Mealiness assessment in apples using MRI techniques

Barreiro Elorza, Pilar and Ruiz Cabello Osuna, Jesus Maria and Fernandez Valle, M. Encarnacion and Ortiz, Christopher and Ruiz-Altisent, Margarita (1999). Mealiness assessment in apples using MRI techniques. "Magnetic Resonance Imaging", v. 17 (n. 2); pp. 275-281. ISSN 0730-725X.


Title: Mealiness assessment in apples using MRI techniques
  • Barreiro Elorza, Pilar
  • Ruiz Cabello Osuna, Jesus Maria
  • Fernandez Valle, M. Encarnacion
  • Ortiz, Christopher
  • Ruiz-Altisent, Margarita
Item Type: Article
Título de Revista/Publicación: Magnetic Resonance Imaging
Date: February 1999
ISSN: 0730-725X
Volume: 17
Freetext Keywords: Apple; Mealiness; Internal breakdown
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Small samples of Top Red apples stored 6 months under controlled atmosphere (expected to be non-mealy) and 2°C (expected to be mealy) have been used for MRI imaging. Multi-slice-multi-echo magnetic resonance images (64*64 pixels) have been recorded with a 8 ms echo time. Three out of four apples corresponding to the sample maintained under controlled atmosphere did not developed mealiness while three out of four fruits corresponding to the sample stored at 2°C became mealy after 6 months of storage. The minimum T2 values obtained for the mealy apples show to be significantly lower (F = 13.21) when compared with non-mealy apples pointing that a more desegregated structure and a lower juiciness content leads to lower T2 signal. Also, there is a significant linear correlation (r = −0.76) between the number of pixels with a T2 value below 35 ms within a fruit image and the deformation parameter registered during the Magness–Taylor firmness test. Finally, all T2 maps of mealy apples show a regional variation of contrast which is not shown for non-mealy apples. Significant differences (F = 19.43) between mealy and non-mealy apples are found in the histograms of the T2 maps as mealy apples show a skew histogram combined with a “tail” in their high T2 extreme which is not shown in the histograms of non-mealy apples. These histogram features are also shown for an apple showing internal breakdown indicating that in mealy apples there is a differential water movement that may precede internal breakdown.

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Item ID: 6152
DC Identifier:
OAI Identifier:
DOI: 10.1016/S0730-725X(98)00160-X
Official URL:
Deposited by: Memoria Investigacion
Deposited on: 24 Feb 2011 09:30
Last Modified: 20 Apr 2016 15:27
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