Visualization of external carotid artery and its branches: Non–contrast‐enhanced MR angiography using balanced steady‐state free‐precession sequence and a time‐spatial labeling inversion pulse

Satogami, Naoe; Okada, Tomohisa; Koyama, Takashi; Gotoh, Kazuo; Kamae, Toshikazu; Togashi, Kaori

doi:10.1002/jmri.21883

Cited by 20 publications

(9 citation statements)

References 20 publications

(24 reference statements)

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“…The subtraction has the advantage of completely removing the background tissue signal. ASL has been proposed for MR angiographic applications in the cerebral vasculature and renal arteries (16)(17)(18)(19)(20)(21)(22)(23)(24)(25). Furthermore, spin-labeling approaches have been used to assess hemodynamic function, including infl ow in the vessels and arrival times to the tissue ( 26 ).…”

Section: Methodsmentioning

confidence: 99%

Time-resolved Vessel-selective Digital Subtraction MR Angiography of the Cerebral Vasculature with Arterial Spin Labeling

et al. 2010

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Purpose:To demonstrate an arterial spin-labeling (ASL) magnetic resonance (MR) angiographic technique that covers the entire cerebral vasculature and yields transparent-background, time-resolved hemodynamic, and vessel-specifi c information similar to that obtained with x-ray digital subtraction angiography (DSA) without the use of exogenous contrast agents. Materials and Methods:Prior institutional review board approval and written informed consent were obtained for this HIPAA-compliant study in which 12 healthy volunteers (fi ve women, seven men; age range, 21-62 years; average age, 28 years) underwent imaging. An ASL technique in which variable labeling durations are used to acquire hemodynamic infl ow information and a vessel-selective pulsed-continuous ASL technique were tested. Region-of-interest signal intensities in various vessel segments were averaged across subjects and used to quantitatively compare images. For comparison, a standard time of fl ight (TOF) acquisition was performed in the circle of Willis. Results:Infl ow temporal resolution of 200 msec was demonstrated, revealing arterial transit times of 750, 950, and 1100 msec to consecutive segments of the middle cerebral artery from distal to the circle of Willis to deep regions of the midbrain. Selective labeling resulted in an average of eightfold suppression of contralateral vessels relative to the labeled vessel. Signal-to-noise ratios and contrast-to-noise ratios on maximum intensity projection images obtained with 88-second volumetric acquisitions (60 6 15 [standard deviation] and 57 6 15, respectively) and 11-second single-projection acquisitions (19 6 5 and 17 6 5, respectively) were comparable with standard TOF acquisitions, in which a 2.7-fold longer imaging duration for a 2.6-fold lower pixel area was used. Normal variations of the vasculature were identifi ed with ASL angiography. Conclusion:ASL angiography can be used to acquire hemodynamic vessel-specifi c information similar to that obtained with x-ray DSA.q RSNA, 2010

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Section: Methodsmentioning

confidence: 99%

Time-resolved Vessel-selective Digital Subtraction MR Angiography of the Cerebral Vasculature with Arterial Spin Labeling

et al. 2010

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“…Lanzman et al also reported that this approach provided high sensitivity (100%) and high specificity (88%) for the detection of transplant renal artery stenoses (56). SSFP angiography with ASL is also used for the portal vein (Fig 19) (57) and head and neck arteries (58). Images of the hepatic vein and inferior vena cava can also be obtained by using another slab-selective IR pulse (59).…”

Section: Asl With Ssfp Techniquementioning

confidence: 96%

Unenhanced MR Angiography: Techniques and Clinical Applications in Patients with Chronic Kidney Disease

Morita¹,

Masukawa²,

Suzuki³

et al. 2011

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Alongside the two conventional unenhanced magnetic resonance (MR) angiographic techniques, namely time-of-flight and phase-contrast MR angiography, several novel techniques have since been developed, including electrocardiograph (ECG)-gated fast spin echo (FSE), steady-state free precession (SSFP), and arterial spin labeling. These techniques are increasingly being used to avoid severe complications caused by contrast materials, such as iodinated contrast material-induced nephropathy and gadolinium-induced nephrogenic systemic fibrosis. However, image acquisition and interpretation with these techniques are more complicated than with contrast-enhanced MR angiography because of numerous types of artifacts. Appropriate use of these techniques can allow diagnosis of vascular diseases in patients with chronic kidney disease without using contrast materials. For example, time-of-flight angiography is the main technique for evaluating intracranial arteries. Phase-contrast imaging is increasingly being used for physiologic evaluation rather than morphologic evaluation. Meanwhile, ECG-gated FSE MR angiography can show peripheral arteries in more detail. SSFP MR angiography with or without arterial spin labeling can provide high-resolution images of blood vessels including renal arteries, the aorta, and coronary arteries. Black-blood imaging is also used to evaluate vessel walls and intravascular abnormalities including plaque, dissection, and thrombi. The authors review the principles of the currently available unenhanced MR angiographic techniques, along with their advantages and limitations, and describe their clinical applications. This article should help readers select the most appropriate unenhanced MR angiographic technique to assess vascular diseases in patients with chronic kidney disease. Supplemental material available at http://radiographics.rsna.org/lookup/suppl/doi:10.1148/rg.312105075/-/DC1.

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“…As a consequence, the leading edge of the created blood bolus might have already entered the imaging volume at the time of acquisition of the first dynamic. Pulsed ASL methods may overcome this limitation, as a blood bolus is created by the inversion of a large blood volume at once proximal to the image region [15,31,32], however, spatial selectivity is restricted.…”

Section: Discussionmentioning

confidence: 97%

3D time-resolved vessel-selective angiography based on pseudo-continuous arterial spin labeling

Lindner¹,

Jensen‐Kondering²,

Osch

et al. 2015

Magnetic Resonance Imaging

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Visualization of external carotid artery and its branches: Non–contrast‐enhanced MR angiography using balanced steady‐state free‐precession sequence and a time‐spatial labeling inversion pulse

Cited by 20 publications

References 20 publications

Time-resolved Vessel-selective Digital Subtraction MR Angiography of the Cerebral Vasculature with Arterial Spin Labeling

Time-resolved Vessel-selective Digital Subtraction MR Angiography of the Cerebral Vasculature with Arterial Spin Labeling

Unenhanced MR Angiography: Techniques and Clinical Applications in Patients with Chronic Kidney Disease

3D time-resolved vessel-selective angiography based on pseudo-continuous arterial spin labeling

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