Time-resolved contrast-enhanced pulmonary MR angiography using sensitivity encoding (SENSE)

Yoshiharu Ohno, Hideaki Kawamitsu, Takanori Higashino, Daisuke Takenaka, Hirokazu Watanabe, Marc Van Cauteren, Masahiko Fujii, Hiroto Hatabu, Kazuro Sugimura

研究成果: Article査読

51 被引用数 (Scopus)

抄録

Purpose: To evaluate the relationship between gadolinium concentration and signal-to-noise ratio (SNR) on sensitivity encoding (SENSE) images, and determine the appropriate bolus injection protocol for visualizing pulmonary circulation. Materials and Methods: Eighteen different gadolinium concentration phantoms (0, 0.01, 0.05, 0.1, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5, 2.0, 5.0, 10.0, 20.0, 30.0, 50.0, and 100.0 mmol/L) were analyzed to determine the relationship between gadolinium concentration and SNR on SENSE images in a phantom study. In an in vivo study, 3 mL (protocol A) or 6 mL (protocol B) of Gd-DTPA BMA at 3 mL/second, and 5 mL of Gd-DTPA BMA at 5 mL/second (protocol C) were administered to eight normal volunteers for contrast-enhanced (CE) pulmonary MR angiography (MRA) with SENSE. The peak SNRs of pulmonary parenchyma and the difference in SNR between pulmonary artery (PA) and pulmonary vein (PV) at peak SNR in the PA were statistically evaluated. Results: For each flip angle at each gadolinium concentration. the SNRs and contrast-to-noise ratios (CNRs) of the SENSE images were significantly lower than those acquired with a nonparallel imaging technique (P < 0.05). The peak SNR of the pulmonary parenchyma, and differences in SNR between the PA and PV at the peak SNR of the PA obtained with a 5-mL/second bolus injection protocol were found to be significantly higher than those obtained with other protocols (P < 0.05). Conclusion: 3D-CE-MRA using SENSE demonstrated linearity between gadolinium concentration and SNR, and resulted in MRA with high spatial and temporal resolution with the aid of a sharp bolus injection protocol.

本文言語English
ページ(範囲)330-336
ページ数7
ジャーナルJournal of Magnetic Resonance Imaging
17
3
DOI
出版ステータスPublished - 01-03-2003
外部発表はい

All Science Journal Classification (ASJC) codes

  • 放射線学、核医学およびイメージング

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