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Ripening Study Based on Multi-Structural Inversion of Cherry Tomato qMRI.

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  • 1College of Information Science & Technology, Hebei Agricultural University, Baoding 071001, China.

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This study uses low-field MRI to track moisture changes in cherry tomatoes during ripening. It reveals consistent patterns in water mobility and content across fruit structures, aiding in ripening assessment.

Keywords:
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Area of Science:

  • Biophysics
  • Food Science
  • Medical Imaging

Background:

  • Assessing fruit ripening non-destructively is crucial for quality control.
  • Low-field MRI offers potential for quantitative moisture analysis but faces signal-to-noise challenges.

Purpose of the Study:

  • To develop and validate a non-destructive, quantitative low-field MRI method for assessing moisture mobility and content distribution in cherry tomatoes during ripening.
  • To analyze water dynamics across different fruit tissues throughout the ripening process.

Main Methods:

  • Implemented a 3D non-local mean denoising model for enhanced MRI image analysis.
  • Utilized an optimized TransUNet model for structural segmentation of tomato tissues.
  • Applied ACS-CIPSO algorithm for refined structural T2 relaxation inversion.
  • Acquired multi-echo MRI data from six distinct tissue types.

Main Results:

  • Developed an innovative approach to reduce voxel noise in low-field multi-echo MRI while preserving relaxation variability.
  • Identified consistent patterns in moisture mobility (T2) and content (A) across various cherry tomato structures during ripening.
  • Characterized bound (T21), semi-bound (T22), and free (T23) water content changes using tri-exponential analysis.

Conclusions:

  • The developed low-field MRI method provides a quantitative and non-destructive means to assess moisture status and ripening in fruits.
  • Insights into water dynamics offer a novel perspective on fruit ripening mechanisms.
  • This research establishes a pathway for precise ripening expression assessment in tomatoes and potentially other fruits.