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Sichuan Da Xue Xue Bao Yi Xue Ban. 2010 Sep;41（5）:881-4. [Nonenhanced renal artery MR angiography with time spatial labeling inversion pulse technology and its clinical values]. [Article in Chinese] Chen X1, Xia CC, Sun JY, Li CX, Yuan Y, Tang HH, Song B, Li ZL. Author information 1Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
Abstract OBJECTIVE: To evaluate the feasibility of nonenhanced renal artery MR angiography （MRA） with respiratory-gated time spatial labeling inversion pulse （time-slip） and its clinical application. METHODS: Thirty-two consecutive patients underwent the 1.5 T MRI （TOSHIBA EXCELART Vantage） examination to visualize renal artery with contrast-enhanced MRA （CEMRA） and the examination with time-slip technology. Signal to noise ratio （SNR） and contrast to noise ratio （CNR） were measured on CEMRA and Time-slip images, respectively. Two experienced radiologists assessed the imaging quality of renal artery MRA on 3D-MIPs reconstructed images. RESULTS: Sixty-four renal arteries and 3 accessory renal arteries in 32 patients were visualized on both time-slip and CEMRA. SNR values on Time-slip and CEMRA were 102.7 +/- 16.2 and 83.9 +/- 17.7 （t = -4.625, P < 0.001）; CNR were 97.8 +/- 16.1 and 78.8 +/- 18.3 （t = -4.554, P < 0.001）, respectively. Time-slip MIP images obtained higher quality than CEMRA did （Z = -2.318, P = 0.02）, and venous contamination was sharply reduced on Time-slip technology when compared with CEMRA （Z = -4.895, P = 0.001）. CONCLUSION: Non-enhanced renal artery MRA with respiratory-gated time-slip technology can provide higher SNR images of renal artery than conventional CEMRA, which can provide more information for clinical decision-making. PMID: 21302464
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