文档介绍：ARTICLE IN PRESS
Journal of ic Resonance 173 (2005) 97–115
ate/jmr
The SIMRI project: a versatile and interactive MRI simulator
H. Benoit-Cattina,*, G. Collewetb, B. Belaroussia, H. Saint-Jalmesc, C. Odeta
a CREATIS, RS #5515, U 630 Inserm, Universite´ Claude Bernard Lyon 1, INSA Lyon, Baˆt. B. Pascal, 69621 Villeurbanne, France
b CEMAGREF/Food Processes Engineering Research Unit, 17 av de Cucille´, 35044 Rennes, France
c Laboratoire de Re´sonance Magne´tique Nucle´aire—Me´thodologie et Instrumentation en Biophysique, RS 5012,
Universite´ Claude Bernard Lyon 1—CPE Lyon, France
Received 6 April 2004; revised 10 September 2004
Abstract
This paper gives an overview of SIMRI, a new 3D MRI simulator based on the Bloch equation. This simulator proposes an effi-
Ã
cient management of the T 2 effect, and in a unique simulator integrates most of the simulation features that are offered in different
simulators. It takes into account the main static field value and enables realistic simulations of the chemical shift artifact, including
off-resonance phenomena. It also simulates the artifacts linked to the static field inhomogeneity like those induced by susceptibility
variation within an object. It is implemented in the C language and the MRI sequence programming is done using high level C func-
tions with a simple programming interface. To manage large simulations, the ization kernel is implemented in a parallelized
way that enables simulation on PC grid architecture. Furthermore, this simulator includes a 1D interactive interface for pedagogic
purpose illustrating the ization vector motion as well as the MRI contrasts.
Ó 2004 Elsevier Inc. All rights reserved.
Keywords: MRI simulation; Bloch equation; Artefacts; Field inhomogeneity; Software
1. Introduction (gold standard) and the difficulty of constructing ana-
tomical realistic physical phantoms. In this context, an
The simulation of ic resonance imaging MRI simulator provides an interesting asse