3D MR angiography with ramp-shaped flip-angle distribution

1996 ◽  
Vol 6 (4) ◽  
Author(s):  
J. Martos ◽  
T. N�gele ◽  
U. Klose ◽  
D. Petersen ◽  
K. Voigt
Keyword(s):  
Mr Angiography ◽  
Flip Angle ◽  
Angle Distribution

Unenhanced calf MR angiography at 3.0 T using electrocardiography-gated partial-fourier fast spin echo imaging with variable flip angle

2010 ◽  
Vol 21 (6) ◽  
pp. 1311-1322 ◽  
Author(s):  
Dan Li ◽  
Jiang Lin ◽  
Fuhua Yan ◽  
Qingyuan Wu ◽  
Weiwei Lv ◽  
...  
Keyword(s):  
Mr Angiography ◽  
Spin Echo ◽  
Flip Angle ◽  
Fast Spin Echo ◽  
Variable Flip Angle ◽  
3.0 T ◽  
Fast Spin

scholarly journals Crossover comparison of ferumoxytol and gadobenate dimeglumine for abdominal MR-angiography at 3.0 tesla: Effects of contrast bolus length and flip angle

2016 ◽  
Vol 45 (6) ◽  
pp. 1617-1626 ◽  
Author(s):  
Tilman Schubert ◽  
Utaroh Motosugi ◽  
Sonja Kinner ◽  
Timothy J. Colgan ◽  
Samir D. Sharma ◽  
...  
Keyword(s):  
Mr Angiography ◽  
Gadobenate Dimeglumine ◽  
Flip Angle ◽  
3.0 Tesla ◽  
Contrast Bolus ◽  
Crossover Comparison

Optimization of Flip Angle at Head & Neck MR Angiography using Gadoteridol

2016 ◽  
Vol 53 (3) ◽  
pp. 151-159
Author(s):  
Hyunkeun Jeong ◽  
Mingi Kim ◽  
Jaejun Song ◽  
Kichang Nam ◽  
Hyunsung Choi ◽  
...  
Keyword(s):  
Mr Angiography ◽  
Flip Angle ◽  
Head Neck

Flow-compensated limited flip angle MR angiography

1989 ◽  
Vol 12 (1) ◽  
pp. 1-13 ◽  
Author(s):  
James N. Lee ◽  
Stephen J. Riederer ◽  
Norbert J. Pelc
Keyword(s):  
Mr Angiography ◽  
Flip Angle

Improved MR angiography: magnetization transfer suppression with variable flip angle excitation and increased resolution.

Radiology ◽  
1994 ◽  
Vol 190 (3) ◽  
pp. 890-894 ◽  
Author(s):  
D Atkinson ◽  
M Brant-Zawadzki ◽  
G Gillan ◽  
D Purdy ◽  
G Laub
Keyword(s):  
Mr Angiography ◽  
Magnetization Transfer ◽  
Flip Angle ◽  
Variable Flip Angle

High Resolution Contrast-Enhanced MR Angiography in the Evaluation of Rabbit Carotid Artery

2005 ◽  
Vol 18 (5-6) ◽  
pp. 529-536
Author(s):  
R.-H. Wu ◽  
D.F. Kallmes
Keyword(s):  
High Resolution ◽  
Image Quality ◽  
Carotid Artery ◽  
Mr Angiography ◽  
Flip Angle ◽  
Acquisition Time ◽  
Pixel Size ◽  
Rabbit Carotid Artery ◽  
Contrast Enhanced ◽  
Venous Contamination

This study compared a high resolution contrast-enhanced MR angiography (MRA) sequence to conventional contrast-enhanced MRA sequence for imaging of rabbit carotid artery. Fifteen rabbits underwent an evaluation using both high resolution contrast-enhanced MRA sequence and conventional contrast-enhanced MRA sequence. Siemens 1.5 Tesla Magnetom Vision system was utilized. The parameters of high resolution sequence were: TR/TE= 6.2/2.0 msec, flip angle 25°, matrix 130×512, pixel size 0.96×0.49 mm, partition thickness 1.58 mm, acquisition time 24 sec. The parameters of conventional sequence were: TR/TE=3.8/1.4 msec, flip angle 35°, matrix 110×256, pixel size 1.48×1.02 mm, partition thickness 2mm, acquisition time 10 sec. Maximum intensity projection (MIP) images were created. Both original single slices and MIP images were used for image quality evaluation. Contrast-to-noise ratio (CNR), signal-to-noise ratio (SNR), distinctness of artery edge, and venous contamination were analyzed for both techniques. Higher average CNR and SNR were obtained with high resolution contrast-enhanced MRA, compared to average CNR and SNR with conventional contrast-enhanced MRA. The differences were statistically significant (P<0.01). The artery edge with high resolution method was more distinct than conventional method. Jugular venous contamination was found in five of 15 cases with high resolution contrast-enhanced MRA and in four of 15 cases with conventional contrast-enhanced MRA. High resolution contrast-enhanced MRA has significant potential for high quality noninvasive vascular imaging. The image quality with high resolution contrast-enhanced MRA sequence is better than conventional contrast-enhanced MRA sequence.

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