Related Experiment Video
Updated: Jun 12, 2026

Mechanical Mapping of Spheroids Using Brillouin Spectroscopy
Published on: December 12, 2025
Application of k-space energy spectrum analysis for inherent and dynamic B0 mapping and deblurring in spiral imaging
Trong-Kha Truong1, Nan-Kuei Chen, Allen W Song
1Brain Imaging and Analysis Center, Duke University, Durham, North Carolina, USA. truong@biac.duke.edu
Abstract:
Spiral imaging is vulnerable to spatial and temporal variations of the amplitude of the static magnetic field (B(0)) caused by susceptibility effects, eddy currents, chemical shifts, subject motion, physiological noise, and system instabilities, resulting in image blurring. Here, a novel off-resonance correction method is proposed to address these issues. A k-space energy spectrum analysis algorithm is first applied to inherently and dynamically generate a B(0) map from the k-space data at each time point, without requiring any additional data acquisition, pulse sequence modification, or phase unwrapping. A simulated phase evolution rewinding algorithm and an automatic residual deblurring algorithm are then used to correct for the blurring caused by both spatial and temporal B(0) variations, resulting in a high spatial and temporal fidelity. This method is validated against conventional B(0) mapping and deblurring methods, and its advantages for dynamic MRI applications are demonstrated in functional MRI studies.
Related Concept Videos
X-ray Imaging
Deconvolution
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
Real-World Applications of Space Curves
Imaging Biological Samples with Optical Microscopy
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Divergence and Curl of Magnetic Field
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...

