Peripheral MR Angiography

Ersoy, Hale; Zhang, HongLei; Prince, Martin R.

doi:10.1080/10976640600604963

Cited by 25 publications

(6 citation statements)

References 46 publications

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“…Lower-extremity MRA is typically associated with the highest contrast dose protocols of all MR imaging techniques, often requiring a double-dose (0.2 mmol/kg) or more of Gd-contrast to be administered [14]. It has been shown that the amount of Gd-contrast needed at 3.0T for lower extremity MRA can be reduced up to one-third of that used at 1.5T (i.e.…”

Section: Introductionmentioning

confidence: 99%

Magnetic resonance angiography: current status and future directions

Hartung

Grist

François

2011

Journal of Cardiovascular Magnetic Resonance

170

113

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With recent improvement in hardware and software techniques, magnetic resonance angiography (MRA) has undergone significant changes in technique and approach. The advent of 3.0 T magnets has allowed reduction in exogenous contrast dose without compromising overall image quality. The use of novel intravascular contrast agents substantially increases the image windows and decreases contrast dose. Additionally, the lower risk and cost in non-contrast enhanced (NCE) MRA has sparked renewed interest in these methods. This article discusses the current state of both contrast-enhanced (CE) and NCE-MRA. New CE-MRA methods take advantage of dose reduction at 3.0 T, novel contrast agents, and parallel imaging methods. The risks of gadolinium-based contrast media, and the NCE-MRA methods of time-of-flight, steady-state free precession, and phase contrast are discussed.

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Section: Introductionmentioning

confidence: 99%

Magnetic resonance angiography: current status and future directions

Hartung

Grist

François

2011

Journal of Cardiovascular Magnetic Resonance

170

113

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“…However, since the 2D slice thickness is typically larger (!3 mm) than the slice resolution of 3D TOF ( 1 mm), the 2D TOF approach is commonly used only for angiography of large gauge vessels. Often, the 2D slices are acquired with some overlap to reduce the discontinuities at the slice edges in a maximum intensity projection (MIP) depiction of the data-often called the ''stairstep artifact'' (40,41). This 2D overlap reduces the coverage efficiency of the technique.…”

Section: Descriptionmentioning

confidence: 99%

Non‐contrast enhanced MR angiography: Physical principles

Wheaton

Miyazaki

2012

Magnetic Resonance Imaging

140

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Noncontrast‐enhanced magnetic resonance angiography (NCE‐MRA) methods have been demonstrated in anatomies throughout the body. Previously established NCE‐MRA techniques suffered from long scan times or low sensitivity. Advances in hardware and software have made NCE‐MRA scan times clinically feasible. Recent concerns over the safety of gadolinium‐based contrast material combined with the expense of the material and its administration have generated a demand for NCE‐MRA. In response, several new NCE‐MRA methods have been developed. The physical mechanisms underlying five general classes of NCE‐MRA methods (inflow effect, flow‐dependency on cardiac phase, flow‐encoding, spin labeling, and relaxation) are explained. The original techniques of time‐of‐flight (TOF) and phase contrast MRA (PC‐MRA) are briefly introduced. New developments in NCE‐MRA, including hybrid of opposite‐contrast (HOP‐MRA), four dimensional PC‐MRA (4D Flow), cardiac‐gated 3D fast‐spin‐echo, flow‐sensitive dephasing (FSD), arterial spin labeling (ASL), and balanced steady‐state free‐precession (bSSFP) are highlighted. The primary applications, advantages, and limitations of established and emerging NCE‐MRA techniques are discussed. J. Magn. Reson. Imaging 2012;36:286–304. © 2012 Wiley Periodicals, Inc.

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“…[ 10 11 ] The accuracy of 3D gadolinium-enhanced-MRA in showing and grading peripheral vascular diseases was evaluated, and a sensitivity of 92% and specificity of 91% was determined. [ 12 ] Meta-analyses and systematic reviews support the diagnostic accuracy of MRA when compared to digital subtraction angiography (DSA). [ 13 14 ] Owenet al showed that MRA is superior to DSA in the detection of outflow vessels suitable for distal bypass in patients with CLI.…”

Section: Discussionmentioning

confidence: 99%

A Factor Increasing Venous Contamination on Bolus Chase Three-dimensional Magnetic Resonance Imaging: Charcot Neuroarthropathy

Çildağ

Ertuğrul

Köseoğlu

et al. 2018

Journal of Clinical Imaging Science

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Background:The study aimed to evaluate the ratio of venous contamination in diabetic cases without foot lesion, with foot lesion and with Charcot neuroarthropathy (CN).Materials and Methods:Bolus-chase three-dimensional magnetic resonance (MR) of 396 extremities of patients with diabetes mellitus was analyzed, retrospectively. Extremities were divided into three groups as follows: diabetic patients without foot ulcer or Charcot arthropathy (Group A), patients with diabetic foot ulcers (Group B) and patients with CN accompanying diabetic foot ulcers (Group C). Furthermore, amount of venous contamination classified as no venous contamination, mild venous contamination, and severe venous contamination. The relationship between venous contamination and extremity groups was investigated.Results:Severe venous contamination was seen in Group A, Group B, and Group C, 5.6%, 15.2%, and 34.1%, respectively. Statistically significant difference was seen between groups with regard to venous contamination.Conclusion:Venous contamination following bolus chase MR was higher in patients with CN.

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Peripheral MR Angiography

Cited by 25 publications

References 46 publications

Magnetic resonance angiography: current status and future directions

Magnetic resonance angiography: current status and future directions

Non‐contrast enhanced MR angiography: Physical principles

A Factor Increasing Venous Contamination on Bolus Chase Three-dimensional Magnetic Resonance Imaging: Charcot Neuroarthropathy

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