|Direct MR Arthrography of the Shoulder at 3 Tesla: Optimization of Gadolinium Concentration|
|Shang, Yao; Zheng, Zhuo-zhao; Li, Xuan|
|关键词||Magnetic Resonance Imaging Shoulder Arthrography Gadopentetate Dimeglumine|
|刊名||JOURNAL OF MAGNETIC RESONANCE IMAGING|
|WOS标题词||Science & Technology|
|类目[WOS]||Radiology, Nuclear Medicine & Medical Imaging|
|研究领域[WOS]||Radiology, Nuclear Medicine & Medical Imaging|
|关键词[WOS]||IODINATED CONTRAST ; FIELD-STRENGTH|
Purpose: To determine the optimal concentration of gadopentetate dimeglumine for direct shoulder MR arthrography at 3T in vivo.
Materials and Methods: Sixty-eight consecutive shoulder MR arthrograms were obtained with 1 mmolGd/L (n = 12) 2 mmolGd/L In = 12), 4 mmolGd/L (n = 12), 6 mmolGd/L In = 12), 9 mmolGd/L (n = 10) and 12 mmolGd/L (n = 10). All postinjection fat-suppressed T1-weighted and T2-weighted images were analyzed retrospectively. For qualitative evaluation, image contrast was graded on a subjective three-level scale (excellent, moderate, and poor). For quantitative analysis, the contrast-to-noise ratio (CNR) of intra-articular fluid to muscle was measured.
Results: All postinjection T1-weighted images and T2-weighted images with I mmolGd/L, 2 mmolGd/L, 4 mmolGd/L, and 6 mmolGd/L were qualitatively evaluated as excellent or moderate. Two of the ten 9-mmolGd/L images and seven of the ten 12-mmolGd/L images were rated as poor with regard to the T2 image contrast. On the T1-weighted images, no significant difference existed between the CNRs of the six concentrations, but a peak CNR was seen at the concentration of 6 mmolGd/L. On the T2-weighted images, CNRs at concentrations of 1 mmolGd/L, 2 mmolGd/L. 4 mmolGd/L, 6 mmolGd/L, and 9 mmolGd/L showed no statistical difference, but were all significantly higher than that with 12 mmolGd/L.
Conclusion: The acceptable concentration of gadopentetate dimeglumine for shoulder MR arthrography at 3T was found to be in the range of I mmolGd/L to 6 mmolGd/L. 6 mmolGd/L may be the optimal concentration.
|作者单位||Peking Univ, Hosp 3, Dept Radiol, Beijing 100191, Peoples R China|
|Shang, Yao,Zheng, Zhuo-zhao,Li, Xuan. Direct MR Arthrography of the Shoulder at 3 Tesla: Optimization of Gadolinium Concentration[J]. JOURNAL OF MAGNETIC RESONANCE IMAGING,2009,30(1):229-235.|
|APA||Shang, Yao,Zheng, Zhuo-zhao,&Li, Xuan.(2009).Direct MR Arthrography of the Shoulder at 3 Tesla: Optimization of Gadolinium Concentration.JOURNAL OF MAGNETIC RESONANCE IMAGING,30(1),229-235.|
|MLA||Shang, Yao,et al."Direct MR Arthrography of the Shoulder at 3 Tesla: Optimization of Gadolinium Concentration".JOURNAL OF MAGNETIC RESONANCE IMAGING 30.1(2009):229-235.|