Single-shot inversion recovery TrueFISP for assessment of myocardial infarction.

Abstract

OBJECTIVE:

The aim of the study was to assess the diagnostic accuracy of imaging the myocardium with a fast multislice inversion recovery 2D single-shot true fast imaging with steady-state precession (trueFISP) sequence during a single breath-hold in comparison with an established segmented inversion recovery turbo fast low-angle shot (turboFLASH) sequence.

SUBJECTS AND METHODS:

Forty-three patients with myocardial infarction were examined on a 1.5-T MR system 10 min after administration of contrast material (gadodiamide, 0.2 mmol/kg) with a single-shot 2D multislice technique (single-shot inversion recovery trueFISP) that allows one to image the entire short axis during one breath-hold (18 heartbeats) and with a segmented 2D single-slice technique (inversion recovery turboFLASH) that requires one breath-hold per slice (12 heartbeats). Signal intensity was determined in normal myocardium, in infarcted myocardium, and in the left ventricle. The contrast-to-noise ratio (CNR) of normal and infarcted myocardium was determined. The areas of hyperintense infarctions on selected slices and the entire volumes were compared for both sequence techniques.

RESULTS:

The inversion recovery trueFISP sequence has a lower CNR than the inversion recovery turboFLASH sequence (mean values, 10.0 vs 12.9, respectively; p = 0.005) for differentiation of viable from nonviable myocardium. The CNR of injured myocardium and blood in the left ventricular cavity also has a lower value for the multislice technique compared with the single-slice technique (0.6 vs 1.2, respectively; p = 0.045). Assessment of the area of infarction within one slice (r = 0.97, p < 0.002) and of the volume of the entire infarction (r = 0.96, p < 0.003) is possible with excellent correlation of both techniques.

CONCLUSION:

Despite having a lower CNR, the inversion recovery 2D single-shot trueFISP sequence allows fast and accurate identification of the area and volume of infarction with high spatial resolution within a single breath-hold.

• Authors: Armin Huber, Stefan O Schoenberg, Benedikt Spannagl, Johannes Rieber, Isabelle Erhard, Volker Klauss, Maximilian F Reiser
• Journal: AJR. American journal of roentgenology (AJR Am J Roentgenol) Vol. 186 Issue 3 Pg. 627-33 (Mar 2006) ISSN: 0361-803X [Print] United States
• PMID: 16498088 (Publication Type: Journal Article)

Chemical References

• Contrast Media
• gadodiamide
• Gadolinium DTPA

Topics

• Adult
• Aged
• Contrast Media
• Female
• Gadolinium DTPA
• Humans
• Image Processing, Computer-Assisted
• Magnetic Resonance Imaging (methods)
• Male
• Middle Aged
• Myocardial Infarction (diagnosis)