Modeling and Simulation of On-Chip Probe for Portable NMR Applications

Gupta, Manish; Safvan, C. P.; Singh, Kundan; Lobiyal, D. K.

doi:10.23919/piers.2018.8597770

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…It is like an oscillatory tank circuit having inductance and capacitance in parallel (Hoult & Richards, 1976; McCready et al., 1987). Matching circuit is helpful to match the impedance of the coil to the impedance of the receiver and also maximize power transfer from the pre‐amplifier to the coil (Gupta, Safvan, et al, 2018). The tuning circuit is used for offsetting the inductor and tuning the coil to the resonant frequency.…”

Section: Resultsmentioning

confidence: 99%

“…Here, we use direct expressions of tuning and matching capacitors (TMCs) derived in our recent detailed study (Gupta, Safvan, et al, 2018). Therefore, the derived expression for tuning capacitor (

C_{T}

) is given by.

C_{T} = \frac{L}{()(, 4 π^{2} f^{2} L^{2} + R^{2})}

where

f

is the resonant frequency of the probe.…”

Section: Resultsmentioning

confidence: 99%

“…NMR probe is a resonant tank circuit tuned with tuning capacitors that are adjusted to match the NMR resonance frequency using matching capacitors (Ali et al., 2017; Gupta, Safvan, Singh, & Lobiyal, 2018; Mispelter et al., 2015). During probe construction, we have to take into consideration optimal sensitivity and resolution along with proper selection of coil geometry, minimizing circuit losses, and generated static field homogeneity.…”

Section: Resultsmentioning

confidence: 99%

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A sensitive on‐chip probe–based portable nuclear magnetic resonance for detecting low parasitaemia plasmodium falciparum in human blood

et al. 2020

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Malaria elimination programmes are dependent on a rapid, cost‐effective and portable diagnostic tool to detect and quantify malaria parasites in human blood. Herein, we report a cost‐effective and portable nuclear magnetic resonance (pNMR) for malaria diagnosis. In this present study, we have developed and characterized a sensitive and low‐cost novel on‐chip NMR probe. This NMR probe has improved mismatching problem between radiofrequency (RF) coil and transmission line that results in enhancement in NMR sensitivity. Developed pNMR represents a rapid, cost‐effective and highly sensitive method to detect very low parasitaemia plasmodium falciparum (0.0001%) in infected human blood in comparison with other available malaria diagnosis techniques. The experimental results show that very low parasitic load can be detected rapidly by the change in the transverse relaxation rate (T2) of NMR, suggesting a good sensitivity. A good linear relationship with a correlation coefficient of 0.94 between the change in transverse relaxation rate (ΔT2) and the different parasitaemia (%) has been observed, indicating that pNMR is a potential tool for real‐time, reusable and high‐sensitivity analysis of malaria parasite in human blood.

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Section: Resultsmentioning

confidence: 99%

C_{T}

) is given by.

C_{T} = \frac{L}{()(, 4 π^{2} f^{2} L^{2} + R^{2})}

where

f

is the resonant frequency of the probe.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A sensitive on‐chip probe–based portable nuclear magnetic resonance for detecting low parasitaemia plasmodium falciparum in human blood

et al. 2020

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“…References [9]- [19] solve interesting problems, similar to the problems solved in this article. The processing of the measured data is discussed elsewhere [20].…”

Section: Introductionmentioning

confidence: 90%

Sensitivity Analysis of the Simply Noise-matched Receiving Coil for NMR Experiments

Andris

Frollo

2020

Measurement Science Review

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The article analyzes the sensitivity of unmatched receiving coil for the NMR scanner. Receiver of the scanner was investigated from the point of view of noise features. Theory of the noise figure has been modified to utilize the receiver for digitization of its own noise and the noise figure calculation. The resulting noise figure has been measured with different source impedances and the optimal value has been acquired. Influence of the noise figure on the resulting signal-to-noise ratio has been calculated for the sensitivity judgement. The output SNR has been investigated for constant input SNR as well as for constant input voltage. Many results are depicted in figures. Also examples of theoretical results are depicted graphically.

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A Flexible Rectangular PCB Coil to Excite Uniform Magnetic Field in Nuclear Magnetic Resonance Spectroscopy: Design, Optimization and Implementation

Noohi,

Faraji Baghtash,

Badri Ghavifekr

2024

Sens Imaging

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Modeling and Simulation of On-Chip Probe for Portable NMR Applications

Cited by 4 publications

References 9 publications

A sensitive on‐chip probe–based portable nuclear magnetic resonance for detecting low parasitaemia plasmodium falciparum in human blood

A sensitive on‐chip probe–based portable nuclear magnetic resonance for detecting low parasitaemia plasmodium falciparum in human blood

Sensitivity Analysis of the Simply Noise-matched Receiving Coil for NMR Experiments

A Flexible Rectangular PCB Coil to Excite Uniform Magnetic Field in Nuclear Magnetic Resonance Spectroscopy: Design, Optimization and Implementation

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