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Related Experiment Video

Updated: Jun 5, 2026

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

Noise reduction by dynamic signal preemphasis.

Kazuyuki Takeda¹, K Takegoshi

¹Division of Chemistry, Graduate School of Science, Kyoto University, 606-8502 Kyoto, Japan. takezo@kuchem.kyoto-u.ac.jp

Journal of Magnetic Resonance (San Diego, Calif. : 1997)

|December 24, 2010

Summary

This summary is machine-generated.

This study introduces APRICOT, a novel method to reduce digitization noise in NMR receivers by increasing receiver gain and applying post-acquisition apodization. This technique enhances the detection of weak signals, improving NMR data quality.

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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

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Last Updated: Jun 5, 2026

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Area of Science:

Nuclear Magnetic Resonance (NMR) Spectroscopy
Digital Signal Processing
Solid-State Physics

Background:

Digitization noise in analog-to-digital converters (ADCs) limits sensitivity in NMR receivers.
Dynamic range and bit depth of ADCs are critical for accurately capturing NMR signals.
Weak signals are often obscured by noise, hindering detailed analysis.

Purpose of the Study:

To develop a method for reducing digitization noise in NMR receivers.
To enhance the detection of weak NMR signals within a limited dynamic range.
To improve the overall quality and information content of NMR data.

Main Methods:

A novel approach named APRICOT (APodization after Receiver gain InCrement during Ongoing sequence with Time) was developed.
The method involves dynamically increasing receiver gain during signal acquisition.
Post-acquisition data processing includes apodization to compensate for the applied preemphasis.

Main Results:

APRICOT effectively reduces digitization noise by maximizing the utilization of the ADC's bit depth.
The method successfully revealed exceedingly small peaks previously buried in noise.
Demonstrated efficacy in a solid-state system with a pair of 13C spins.

Conclusions:

APRICOT significantly improves NMR sensitivity and the ability to detect low-intensity signals.
This technique offers a valuable tool for enhancing NMR data acquisition and analysis.
The method is particularly beneficial for studies involving weak signals or limited dynamic range.