TY - JOUR
T1 - Comparison of computer simulated and phantom measured phase variance in the study of trabecular bone
AU - Mihalopoulou, Evangelia
AU - Allein, Sophie
AU - Luypaert, Robert
AU - Eisendrath, Henri
AU - Bezerianos, Anastasios
AU - Panayiotakis, George
N1 - Funding Information:
Acknowledgments–Evangelia Mihalopoulou received a grant from the State Scholarship Foundation (SSF), Republic of Greece.
Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 1998/1
Y1 - 1998/1
N2 - A new method using magnetic resonance phase images for the assessment of trabecular bone structure has recently been proposed. To test this method, a mathematical model is developed which calculates the phase distribution in gradient echo acquired phase images of a structure of Pyrex glass rods immersed in a copper sulfate solution. Several experiments were performed using a phantom built in the same way as the structure used in the mathematical model. The results from the model are compared with those from the phantom tests, and the influence of resolution and bone area fraction on the phase dispersion is studied. The good correlation between theoretical and experimental results shows that phase variance increases with increasing resolution and bone density. However, the dependence of variance on bone density is less prominent for large pixel sizes.
AB - A new method using magnetic resonance phase images for the assessment of trabecular bone structure has recently been proposed. To test this method, a mathematical model is developed which calculates the phase distribution in gradient echo acquired phase images of a structure of Pyrex glass rods immersed in a copper sulfate solution. Several experiments were performed using a phantom built in the same way as the structure used in the mathematical model. The results from the model are compared with those from the phantom tests, and the influence of resolution and bone area fraction on the phase dispersion is studied. The good correlation between theoretical and experimental results shows that phase variance increases with increasing resolution and bone density. However, the dependence of variance on bone density is less prominent for large pixel sizes.
KW - Magnetic resonance
KW - Model
KW - Phase imaging
KW - Trabecular bone
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U2 - 10.1016/S0730-725X(97)00218-X
DO - 10.1016/S0730-725X(97)00218-X
M3 - Article
C2 - 9436944
AN - SCOPUS:0031962074
SN - 0730-725X
VL - 16
SP - 29
EP - 36
JO - Magnetic Resonance Imaging
JF - Magnetic Resonance Imaging
IS - 1
ER -