Nonenhanced extracranial carotid MR angiography using arterial spin labeling: Improved performance with pseudocontinuous tagging

Koktzoglou, Ioannis; Gupta, Navyash; Edelman, Robert R.

doi:10.1002/jmri.22628

Cited by 26 publications

(19 citation statements)

References 31 publications

(63 reference statements)

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“…Hybrid ASL (hASL) [187] is a new sequence that has been successfully applied to neurovascular MRA (Fig. 19) and is of crucial interest in pediatric subjects where non-contrastenhanced techniques must always be preferred.…”

Section: D Tse Sequence (Space)mentioning

confidence: 99%

State-of-the-art MRI techniques in neuroradiology: principles, pitfalls, and clinical applications

et al. 2015

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This article reviews the most relevant state-of-the-art magnetic resonance (MR) techniques, which are clinically available to investigate brain diseases. MR acquisition techniques addressed include notably diffusion imaging (diffusion-weighted imaging (DWI), diffusion tensor imaging (DTI), and diffusion kurtosis imaging (DKI)) as well as perfusion imaging (dynamic susceptibility contrast (DSC), arterial spin labeling (ASL), and dynamic contrast enhanced (DCE)). The underlying models used to process these images are described, as well as the theoretic underpinnings of quantitative diffusion and perfusion MR imaging-based methods. The technical requirements and how they may help to understand, classify, or follow-up neurological pathologies are briefly summarized. Techniques, principles, advantages but also intrinsic limitations, typical artifacts, and alternative solutions developed to overcome them are discussed. In this article, we also review routinely available three-dimensional (3D) techniques in neuro MRI, including state-of-the-art and emerging angiography sequences, and briefly introduce more recently proposed 3D quantitative neuro-anatomy sequences, and new technology, such as multi-slice and multi-transmit imaging.

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Section: D Tse Sequence (Space)mentioning

confidence: 99%

State-of-the-art MRI techniques in neuroradiology: principles, pitfalls, and clinical applications

et al. 2015

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“…A recently described nonsubtractive unenhanced MR angiographic technique called quiescent interval single shot shows minimal sensitivity to patient motion and cardiac arrhythmias and has been found to demonstrate peripheral arterial disease with accuracy comparable to that of contrastenhanced MR angiography (Fig 14) (151-153). Pseudocontinuous arterial spin-labeling techniques, which hitherto were primarily used for measurement of brain perfusion, have shown promise for unenhanced MR angiography of the head and neck (154,155).…”

Section: S193mentioning

confidence: 99%

The History of MR Imaging as Seen through the Pages ofRadiology

Edelman¹

2014

Radiology

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112

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The first reports in Radiology pertaining to magnetic resonance (MR) imaging were published in 1980, 7 years after Paul Lauterbur pioneered the first MR images and 9 years after the first human computed tomographic images were obtained. Historical advances in the research and clinical applications of MR imaging very much parallel the remarkable advances in MR imaging technology. These advances can be roughly classified into hardware (eg, magnets, gradients, radiofrequency [RF] coils, RF transmitter and receiver, MR imaging-compatible biopsy devices) and imaging techniques (eg, pulse sequences, parallel imaging, and so forth). Image quality has been dramatically improved with the introduction of high-field-strength superconducting magnets, digital RF systems, and phased-array coils. Hybrid systems, such as MR/positron emission tomography (PET), combine the superb anatomic and functional imaging capabilities of MR imaging with the unsurpassed capability of PET to demonstrate tissue metabolism. Supported by the improvements in hardware, advances in pulse sequence design and image reconstruction techniques have spurred dramatic improvements in imaging speed and the capability for studying tissue function. In this historical review, the history of MR imaging technology and developing research and clinical applications, as seen through the pages of Radiology, will be considered.

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“…Also, a previous study in 3D ASL-MRA has shown that substantially higher arterial signal was obtained by pCASL than PASL. 40 However, a dilemma shows up when using pCASL for dynamic MRA: because of its long labeling duration, the earliest labeled blood has already reached the distal arteries even for the first phase acquired immediately after the end of the labeling, thereby making it difficult to depict the early inflow phases ( Fig. 5b), which are easily depicted by PASL.…”

Section: Labeling Module (General)mentioning

confidence: 99%

Intracranial 3D and 4D MR Angiography Using Arterial Spin Labeling: Technical Considerations

2020

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In the 1980's some of the earliest studies of arterial spin labeling (ASL) MRI have demonstrated its ability to generate MR angiography (MRA) images. Thanks to many technical improvements, ASL has been successfully moving its position from the realm of research into the clinical area, albeit more known as perfusion imaging than as MRA. For MRA imaging, other techniques such as time-of-flight, phase contrast MRA and contrast-enhanced (CE) MRA are more popular choices for clinical applications. In the last decade, however, ASL-MRA has been experiencing a remarkable revival, especially because of its non-invasive nature, i.e. the fact that it does not rely on the use of contrast agent. Very importantly, there are additional benefits of using ASL for MRA. For example, its higher flexibility to achieve both high spatial and temporal resolution than CE dynamic MRA, and the capability of vessel specific visualization, in which the vascular tree arising from a selected artery can be exclusively visualized. In this article, the implementation and recent developments of ASL-based MRA are discussed; not only focusing on the basic sequences based upon pulsed ASL or pseudo-continuous ASL, but also including more recent labeling approaches, such as vessel-selective labeling, velocity-selective ASL, vessel-encoded ASL and time-encoded ASL. Although these ASL techniques have been already utilized in perfusion imaging and their usefulness has been suggested by many studies, some additional considerations should be made when employing them for MRA, since there is something more than the difference of the spatial resolution of the readout sequence. Moreover, extensive discussion is included on what readout sequence to use, especially by highlighting how to achieve high spatial resolution while keeping scan-time reasonable such that the ASL-MRA sequence can easily be included into a clinical examination.

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Nonenhanced extracranial carotid MR angiography using arterial spin labeling: Improved performance with pseudocontinuous tagging

Cited by 26 publications

References 31 publications

State-of-the-art MRI techniques in neuroradiology: principles, pitfalls, and clinical applications

State-of-the-art MRI techniques in neuroradiology: principles, pitfalls, and clinical applications

The History of MR Imaging as Seen through the Pages ofRadiology

Intracranial 3D and 4D MR Angiography Using Arterial Spin Labeling: Technical Considerations

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