Your browser doesn't support javascript.
loading
Balanced Steady-State Free Precession Cine MR Imaging in the Presence of Cardiac Devices: Value of Interleaved Radial Linear Combination Acquisition With Partial Dephasing.
Xiang, Jie; Lamy, Jerome; Lampert, Rachel; Peters, Dana C.
Afiliação
  • Xiang J; Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA.
  • Lamy J; Department of Radiology and Biomedical Imaging, Yale University, New Haven, Connecticut, USA.
  • Lampert R; Department of Medicine, Cardiovascular Division, Yale University, New Haven, Connecticut, USA.
  • Peters DC; Department of Biomedical Engineering, Yale University, New Haven, Connecticut, USA.
J Magn Reson Imaging ; 58(3): 782-791, 2023 09.
Article em En | MEDLINE | ID: mdl-36373998
BACKGROUND: Balanced steady-state free precession (bSSFP) is important in cardiac MRI but suffers from off-resonance artifacts. The interpretation-limiting artifacts in patients with cardiac implants remain an unsolved issue. PURPOSE: To develop an interleaved radial linear combination bSSFP (lcSSFP) method with partial dephasing (PD) for improved cardiac cine imaging when implanted cardiovascular devices are present. STUDY TYPE: Prospective. PHANTOM AND SUBJECTS: Flow phantom adjacent to a pacemaker and 10 healthy volunteers (mean age ± standard deviation: 31.9 ± 2.9 years, 4 females) with a cardioverter-defibrillator (ICD) positioned extracorporeally at the left chest in the prepectoral region. FIELD STRENGTH/SEQUENCE: A 3-T, 1) Cartesian bSSFP, 2) Cartesian gradient echo (GRE), 3) Cartesian lcSSFP, and 4) radial lcSSFP cine sequences. ASSESSMENT: Flow artifacts mitigation using PD was validated with phantom experiments. Undersampled radial lcSSFP with interleaving across phase-cyclings and cardiac phases (RLC-SSFP), combined with PD, was then employed for achieving improved quality of cine images from left ventricular short-axis view. The image quality in the presence of cardiac devices was qualitatively assessed by three independent raters (1 = worst, 5 = best), regarding five criteria (banding artifacts, streak artifacts, flow artifacts, cavity visibility, and overall image quality). STATISTICAL TESTS: Wilcoxon rank-sum test for the five criteria between Cartesian bSSFP cine and RLC-SSFP with PD. Fleiss kappa test for inter-reader agreement. A P value < 0.05 was considered statistically significant. RESULTS: Based on simulations and phantom experiments, 60 projections per phase cycling and 1/6 PD were chosen. The in vivo experiments demonstrated significantly reduced banding artifacts (4.8 ± 0.4 vs. 2.7 ± 0.7), fewer streak artifacts (3.7 ± 0.6 vs. 2.6 ± 0.7) and flow artifacts (4.4 ± 0.4 vs. 3.7 ± 0.6), therefore improved cavity visibility (4.1 ± 0.4 vs. 2.9 ± 0.9) and overall quality (4.0 ± 0.4 vs. 2.7 ± 0.7). DATA CONCLUSION: RLC-SSFP method with PD may improve cine image quality in subjects with cardiac devices. EVIDENCE LEVEL: 2. TECHNICAL EFFICACY: Stage 1.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Imagem Cinética por Ressonância Magnética / Coração Limite: Female / Humans Idioma: En Revista: J Magn Reson Imaging Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Imagem Cinética por Ressonância Magnética / Coração Limite: Female / Humans Idioma: En Revista: J Magn Reson Imaging Ano de publicação: 2023 Tipo de documento: Article