PURPOSE: To determine the relative contrast of normal cranial tissues at magnetization transfer (MT) spin-echo magnetic resonance (MR) imaging. MATERIALS AND METHODS: MR imaging at 1.5 T was performed with conventional spin-echo techniques without and with off-resonance MT saturation pulses. The signal intensities of normal cranial tissues were measured in 10 healthy volunteers on spin-density- and T2-weighted images and in 10 patients on T1- weighted images obtained before and after administration of gadopentetate dimeglumine. RESULTS: MT saturation produced a significant (P < .01) reduction in signal from all tissues except cerebrospinal fluid and fat. Several gray matter structures had higher signal intensity than white matter on T1-weighted MT images. After administration of gadopentetate dimeglumine, imaging with the MT sequence increased visualization of normally enhancing structures. CONCLUSION: MT saturation pulses produce new patterns of tissue contrast that differ substantially from those seen on conventional spin-echo images.
PURPOSE: To determine the relative contrast of normal cranial tissues at magnetization transfer (MT) spin-echo magnetic resonance (MR) imaging. MATERIALS AND METHODS: MR imaging at 1.5 T was performed with conventional spin-echo techniques without and with off-resonance MT saturation pulses. The signal intensities of normal cranial tissues were measured in 10 healthy volunteers on spin-density- and T2-weighted images and in 10 patients on T1- weighted images obtained before and after administration of gadopentetate dimeglumine. RESULTS: MT saturation produced a significant (P < .01) reduction in signal from all tissues except cerebrospinal fluid and fat. Several gray matter structures had higher signal intensity than white matter on T1-weighted MT images. After administration of gadopentetate dimeglumine, imaging with the MT sequence increased visualization of normally enhancing structures. CONCLUSION: MT saturation pulses produce new patterns of tissue contrast that differ substantially from those seen on conventional spin-echo images.
Authors: N Tambasco; G P Pelliccioli; P Chiarini; G E Montanari; F Leone; M L Mancini; M Paciaroni; V Gallai Journal: Neuroradiology Date: 2003-02-21 Impact factor: 2.804
Authors: Hugo Pereira Pinto Gama; Antônio José da Rocha; Flávio Túlio Braga; Carlos Jorge da Silva; Antonio Carlos Martins Maia; Rogério Gonçalves de Campos Meirelles; José Iram Mendonça do Rego; Henrique Manoel Lederman Journal: Pediatr Radiol Date: 2005-11-11
Authors: H Hawighorst; W Schreiber; J Debus; M V Knopp; R Engenhart-Cabillic; G Brix; M Essig; G van Kaick Journal: Strahlenther Onkol Date: 1997-12 Impact factor: 3.621