The authors describe a fast MR sequence allowing to obtain a myelographic-like, markedly T2-weighted, image quite similar to conventional myelographies. Relative to conventional spin-echo sequences, in which echoes are encoded so as to achieve the same phase, each echo of the sequence here employed is given a different phase encoding. The sequence, called MYUR (myelography-urography) is based on the generation, after a 90 degrees pulse, of a "train" of 256 echoes, each one phase-encoded differently, by multiple 180 degrees pulses, producing a single image. The total duration of such a sequence, with 2 repetitions, is 21 seconds. The MR myelographic sequence allows to univocally study tissues with a very long T2 relaxation time; under normal conditions, only cerebrospinal fluid, urine and bile are demonstrated. A resistive MR unit operating at 0.28 T was employed in the present study. MR myelography is capable of pointing out an eventual dural sac compression or a space-occupying mass, thus allowing an effective scout-view to center the subsequent pulse sequences; all MR-myelographic exams need to be completed with other short and long TR sequences.

Fanucci, E., Sergiacomi, G., Pocek, M., Floris, R., & Simonetti, G. (1992). The use of the single-pulse RARE sequence in the study of the cerebrospinal axis [Uso della sequenza "RARE" a singola eccitazione nello studio dell'asse cerebrospinale.]. LA RADIOLOGIA MEDICA, 84(5), 544-548.

The use of the single-pulse RARE sequence in the study of the cerebrospinal axis [Uso della sequenza "RARE" a singola eccitazione nello studio dell'asse cerebrospinale.]

FANUCCI, EZIO;SERGIACOMI, GIANLUIGI;POCEK, MARCO;FLORIS, ROBERTO;SIMONETTI, GIOVANNI MARIA EGISTO
1992

Abstract

The authors describe a fast MR sequence allowing to obtain a myelographic-like, markedly T2-weighted, image quite similar to conventional myelographies. Relative to conventional spin-echo sequences, in which echoes are encoded so as to achieve the same phase, each echo of the sequence here employed is given a different phase encoding. The sequence, called MYUR (myelography-urography) is based on the generation, after a 90 degrees pulse, of a "train" of 256 echoes, each one phase-encoded differently, by multiple 180 degrees pulses, producing a single image. The total duration of such a sequence, with 2 repetitions, is 21 seconds. The MR myelographic sequence allows to univocally study tissues with a very long T2 relaxation time; under normal conditions, only cerebrospinal fluid, urine and bile are demonstrated. A resistive MR unit operating at 0.28 T was employed in the present study. MR myelography is capable of pointing out an eventual dural sac compression or a space-occupying mass, thus allowing an effective scout-view to center the subsequent pulse sequences; all MR-myelographic exams need to be completed with other short and long TR sequences.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MED/36 - Diagnostica per Immagini e Radioterapia
English
Con Impact Factor ISI
article; brain; comparative study; human; instrumentation; methodology; myelography; nuclear magnetic resonance imaging; pathology; spinal cord; time; urography; Brain; Comparative Study; English Abstract; Evaluation Studies; Human; Magnetic Resonance Imaging; Myelography; Spinal Cord; Time Factors; Urography
Fanucci, E., Sergiacomi, G., Pocek, M., Floris, R., & Simonetti, G. (1992). The use of the single-pulse RARE sequence in the study of the cerebrospinal axis [Uso della sequenza "RARE" a singola eccitazione nello studio dell'asse cerebrospinale.]. LA RADIOLOGIA MEDICA, 84(5), 544-548.
Fanucci, E; Sergiacomi, G; Pocek, M; Floris, R; Simonetti, Gme
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/55064
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