Magnetic Resonance Portal Venography: Comparison between Non-Contrast Enhanced Images with Time-Spatial Labeling Inversion Pulses Technique and Contrast-Enhanced Images

比較無對比劑磁振血管攝影（Time-SLIP）技術與注射對比劑在肝門靜脈的影像品質

10.6200/TCMJ.2013.10.4.04

黃偉倫(Wei-Lun Huang)；丘思穎(See-Ying Chiou)；林新傑(Hsin-Chieh Lin)；李威興(Wei-Hsing Lee)；陳名聖(Ming-Sheng Chern)

磁振造影 ； 無顯影劑磁振血管攝影 ； 肝門靜脈血管攝影 ； MRI ； non-contrast MRV ； portal venography

北市醫學雜誌

10卷4期（2013 / 12 / 30）

325 - 336

英文

Objectives: The purposes of this study were (1) to evaluate the application of non-contrast enhanced (non-CE) Time-Spatial Labeling Inversion Pulses (Time-SLIP) technique in demonstrating the liver portal venous system and, (2) to analyze the imaging quality of magnetic resonance (MR) portal venography with non-CE Time-SLIP technique, and compared with that of traditional contrast-enhanced (CE) images. Methods: Thirty healthy subjects were enrolled in this study. Two radiologists interpreted and scored the images with four-point scale. In addition, the signal to noise ratio (SNR) and contrast to noise ratio (CNR) of the original images of non-CE Time-SLIP and CE techniques was objectively measured. Results: The mean score of imaging quality of non-CE Time-SLIP images (3.42±0.62) was significantly higher than that of CE images (2.75 ±0.60) (p＜.001). SNR of non-CE image of 27 cases was higher than that of CE image. The mean SNR of non-CE images (50.58) was significantly higher than that of CE images (32.36) (p＜.001). The mean CNR of non-CE images (34.64) was significantly higher than that of CE images (8.99) (p＜.001). Conclusion: Portal venous system can be demonstrated using the MR portal venography with non-CE Time-SLIP technique, without intravenous administration of contrast medium, and provide imaging quality as good as that of CE technique. Therefore, non-CE Time-SLIP MR portal venography can be a new imaging modality of choice to demonstrate the portal venous system.

Objectives: The purposes of this study were (1) to evaluate the application of non-contrast enhanced (non-CE) Time-Spatial Labeling Inversion Pulses (Time-SLIP) technique in demonstrating the liver portal venous system and, (2) to analyze the imaging quality of magnetic resonance (MR) portal venography with non-CE Time-SLIP technique, and compared with that of traditional contrast-enhanced (CE) images. Methods: Thirty healthy subjects were enrolled in this study. Two radiologists interpreted and scored the images with four-point scale. In addition, the signal to noise ratio (SNR) and contrast to noise ratio (CNR) of the original images of non-CE Time-SLIP and CE techniques was objectively measured. Results: The mean score of imaging quality of non-CE Time-SLIP images (3.42±0.62) was significantly higher than that of CE images (2.75 ±0.60) (p＜.001). SNR of non-CE image of 27 cases was higher than that of CE image. The mean SNR of non-CE images (50.58) was significantly higher than that of CE images (32.36) (p＜.001). The mean CNR of non-CE images (34.64) was significantly higher than that of CE images (8.99) (p＜.001). Conclusion: Portal venous system can be demonstrated using the MR portal venography with non-CE Time-SLIP technique, without intravenous administration of contrast medium, and provide imaging quality as good as that of CE technique. Therefore, non-CE Time-SLIP MR portal venography can be a new imaging modality of choice to demonstrate the portal venous system.