Stereotactic Positioning System: Towards a Mechanism Used in Thermal Ablation Therapy

In microwave thermal ablation, placing the antenna on a specific coordinate is one of the most critical steps. Several stereotactic systems can place an instrument on a specific point with great accuracy. However, these systems are developed for neurosurgery; moreover, a stereotactic system used in...

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Bibliographic Details
Published in:Applied sciences 2022-08, Vol.12 (15), p.7795
Main Authors: Mendez Maria, Jose, Lara Hernandez, Gemima, Trujillo-Romero, Citlalli Jessica, Martinez Sibaja, Albino, Flores Cuautle, Jose Jesus Agustín
Format: Article
Language:English
Subjects:
Ablation
Accuracy
Antennas
Bone cancer
Bones
Brain cancer
Cancer therapies
Chemotherapy
Cylindrical coordinates
Design
Displacement
Electromagnetism
electromechanical device
leg stereotactic systems
microwave antenna
Microwave antennas
Neurosurgery
Permeability
Polylactic acid
Radiation therapy
Stepping motors
Temperature
thermal ablation
Tumors
Ultrasonic imaging
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Summary:In microwave thermal ablation, placing the antenna on a specific coordinate is one of the most critical steps. Several stereotactic systems can place an instrument on a specific point with great accuracy. However, these systems are developed for neurosurgery; moreover, a stereotactic system used in microwave thermal ablation must not disturb the electromagnetic (EM) pattern generated by the antenna. A stereotactic positioning system was designed, built, and tested. Different types of materials were proposed to manufacture the proposed stereotactic system to locate the microwave antennas. The stereotactic system can displace the microwave antenna around the Z-axis and Theta-axis. Displacements were generated by stepper motors and controlled by the user through a graphical interface. The system tests consist of programming displacements along the two axes in steps of 5 mm on the Z-axis and 5 degrees on the Theta-axis. Results showed that the system is capable of moving using cylindrical coordinates over a 70 mm displacement with an average error of ±0.85 mm for sensors on the Z-axis, while in the Theta-axis it reaches 180∘ displacement with an error of ±2.64∘. A stereotactic microwave antenna positioning system was developed and preliminarily tested. This first system can already be used to evaluate antenna performance either in phantoms or ex-vivo tissue. Moreover, this system can be extrapolated to different parts of the human body and be adapted to the required dimensions.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12157795