title: Susceptibility-induced changes in signal intensity from spin-echo versus gradient-echo sequences.
abstract: This manuscript describes a study of the evaluation of T2 and T2* changes in a hypervascular tumor model (hemodialyzer phantom) under conditions simulating dynamic perfusion study. The measured 1/T2* was strongly dependent on the compartmentalization of contrast material within the model, whereas the observed 1/T2 was not. Gradient-echo magnetic resonance (MR) imaging may be more suitable than a spin-echo MR imaging for the evaluation of tumor vascularity.
authors.affiliation: Department of Radiology, Fukui Medical University, Fukui, Japan. uematsu@oasis.rad.upenn.edu
authors.forename: Hidemasa
authors.initials: H
authors.lastname: Uematsu
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Matsuda
authors.forename: Masaya
authors.initials: M
authors.lastname: Takahashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Inoue
authors.forename: Koji
authors.initials: K
authors.lastname: Hayashi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Yamada
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Yonekura
authors.forename: Harumi
authors.initials: H
authors.lastname: Itoh
mesh_terms: D003287:Contrast Media; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009369:Neoplasms / Q000098:blood supply; D006435:Renal Dialysis / Q000295:instrumentation
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA