Real-time cardiac cine imaging with SPIDER: Steady-state projection imaging with dynamic echo-train readout

Andrew C. Larson*, Orlando P. Simonetti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Steady-state projection imaging with dynamic echo-train read-out (SPIDER) is a multiecho radial k-space trajectory TrueFISP sequence developed for real-time cine imaging of the heart. This new pulse sequence combines the superior SNR and blood-to-myocardium contrast of TrueFISP with the increased scan time efficiency of EPI and undersampled projection reconstruction. SPIDER sequence RF repetition time (TR) was minimized by limiting the echo-train to a length of three while acquiring the first and third echoes asymmetrically. A temporal resolution of 45 ms was achieved with TR/TE1/TE2/TE3 of 3.24/ 0.6/1.6/2.6 ms and a factor of 2 view sharing scheme. Phantom experiments showed little difference between the √T2/T1 weighting of the signals acquired at each of the echo times but did show considerable off-resonance modulation between them. In vivo experiments demonstrated the feasibility of using the SPIDER sequence for real-time imaging in the cardiac short axis orientation.

Original languageEnglish (US)
Pages (from-to)1059-1066
Number of pages8
JournalMagnetic resonance in medicine
Volume46
Issue number6
DOIs
StatePublished - 2001

Keywords

  • Cardiac MRI
  • Projection reconstruction
  • Real-time MRI
  • TrueFISP

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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