A Comparison of the Prospective Acquisition Correction Technique with Respiratory Triggering Technique in a 3-D MR Pancreaticobiliary System Angiography: A Focus on Normal Healthy Subjects

• Published in: Applied magnetic resonance 2011-05, Vol.40 (3), p.279-289
• Main Authors: Goo, Eun-Hoe, Kweon, Dae Cheol, Dong, Kyung-Rae, Choi, Sung-Hyun, Ryu, Young-Hwan, Lee, Sun-Yeob, Park, Cheol-Soo, Cho, Jae-Hwan, Lee, Jae-Seung, Kim, Moon-Jib, Chung, Woon-Kwan, Choe, Chong-Hwan
• Format: Article
• Language: English
• Subjects: Abdomen; Angiography; Atoms and Molecules in Strong Fields; Bile ducts; Cushions; Image acquisition; Image quality; Laser Matter Interaction; Magnetic resonance; Magnetic resonance imaging; Medical imaging; Morphology; Organic Chemistry; Physical Chemistry; Physics; Physics and Astronomy; Qualitative analysis; Quantitative analysis; Rank tests; Respiration; Signal to noise ratio; Solid State Physics; Spectroscopy/Spectrometry
• ISSN: 0937-9347; 1613-7507
• DOI: 10.1007/s00723-011-0200-1

This study aimed at comparing the quality of images produced using the prospective acquisition correction (PACE) technique based on a navigator with that produced by the respiratory triggering (RT) technique based on a wireless respiratory triggering cushion. Twenty normal healthy people underwent magnetic resonance (MR) cholangiopancreatography based on a three-dimensional (3-D) respiratory triggering technique using either the PACE or RT techniques. For quantitative analysis, the signal-to-noise and contrast-to-noise ratios were calculated. For qualitative analysis, the morphology of the anatomical structures, artifacts due to respiration and the definition of cholangiopancreatography were evaluated based on the following five-point scale. The excellence of the images was also evaluated independently by two specialists in abdominal imaging and two radiological technicians, whose results were analyzed statistically using a Wilcoxon signed-rank test. With regard to the morphology of the anatomical structures and sharpness of the pancreaticobiliary tract, the PACE technique had higher scores than the RT one ( P  = 0.07). However, there were no significant differences in artifacts due to respiration between the two techniques ( P  = 0.774). The signal-to-noise and contrast-to-noise ratios were significantly higher in the PACE technique ( P