Monitoring of thermal treatment by linearly chirped fiber Bragg grating sensors: Feasibility assessment during laser ablation on ex vivo liver

2016 ◽  
Author(s):  
F. Napoleoni ◽  
M. Caponera ◽  
A. Polimadei ◽  
D. Tosi ◽  
P. Saccomandi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Thermal Treatment ◽  
Fiber Bragg Grating ◽  
Ex Vivo ◽  
Bragg Grating ◽  
Feasibility Assessment ◽  
Fiber Bragg Grating Sensors ◽  
Chirped Fiber Bragg Grating

scholarly journals Fiber Bragg Grating Sensors for Millimetric-Scale Temperature Monitoring of Cardiac Tissue Undergoing Radiofrequency Ablation: A Feasibility Assessment

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6490
Author(s):  
Martina Zaltieri ◽  
Greta Allegretti ◽  
Carlo Massaroni ◽  
Emiliano Schena ◽  
Filippo Maria Cauti
Keyword(s):  
Radiofrequency Ablation ◽  
Temperature Distribution ◽  
Fiber Bragg Grating ◽  
Treatment Time ◽  
Ex Vivo ◽  
Single Point ◽  
Temperature Measurements ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Scale Temperature

Radiofrequency ablation (RFA) is the most widely used technique for the treatment of cardiac arrhythmias. A variety of factors, such as the electrode tip shape, the force exerted on the tissue by the catheter and the delivered power, combine to determine the temperature distribution, and as consequence, the lesion shape and size. In this context, being able to know the temperature reached in the myocardium during the RFA can be helpful for predicting the lesion dimensions to prevent the occurrence of undesired tissue damage. The catheters used so far in such procedures provide single-point temperature measurements within the probe (by means of embedded thermocouples or thermistors), so no information regarding the temperature changes occurring in myocardial tissues can be retrieved. The aim of this study was to assess the feasibility of fiber Bragg grating sensors (FBGs) to perform multi-point and millimetric-scale temperature measurements within myocardium subjected to RFA. The assessment has been performed on ex vivo porcine myocardium specimens undergoing RFA. Data show the feasibility of the proposed solution in providing spatial temperature distribution within the myocardial tissue during the entire RFA. These high-resolved measurements may allow reconstructing the temperature distribution in the tissue. This study lays the foundations for the implementation of 3D thermal maps to investigate how the supplied power, treatment time, force of contact and irrigation flow of the catheter influence the thermal effects within the tissue.

Real-time temperature monitoring during radiofrequency treatments on ex-vivo animal model by fiber Bragg grating sensors

2017 ◽  
Author(s):  
Giovanna Palumbo ◽  
Daniele Tosi ◽  
Emiliano Schena ◽  
Carlo Massaroni ◽  
Juliet Ippolito ◽  
...  
Keyword(s):  
Animal Model ◽  
Fiber Bragg Grating ◽  
Real Time ◽  
Ex Vivo ◽  
Temperature Monitoring ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

scholarly journals Shallow-Tapered Chirped Fiber Bragg Grating Sensors for Dual Refractive Index and Temperature Sensing

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3635
Author(s):  
Takhmina Ayupova ◽  
Madina Shaimerdenova ◽  
Daniele Tosi
Keyword(s):  
Refractive Index ◽  
Spectral Analysis ◽  
Fiber Bragg Grating ◽  
Thermal Characteristics ◽  
Temperature Sensing ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Thermal Changes ◽  
Chirped Fiber Bragg Grating

In this work, we present a gold-coated shallow-tapered chirped fiber Bragg grating (stCFBG) for dual refractive index (RI) and temperature sensing. The stCFBG has been fabricated on a 15-mm long chirped FBG, by tapering a 7.29-mm region with a waist of 39 μm. The spectral analysis shows two distinct regions: a pre-taper region, in which the stCFBG is RI-independent and can be used to detect thermal changes, and a post-taper region, in which the reflectivity increases significantly when the RI increments. We estimate the RI and thermal sensitivities as 382.83 dB/RIU and 9.893 pm/°C, respectively. The cross-talk values are low (−1.54 × 10−3 dB/°C and 568.1 pm/RIU), which allows an almost ideal separation between RI and thermal characteristics. The stCFBG is a compact probe, suitable for long-term and temperature-compensated biosensing and detection of chemical analytes.

Real-Time Temperature Monitoring in Liver During Magnetite Nanoparticle-Enhanced Microwave Ablation With Fiber Bragg Grating Sensors: Ex Vivo Analysis

2018 ◽  
Vol 18 (19) ◽  
pp. 8005-8011 ◽  
Author(s):  
Madina Jelbuldina ◽  
Alina Korobeinyk ◽  
Sanzhar Korganbayev ◽  
Daniele Tosi ◽  
Kanat Dukenbayev ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Microwave Ablation ◽  
Ex Vivo ◽  
Temperature Monitoring ◽  
Bragg Grating ◽  
Magnetite Nanoparticle ◽  
Fiber Bragg Grating Sensors

Design and Feasibility Assessment of a Magnetic Resonance-Compatible Smart Textile Based on Fiber Bragg Grating Sensors for Respiratory Monitoring

2016 ◽  
Vol 16 (22) ◽  
pp. 8103-8110 ◽  
Author(s):  
Carlo Massaroni ◽  
Paola Saccomandi ◽  
Domenico Formica ◽  
Daniela Lo Presti ◽  
Michele Arturo Caponero ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Fiber Bragg Grating ◽  
Respiratory Monitoring ◽  
Bragg Grating ◽  
Feasibility Assessment ◽  
Fiber Bragg Grating Sensors ◽  
Smart Textile
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