Application of 3D free-breathing Star VIBE sequence in abdominal enhanced MR in children / 中国医学影像技术

ABSTRACT

Objective To explore the application value of 3D free-breathing Star VIBE sequence in abdominal contrast-enhanced MR scanning of children. Methods Totally 72 children with abdominal lesions underwent contrast-enhanced MR scanning with 3D free-breathing Star VIBE sequence and turbo fast low angle shot (tfl) sequence, respectively. The enhanced T1W images obtained with two scanning sequences were scored subjectively, and SNR and CNR were calculated objectively. Results The scores of respiratory motion artifacts, intrahepatic vascular and inferior vena cava structure display, gastrointestinal peristalsis artifacts, lesion clarity and overall image quality score on 3D free-breathing Star VIBE sequence images were higher than those on tfl sequence images (all P<0.001). SNR and CNR of 3D free breathing Star VIBE sequence were 25.14 (20.42, 30.50), 9.20 (7.36, 10.42), of tfl sequence were 20.67 (19.00, 23.50) and 6.08(3.00, 8.50), respectively. SNR and CNR of 3D free-breathing Star VIBE sequence were higher than those of tfl sequence (all P<0.001). Conclusion 3D free-breathing Star VIBE sequence can significantly reduce motion artifacts and increase SNR and CNR, demonstrating important clinical value in diagnosis of abdominal diseases in children.