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An acquisition feedback system for nuclear magnetic resonance (NMR) is a control mechanism that uses real-time data and feedback loops to optimize the NMR experiment. This system adaptively adjusts parameters like pulse sequences and timing (e.g., excitation and acquisition times) to improve efficiency, maximize signal strength, and minimize noise and invalid data, adapting to the specific characteristics of the sample. Key components include hardware for generating pulses and receiving signals, software for control and analysis, and feedback algorithms that make automatic adjustments.
Functionality
- Adaptive control: The system can automatically adjust parameters in real time, unlike static, pre-programmed sequences.
- Parameter optimization: It can set appropriate pulse sequences and parameters (like NE and TE) based on the sample's relaxation characteristics.
- Signal maximization: Feedback control can be used to maximize the signal amplitude, which increases the probability of correct detection.
- Noise reduction: By using feedback algorithms, the system can help reduce the probability of false alarms, in addition to standard methods like signal averaging.
Components and techniques
- Pulse sequences: The system uses a combination of techniques for spectral encoding, spatial encoding, and excitation.
- Real-time measurement: It allows for real-time measurement by adaptively regulating the pulse sequence.
- Hardware control: It communicates with the NMR spectrometer hardware, including the pulse programmer and magnet power supply, via software modules.
- Feedback algorithms: These algorithms analyze incoming data to inform the hardware on how to adjust parameters for the next acquisition cycle.
- Data processing: The system can perform processing like Fourier transforms and can be integrated with other programs for tasks such as data analysis, modeling, and plotting.
Applications
- Efficiency improvement: It helps overcome issues like RF amplifier overheating and invalid data acquisition caused by long experiments with high power consumption.
- Dynamic measurements: It is especially useful for dynamic measurements and situations where the sample characteristics might change.
- Improved detection: It can enhance the performance of detection systems, for example, in applications like detecting explosives.
- Accessibility: Systems like the NMRduino simplify instrument setup and data acquisition, making NMR more accessible for research and education.
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Scholarly articles for acquisition feedback system for nuclear magnetic resonance | |
… multi‐nuclear magnetic resonance in vivo. Review of … - Lopez Kolkovsky - Cited by 36 Magnetic resonance basics, magnetic fields, nuclear … - Bushberg - Cited by 12 Acquisition of a nuclear magnetic resonance signal … - Prance - Cited by 42 | |
acquisition feedback system for nuclear magnetic resonance ...
CIQTEK
https://www.ciqtekglobal.com › acquisition-feedback-sy...
CIQTEK
https://www.ciqtekglobal.com › acquisition-feedback-sy...
CIQTEK is the leading manufacturer of acquisition feedback system for nuclear magnetic resonance, global product supply, and free consultation.
Acquisition of a nuclear magnetic resonance signal using an ...
AIP.ORG
https://pubs.aip.org › aip › apl › article › Acquisition-of...
AIP.ORG
https://pubs.aip.org › aip › apl › article › Acquisition-of...
Jul 25, 2007 — The authors describe an alternative approach to signal acquisition in nuclear magnetic resonance and demonstrate this by measuring the free ...
Acquisition strategies for spatially resolved magnetic ...
National Institutes of Health (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC7109201
National Institutes of Health (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC7109201
by GJ Topping2019Cited by 33 — Hyperpolarization is an emerging method in magnetic resonance imaging that allows nuclear spin polarization of gases or liquids to be temporarily enhanced ...
Signal feedback applications in low-field NMR and MRI
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by VV Kuzmin2020Cited by 6 — Signal feedback can be used to actively control these currents and adjust the detection bandwidth without resistive losses.
Adaptive control for downhole nuclear magnetic resonance ...
Nature
https://www.nature.com › scientific reports › articles
Nature
https://www.nature.com › scientific reports › articles
by G Shi2023 — In order to achieve the purpose of real-time data acquisition and feedback control, a high-speed data acquisition and processing chip and ...
Fast Acquisition of High-Quality Nuclear Magnetic Resonance ...
ACS Publications
https://pubs.acs.org › doi
ACS Publications
https://pubs.acs.org › doi
Feb 28, 2022 — In addition, PS-ResNet can also suppress noise and restore the peak shape. It means that PS-ResNet provides a new method for fast acquisition ...
Digital Nuclear Magnetic Resonance Acquisition Channel
IEEE Xplore
https://ieeexplore.ieee.org › document
IEEE Xplore
https://ieeexplore.ieee.org › document
by P Baldrighi2008Cited by 2 — The proposed system replaces as much analog electronics as possible with digital electronics. The receiver can detect NMR signals in a frequency range of 0.5–90 ...
Free induction decay acquisition in NMR
Chemistry Stack Exchange
https://chemistry.stackexchange.com › questions › free-...
Chemistry Stack Exchange
https://chemistry.stackexchange.com › questions › free-...
Feb 11, 2022 — Both FID from the two receivers should appear like a free induction curve since are both real experimental values.
1 answer · Top answer: (1) What is the criterion of calling one signal as real and the other imaginary from the two orthogonal coils Assuming that you have detection axes ...
The acquisition of multidimensional NMR spectra within a ...
PNAS
https://www.pnas.org › doi › pnas.252644399
PNAS
https://www.pnas.org › doi › pnas.252644399
by L Frydman2002Cited by 645 — A scheme enabling the complete sampling of multidimensional NMR domains within a single continuous acquisition is introduced and exemplified.
do-it-yourself nuclear magnetic resonance spectroscopy
Sciencemadness
http://www.sciencemadness.org › talk › viewthread
Sciencemadness
http://www.sciencemadness.org › talk › viewthread
Sep 29, 2010 — For the excitation coil you gate the power amp on for some number of cycles of the excitation frequency, the pulse is a number of cycles long.