Renal Time-resolved MR Angiography: Quantitative Comparison of Gadobenate Dimeglumine and Gadopentetate Dimeglumine with Different Doses1
Markus Völk, MD,
Michael Strotzer, MD,
Markus Lenhart, MD,
Johannes Seitz, MD,
Christoph Manke, MD,
Stefan Feuerbach, MD and
Johann Link, MD
1 From the Department of Diagnostic Radiology, University Hospital of Regensburg, Franz-Josef-Strauss-Allee 11, D-93042 Regensburg, Germany. Received November 27, 2000; revision requested January 3, 2001; revision received February 15; accepted February 26. Address correspondence to M.V. (e-mail: markus.voelk@klinik.uni-regensburg.de).
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Figure 1a. Coronal three-dimensional time-resolved MR angiograms (4.0/1.65 with 25° flip angle) of the renal arteries in anteroposterior maximum intensity projection images. Differences in SNR were not significant between the two dose groups. (a) First image obtained after power injection of gadobenate dimeglumine 0.05 mmol/kg followed with saline reveals a lower right accessory renal artery (arrow) that was correctly detected and graded (no stenosis) by all four observers. (b) First image obtained after power injection of gadobenate dimeglumine 0.1 mmol/kg followed with saline. No stenosis was detected.
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Figure 1b. Coronal three-dimensional time-resolved MR angiograms (4.0/1.65 with 25° flip angle) of the renal arteries in anteroposterior maximum intensity projection images. Differences in SNR were not significant between the two dose groups. (a) First image obtained after power injection of gadobenate dimeglumine 0.05 mmol/kg followed with saline reveals a lower right accessory renal artery (arrow) that was correctly detected and graded (no stenosis) by all four observers. (b) First image obtained after power injection of gadobenate dimeglumine 0.1 mmol/kg followed with saline. No stenosis was detected.
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Figure 2a. Coronal three-dimensional time-resolved MR angiograms (4.0/1.65 with 25° flip angle) of the renal arteries in anteroposterior maximum intensity projection images. Differences in SNR were not significant between the two dose groups. (a) First image obtained after power injection of gadopentetate dimeglumine 0.1 mmol/kg followed with saline reveals hemodynamically nonsignificant stenosis of the left renal artery (right arrow) that was detected and graded correctly by all four observers. The hemodynamically significant stenosis of the right renal artery (left arrow) was detected and graded correctly by all four observers. (b) First image obtained after power injection of gadopentetate dimeglumine 0.2 mmol/kg followed with saline. No stenosis was detected.
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Figure 2b. Coronal three-dimensional time-resolved MR angiograms (4.0/1.65 with 25° flip angle) of the renal arteries in anteroposterior maximum intensity projection images. Differences in SNR were not significant between the two dose groups. (a) First image obtained after power injection of gadopentetate dimeglumine 0.1 mmol/kg followed with saline reveals hemodynamically nonsignificant stenosis of the left renal artery (right arrow) that was detected and graded correctly by all four observers. The hemodynamically significant stenosis of the right renal artery (left arrow) was detected and graded correctly by all four observers. (b) First image obtained after power injection of gadopentetate dimeglumine 0.2 mmol/kg followed with saline. No stenosis was detected.
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Copyright © 2001 by the Radiological Society of North America.
