibration accuracy were conducted and the mean value of mapping error was 0.41 mm. We designed an ACL reconstruction navigation system and carried out specimen experiments on 4 pairs of dry femur and tibia. The mean accuracy of navigation system was 0.85 mm, which is important to the tunnel positioning for ACL reconstruction. MDPI 2019-04-28 /pmc/articles/PMC6539996/ /pubmed/31035379 http://dx.doi.org/10.3390/s19091989 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Guo, Na
Yang, Biao
Wang, Yuhan
Liu, Hongsheng
Hu, Lei
Wang, Tianmiao
New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title_full New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title_fullStr New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title_full_unstemmed New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title_short New Calibrator with Points Distributed Conical Helically for Online Calibration of C-Arm
title_sort new calibrator with points distributed conical helically for online calibration of c-arm
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6539996/
https://www.ncbi.nlm.nih.gov/pubmed/31035379
http://dx.doi.org/10.3390/s19091989
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