FN Archimer Export Format
PT J
TI Noninvasive characterization of gonad maturation and determination of the sex of Pacific oysters by MRI
BT 
AF DAVENEL, Armel
   QUELLEC, Stéphane
   POUVREAU, Stephane
AS 1:1;2:1;3:2;
FF 1:;2:;3:PDG-DOP-DCB-PFOM-PI;
C1 Cemagref, Food Proc Engn Res Unit, F-35044 Rennes, France.
   IFREMER, Dept Marine Anim Ecophysiol & Physiol, Argenton Expt Lab, F-29840 Argenton En Landunvez, France.
C2 CEMAGREF, FRANCE
   IFREMER, FRANCE
SI ARGENTON
SE PDG-DOP-DCB-PFOM-PI
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
IF 1.58
TC 23
UR https://archimer.ifremer.fr/doc/2006/publication-1987.pdf
LA English
DT Article
DE ;Spin echo;Gradient echo;Sex determination;Gonad maturation;Oyster
AB The aim of this study was to test the ability of magnetic resonance imaging (MRI) technique to characterize gonad development and to determine the sex of live Pacific oysters through their shells. A preliminary nuclear magnetic resonance (NMR) retaxometry study was conducted to characterize T-1 and T-2 NMR relaxation parameters for the main oyster organs. This showed that T-1-weighted MRI sequences were most appropriate to optimize contrasts between tissues in images. The results showed that gray levels of gonads in images acquired with gradient-echo sequence were variably affected by T-2* weighting effect. However, the ovaries systematically gave a hypersignal in spin-echo T-1-weighted images, and stack histograms of female oysters showed a peak well separated from that of male oysters. An automated method is proposed to quantify the development of oysters and their gonad maturation and to identify their sex. (C) 2006 Elsevier Inc. All rights reserved.
PY 2006
PD OCT
SO Magnetic Resonance Imaging
SN 0730-725X
PU Elsevier
VL 24
IS 8
UT 000241253500015
BP 1103
EP 1110
DI 10.1016/j.mri.2006.04.014
ID 1987
ER

EF