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Title: Comparison of X-ray CT and MRI of watercore disorder of different apple cultivars
Authors: Herremans, Els * ×
Melado-Herreros, Angela *
Defraeye, Thijs
Verlinden, Bert
Hertog, Maarten
Verboven, Pieter
Val, Jesus
Fernández-Valle, M. Encarnación
Bongaers, Evi
Estrade, Pascal
Wevers, Martine
Barreiro, Pilar
Nicolai, Bart #
Issue Date: 2014
Publisher: Elsevier
Series Title: Postharvest Biology and Technology vol:87 pages:42-50
Abstract: Watercore is an internal disorder that appears as water-soaked, glassy regions near the core in apples.Fast and non-destructive solutions for sensing watercore would be readily accepted in the postharvest industry. X-ray CT and MRI were compared as potential imaging technologies for detecting this particular disorder. After matching the 3D datasets of X-ray CT and MRI, the images that were obtained on identical fruit were compared quantitatively. Both MRI and CT were able to detect watercore, however the contrast in MRI images was superior. High-resolution micro-CT images showed the microstructural changes in watercore fruit: the intercellular spaces of the affected apple tissue are filled with water. This explained the higher density that is detected here by the X-rays and the higher water content in the MRI. Mean and variance of the frequency distribution of MRI and X-ray CT intensity appeared to be a parameter that allows the identification of healthy apples from affected fruit. Automatic image processing based on thresholding the images resulted in comparable watercore classification accuracy of up to 89% for X-ray CT and 79% for MRI data, despite the better contrast in the MRI images.
ISSN: 0925-5214
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Structural Composites and Alloys, Integrity and Nondestructive Testing
* (joint) first author
× corresponding author
# (joint) last author

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