Motion of the distal renal artery during three‐dimensional contrast‐enhanced breath‐hold MRA

Vasbinder, G. Boudewijn C.; Maki, Jeffrey H.; Nijenhuis, Robbert J.; Leiner, Tim; Wilson, Gregory J.; Kessels, Alfons G.H.; Lemarié, É.; Kaandorp, Dave W.; Ho, Kai Yiu J.A.M.; Engelshoven, Jos M. A. van

doi:10.1002/jmri.10214

Cited by 82 publications

(42 citation statements)

References 26 publications

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“…Blurring artifacts of the renal arteries are a known limitation of conventional MR angiographic acquisitions. Kidney motion propagates to the renal arteries when the patient starts breathing during relatively long MR examinations, and this can detrimentally affect the image quality for the renal arteries (30). It has been shown that the distal segments of the renal arteries move about 10-fold more than do the proximal segments during normal respiration (31).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Aortoiliac and Renal Arteries: MR Angiography with Parallel Acquisition versus Conventional MR Angiography and Digital Subtraction Angiography

Sutter¹,

Nanz²,

Lutz³

et al. 2007

Radiology

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Section: Discussionmentioning

confidence: 99%

Assessment of Aortoiliac and Renal Arteries: MR Angiography with Parallel Acquisition versus Conventional MR Angiography and Digital Subtraction Angiography

Sutter¹,

Nanz²,

Lutz³

et al. 2007

Radiology

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“…However, the previous iterations of this technique were limited in their ability to assess vessels in areas complicated by respiratory motion ( 16 ). Imaging the renal arteries requires a larger fi eld of view and is affected by motion from breathing ( 23 ). Mean renal artery movement during a breathing cycle has been reported to be 1.6 mm 6 1.9 in the proximal and 4.4 mm 6 2.8 in the distal renal arteries ( 24 ).…”

Section: Discussionmentioning

confidence: 99%

Noninvasive Assessment of Transstenotic Pressure Gradients in Porcine Renal Artery Stenoses by Using Vastly Undersampled Phase-Contrast MR Angiography

Bley¹,

Johnson²,

François³

et al. 2011

Radiology

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Purpose:To compare noninvasive transstenotic pressure gradient (TSPG) measurements derived from high -spatial-and temporal-resolution four-dimensional magnetic resonance (MR) fl ow measurements with invasive measurements obtained from endovascular pressure wires with digital subtraction angiographic guidance. Materials and Methods:After Animal Care and Use Committee approval, bilateral renal artery stenosis (RAS) was created surgically in 12 swine. Respiratory-gated phase-contrast vastly undersampled isotropic projection (VIPR) MR angiography of the renal arteries was performed with a 1.5-T clinical MR system (repetition time, 11.4 msec; echo time [fi rst echo], 3.7 msec; 18 000 projection angles; imaging volume, 260 3 260 3 200 mm; acquired isotropic spatial resolution, 1.0 3 1.0 3 1.0 mm; velocity encoding , 150 cm/sec). Velocities measured with phase-contrast VIPR were used to calculate TSPGs by using Navier-Stokes equations. These were compared with endovascular pressure measurements (mean and peak) performed by using fl uoroscopic guidance with regression analysis. Results:In 19 renal arteries with an average stenosis of 62% (range, 0%-87%), there was excellent correlation between the noninvasive TSPG measurement with phase-contrast VIPR and invasive TSPG measurement for mean TSPG ( R 2 = 95 .4%) and strong correlation between noninvasive TSPG and invasive TSPG for the peak TSPG measures ( R 2 = 82.6%). The phase-contrast VIPR-derived TSPG measures were slightly lower than the endovascular measurements. In four arteries with severe stenoses and one occlusion (mean, 86%; range, 75%-100%), the residual lumen within the stenosis was too small to determine TSPG with phasecontrast VIPR. Conclusion:The unenhanced MR angiographic technique with phasecontrast VIPR allows for accurate noninvasive assessment of hemodynamic signifi cance in a porcine model of RAS with highly accurate TSPG measurements.

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“…While theoretical predictions suggest that greater improvement in FWHM may be obtained with longer scan times, such lengthening of time may not be appropriate for thoraco-abdominal CE-MRA acquisitions due to respiratory motion. Other factors, such as intrinsic motion of the renal arteries associated with cardiac pulsation and diaphragmatic drift during the breath-hold (39,40), may play an important role in limiting the achievable spatial resolution with CE-MRA, and other motion-compensated renal artery angiographic techniques may need to be evaluated (41)(42)(43)(44).…”

Section: Resolution Considerationsmentioning

confidence: 99%

Direct comparison of sensitivity encoding (SENSE) accelerated and conventional 3D contrast enhanced magnetic resonance angiography (CE‐MRA) of renal arteries: Effect of increasing spatial resolution

Muthupillai

Douglas

Huber

et al. 2009

Magnetic Resonance Imaging

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Purpose: To assess the effect of attaining higher spatial resolution in contrast-enhanced magnetic resonance angiography (MRA) of renal arteries using parallel imaging, sensitivity encoding (SENSE), by comparing the SENSE contrast-enhanced (CE) MRA against a conventional CE-MRA protocol with identical scan times, injection protocol, and other acquisition parameters. Materials and Methods:Numerical simulations and a direct comparison of SENSE-accelerated versus conventional acquisitions were performed. A total of 41 patients (18 male) were imaged using both protocols for a direct comparison. Both protocols used fluoroscopic triggering, centric encoding, breath-holding, equivalent injection protocol, and lasted %30 seconds.Results: Simulated point-spread functions were narrower for the SENSE protocol compared to the conventional protocol. In the patient study, although the SENSE protocol produced images with lower signal-to-noise ratio (SNR), image quality was better for all segments of the renal arteries. In addition, ringing of kidney parenchyma and renal artery blurring were significantly reduced in the SENSE protocol. Finally, reader confidence improved with the SENSE protocol.Conclusion: Despite a reduction in SNR, the higher-resolution SENSE CE-MRA provided improved image quality, reduced artifacts, and increased reader confidence compared to the conventional protocol.

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Motion of the distal renal artery during three‐dimensional contrast‐enhanced breath‐hold MRA

Abstract: The observed cranial motion of the kidneys during a breath-hold adversely affects distal renal artery image quality on three-dimensional CE-MRA and jeopardizes reliable clinical evaluation. Shortening scan time may be beneficial for decreasing image degradation caused by this phenomenon.

Cited by 82 publications

References 26 publications

Assessment of Aortoiliac and Renal Arteries: MR Angiography with Parallel Acquisition versus Conventional MR Angiography and Digital Subtraction Angiography

Assessment of Aortoiliac and Renal Arteries: MR Angiography with Parallel Acquisition versus Conventional MR Angiography and Digital Subtraction Angiography

Noninvasive Assessment of Transstenotic Pressure Gradients in Porcine Renal Artery Stenoses by Using Vastly Undersampled Phase-Contrast MR Angiography

Direct comparison of sensitivity encoding (SENSE) accelerated and conventional 3D contrast enhanced magnetic resonance angiography (CE‐MRA) of renal arteries: Effect of increasing spatial resolution

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