cardiac triggering
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Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 470 ◽  
Author(s):  
Jan Nedoma ◽  
Marcel Fajkus ◽  
Radek Martinek ◽  
Homer Nazeran

This article presents a solution for continuous monitoring of both respiratory rate (RR) and heart rate (HR) inside Magnetic Resonance Imaging (MRI) environments by a novel ballistocardiography (BCG) fiber-optic sensor. We designed and created a sensor based on the Fiber Bragg Grating (FBG) probe encapsulated inside fiberglass (fiberglass is a composite material made up of glass fiber, fabric, and cured synthetic resin). Due to this, the encapsulation sensor is characterized by very small dimensions (30 × 10 × 0.8 mm) and low weight (2 g). We present original results of real MRI measurements (conventionally most used 1.5 T MR scanner) involving ten volunteers (six men and four women) by performing conventional electrocardiography (ECG) to measure the HR and using a Pneumatic Respiratory Transducer (PRT) for RR monitoring. The acquired sensor data were compared against real measurements using the objective Bland–Altman method, and the functionality of the sensor was validated (95.36% of the sensed values were within the ±1.96 SD range for the RR determination and 95.13% of the values were within the ±1.96 SD range for the HR determination) by this means. The accuracy of this sensor was further characterized by a relative error below 5% (4.64% for RR and 4.87% for HR measurements). The tests carried out in an MRI environment demonstrated that the presence of the FBG sensor in the MRI scanner does not affect the quality of this imaging modality. The results also confirmed the possibility of using the sensor for cardiac triggering at 1.5 T (for synchronization and gating of cardiovascular magnetic resonance) and for cardiac triggering when a Diffusion Weighted Imaging (DWI) is used.


2017 ◽  
Vol 27 (4) ◽  
pp. 310-317 ◽  
Author(s):  
Åsa Carlsson ◽  
Maja C. Sohlin ◽  
Kerstin M. Lagerstrand ◽  
Eva Forsell Aronsson ◽  
Maria Ljungberg

2014 ◽  
Vol 74 (5) ◽  
pp. 1257-1265 ◽  
Author(s):  
Fabian Kording ◽  
Bjoern Schoennagel ◽  
Gunnar Lund ◽  
Friedrich Ueberle ◽  
Caroline Jung ◽  
...  

2011 ◽  
Vol 41 (12) ◽  
pp. 1536-1544 ◽  
Author(s):  
Shreyas S. Vasanawala ◽  
Frandics P. Chan ◽  
Beverley Newman ◽  
Marcus T. Alley

Author(s):  
Tobias Frauenrath ◽  
Fabian Hezel ◽  
Wolfgang Renz ◽  
Thibaut de Geyer d'Orth ◽  
Matthias Dieringer ◽  
...  

2010 ◽  
Vol 21 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Jin Yamamura ◽  
Michael Frisch ◽  
Hannes Ecker ◽  
Joachim Graessner ◽  
Kurt Hecher ◽  
...  

2009 ◽  
Vol 34 (S1) ◽  
pp. 27-27
Author(s):  
U. Wedegärtner ◽  
J. Yamamura ◽  
M. Frisch ◽  
G. Adam ◽  
W. Diehl ◽  
...  

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