Magnetization transfer contrast: Method for improving contrast in gradient-recalled-echo images

S. D. Wolff, J. Eng, R. S. Balaban

Research output: Contribution to journalArticlepeer-review

Abstract

A method that improves contrast in gradient-recalled-echo magnetic resonance images is described. The increase in contrast is produced by applying low-power radio-frequency irradiation 5-10 kHz from the main water proton resonance frequency to excite macromolecular hydrogen-1 nuclei as part of a conventional gradient-recalled-echo sequence. The contrast so obtained is theoretically different from T1 or T2 contrast and has been termed magnetization transfer contrast. Cat head images were acquired in vivo with this method at 4.7 and 1.5 T. Compared with conventional gradient-recalled-echo images, the magnetization transfer images demonstrate increased contrast between many tissue pairs, such as between white matter and blood and between gray matter and cerebrospinal fluid. The dependence of the magnetization transfer effect on repetition time and preirradiation power were also studied.

Original languageEnglish (US)
Pages (from-to)133-137
Number of pages5
JournalRADIOLOGY
Volume179
Issue number1
DOIs
StatePublished - Jan 1 1991
Externally publishedYes

Keywords

  • Brain, MR studies, 10.1214
  • Cerebral blood vessels, MR studies, 17.1214
  • Cerebrospinal fluid, MR studies, 10.1214
  • Magnetic resonance (MR), experimental
  • Magnetic resonance (MR), physics
  • Magnetic resonance (MR), pulse sequences
  • Magnetic resonance (MR), surface coils
  • Magnetic resonance (MR), technology
  • Muscles, MR studies, 40.1214

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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