Intraindividual comparison of myocardial delayed enhancement MR imaging using gadobenate dimeglumine at 1.5 T and 3 T
Autor: | Tobias Hoevelborn, Claus D. Claussen, Klaus Peter Lodemann, Bernhard Klumpp, Ulrich Kramer, Michael Fenchel, Joern J.W. Sandstede, Stephan Miller, Achim Seeger |
---|---|
Rok vydání: | 2008 |
Předmět: |
Adult
Male medicine.medical_specialty Wilcoxon signed-rank test Image quality media_common.quotation_subject Contrast Media Infarction Ventricular Function Left Meglumine Text mining Organometallic Compounds medicine Humans Contrast (vision) Radiology Nuclear Medicine and imaging Myocardial infarction Aged media_common Neuroradiology Models Statistical business.industry Myocardium Body Weight Ultrasound Reproducibility of Results General Medicine Middle Aged medicine.disease Magnetic Resonance Imaging Female Radiology business |
Zdroj: | European Radiology. 19:1124-1131 |
ISSN: | 1432-1084 0938-7994 |
DOI: | 10.1007/s00330-008-1248-7 |
Popis: | For contrast-enhanced imaging techniques relying on strong T1 weighting, 3 T provides increased contrast compared with 1.5 T. The aim of our study was the intraindividual comparison of delayed enhancement MR imaging at 1.5 T and at 3 T. Twenty patients with myocardial infarction were examined at 1.5 T and 3 T. Fifteen minutes after injection of contrast agent (0.1 mmol gadobenate dimeglumine per kg body weight), inversion recovery gradient recalled echo (IR-GRE) sequences were acquired (1.5 T/3 T: TR 11.0/9.9 ms, TE 4.4/4.9 ms, flip 30 degrees /30 degrees , slice thickness 6/6 mm) to assess myocardial viability. Two observers rated image quality (Wilcoxon signed rank test). Quantification of hyperenhanced myocardium and standardized SNR/CNR measurements were performed (Student's t test). There was no significant difference with respect to image quality (1.5 T/3 T: 3.5/3.3, p = 0.34, reader 1; 2.4/2.7, p = 0.12, reader 2) and infarction size (760 +/- 566/828 +/- 677 mm(2) at 1.5 T, 808 +/- 639/826 +/- 726 mm(2) at 3 T, reader 1/reader 2, p0.05). Mean SNR in hyperenhanced/normal myocardium was 19.2/6.2 at 1.5 T and 29.5/8.8 at 3 T (p0.05). Mean CNR was 14.3 at 1.5 T and 26.0 at 3 T (p0.05). Delayed enhancement MR imaging at 3 T is a robust procedure yielding superior tissue contrast at 3 T compared with 1.5 T which is, however, not reflected by increased image quality. |
Databáze: | OpenAIRE |
Externí odkaz: |