Renal artery stenosis: comparative assessment by unenhanced renal artery mra versus contrast-enhanced MRA

Khoo, Michael; Deeab, Dhafer; Gedroyc, Wladyslaw; Duncan, Neill; Taube, David; Dick, Elizabeth

doi:10.1007/s00330-011-2086-6

Cited by 36 publications

(17 citation statements)

References 19 publications

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“…From the analysis of our series and also from the literature, NC-MRA has proved to be superior to CE-MRA in identifying intraparenchymal arterial branches (22,24,28) due to the high signal to noise ratio that characterizes the SSFP sequence (9). Also Xu et al reported a better visualization of intraparenchymal branches in comparison with CTA (26); however, if the renal artery trunk is affected by a severe stenosis, the consequent signal loss downstream the stenosis can lead to poor visualization of peripheral branches (26,27).…”

Section: Discussionmentioning

confidence: 95%

Non-enhanced MR angiography of renal arteries: comparison with contrast-enhanced MR angiography

Angeretti¹,

Lumia²,

Canì³

et al. 2013

Acta Radiol

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Section: Discussionmentioning

confidence: 95%

Non-enhanced MR angiography of renal arteries: comparison with contrast-enhanced MR angiography

Angeretti¹,

Lumia²,

Canì³

et al. 2013

Acta Radiol

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“…[678] The NC MRA technique of ASL with 3D SSFP sequence has been evaluated in some recent studies to assess renal vascular anatomy and has produced promising results. [2122] In the current study, we compared Inhance Inflow IR Renal MRA, basically ASL with 3D SSFP sequence and CTA in preoperative renal donors evaluation.…”

Section: Discussionmentioning

confidence: 99%

“…The SSFP technique was used because the previous studies demonstrated that in addition to a high SNR, this sequence bears intrinsically high (T2-like) contrast between the blood pool and soft tissue. [141516171819202122] SSFP imaging is supposed to be flow compensated in all three spatial coordinates due to the symmetric shape of the gradient pulses. [1823] The application of an SS inversion prepulse as used in this study resulted in a good signal suppression of static tissue and veins, which allowed the selective visualization of the renal arteries without the use of any contrast medium application.…”

Section: Discussionmentioning

confidence: 99%

Comparison of computed tomographic angiography and noncontrast magnetic resonance angiography in preoperative evaluation of living renal donors

et al. 2017

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Introduction:The computed tomographic angiography (CTA) renal donor protocol is an established method of preoperative renal vascular pedicle evaluation in prospective renal donors. However, CTA is associated with significant radiation exposure and intravenous contrast administration. The newer noncontrast-enhanced magnetic resonance angiography (NCE-MRA) techniques, especially arterial spin labeling (ASL) with steady-state free precession (SSFP) hold promise as an effective alternative. We prospectively compared CTA with NCE MRA for accuracy in the evaluation of renal arterial anatomy in prospective renal donors.Methods:A total of 43 subjects underwent CTA followed by NCE MRA in a prospective comparative study. The number of renal arteries and early branching of renal arteries were noted in both kidneys in all subjects. Intermodality agreement was calculated using “K” (Kappa) statistics and 95% confidence interval for both modalities.Results:A total of 63 single, 21 double, and 2 triple arteries were detected in 43 subjects on CTA. CTA showed an early branch in 17 kidneys. NCE MRAshowed 64 single arteries, 20 double arteries, and 2 triple arteries. A total of 14 kidneys showed an early branch. Unweighted Kappa statistic of agreement between CTA and NCE MRA for number of renal arteries and for frequency of early branching was 0.9707 and 0.8822, respectively.Conclusions:The newer NCE MRA techniques such as ASL with SSFP among others are potential alternatives for CTA, in the evaluation of prospective renal donors.

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“…Magnetic Resonance Angiography (MRA) is a noninvasive imaging modality that has been widely used for stenosis detection and screening [1,3].…”

Section: Introductionmentioning

confidence: 99%

GroBa: Growing balloons for calibre measurement on stenotic lumens

Perez-Rovira

Trucco

Weir‐McCall

et al. 2012

2012 25th IEEE International Symposium on Computer-Based Medical Systems (CBMS)

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This papers describes GroBa, a new lumen calibre measurement technique based on growing balloons. GroBa presents the advantages of cross-sectional based methods, as it is able to cope with irregular, non-tubular vessel structures, such as stenosis or aneurysms, but at the same time it is able to obtain precise calibre measurements even when the estimated centrelines are not accurate. Experimental results using phantoms and real subtracted full-body magnetic resonance angiograms show the potential of this work. GroBa is integrated into a fully automatic system that segments the vasculature, obtains its centrelines, measures the lumen calibre at each detected artery, and presents the calibre information in false colours in the maximum intensity projection exploiting the HSV colour-space; all without any human intervention.

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Renal artery stenosis: comparative assessment by unenhanced renal artery mra versus contrast-enhanced MRA

Cited by 36 publications

References 19 publications

Non-enhanced MR angiography of renal arteries: comparison with contrast-enhanced MR angiography

Non-enhanced MR angiography of renal arteries: comparison with contrast-enhanced MR angiography

Comparison of computed tomographic angiography and noncontrast magnetic resonance angiography in preoperative evaluation of living renal donors

GroBa: Growing balloons for calibre measurement on stenotic lumens

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