Artigo Revisado por pares

Analysis of Cardiac Function???Comparison Between 1.5 Tesla and 3.0 Tesla Cardiac Cine Magnetic Resonance Imaging

2006; Lippincott Williams & Wilkins; Volume: 41; Issue: 2 Linguagem: Inglês

10.1097/01.rli.0000192023.96494.af

ISSN

1536-0210

Autores

Henrik J. Michaely, Kambiz Nael, Stefan O. Schoenberg, Gerhard Laub, Maximilian F. Reiser, J. Paul Finn, Stefan G. Ruehm,

Tópico(s)

Atomic and Subatomic Physics Research

Resumo

We sought to assess the feasibility of magnetic resonance imaging to evaluate cardiac function at 3.0 T compared with 1.5 T.In a prospective intraindividual comparative study, 12 volunteers (range, 18-54 years), and 2 patients (range, 43-53 years) underwent cardiac cine magnetic resonance at both 3.0 T and 1.5 T. Data were acquired both with a steady-state free precession sequence (SSFP) and a spoiled gradient echo (SGE) sequence. If necessary, a frequency scout was used to correct for off-resonance artifacts. For both SSFP and SGE imaging, 6-mm thick retrospectively EKG-gated short axis views were acquired with equal matrix size (192 x 163) and comparable repetition time (TR). Cardiac function parameters were determined manually by a single investigator. Cardiac function parameters, signal to noise ratio (SNR), contrast to noise ratio (CNR), and the presence of artifacts were compared between the 2 magnetic field strengths. For statistical analysis, a Pearson's correlation coefficient was calculated, and a paired Student t test was used to test statistical significance.Very good correlations between cardiac function parameters at 1.5 T and 3.0 T (r > 0.84, P < 0.0011) were obtained. Compared with SGE, SSFP more frequently was prone to artifacts. With SSFP/SGE at 3.0 T, a SNR gain of 9.4/16% was achieved compared with 1.5 T.Functional cardiac cine magnetic resonance imaging can be regarded as equally accurate at 3.0 T compared with 1.5 T. Compared with SSFP imaging, the SGE sequence benefits more from higher field strengths and is less affected by artifacts.

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