Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1999 Feb;20(2):263-6.

Use of three-dimensional MR angiography for tracking a contrast bolus in the carotid artery

E R Melhem  1 , S D Caruthers, S G Faddoul, R Tello, H Jara
Affiliations

Use of three-dimensional MR angiography for tracking a contrast bolus in the carotid artery

E R Melhem et al. AJNR Am J Neuroradiol. 1999 Feb.

Abstract

Contrast-bolus tracking in the carotid bifurcation was accomplished using an MR angiographic technique with a 3D turbo field-echo readout (TR/TE = 6/3, flip angle = 50 degrees) modified by a keyhole scheme. Optimal visibility of the contrast bolus was achieved by digital subtraction from a reference volume. This technique reliably time-resolves the carotid arteries from the jugular veins.

PubMed Disclaimer

Figures

<sc>fig</sc> 1.
fig 1.
MIP projections of six of 20 temporally resolved volumes acquired from a male volunteer using subtracted 3D dynamic keyhole turbo field-echo MR angiography (TR/TE = 6/3, flip angle = 50°) show a coronal view of the vessels in the head and neck. The early phases show the aortic arch and major branches, the carotid arteries and bifurcations, and the vertebrobasilar arteries without interference from veins. The later phases show the arteries and the internal jugular veins
<sc>fig</sc> 2.
fig 2.
Rotated MIP projections of the eighth dynamic volume (arterial phase) acquired from a male volunteer using 3D dynamic keyhole turbo field-echo MR angiography (TR/TE = 6/3, flip angle = 50°). The nonsubtracted (top row) and the subtracted (bottom row) images show the aortic arch and major branches, the carotid arteries and bifurcations, and the vertebrobasilar arteries without interference from veins. Note the improved contrast between the arteries and background on the subtracted images
<sc>fig</sc> 3.
fig 3.
Rotated targeted MIP projections of the ninth dynamic volume (arterial phase) acquired from a female volunteer using subtracted 3D dynamic keyhole turbo field-echo MR angiography (TR/TE = 6/3, flip angle = 50°) show a normal left carotid bifurcation without interference from veins.
<sc>fig</sc> 4.
fig 4.
A, MIP projection of the left carotid bifurcation acquired from a female patient with suspected moderate narrowing (arrow) using 2D TOF MR angiography (TR/TE = 22/7, flip angle = 60°). B, The MIP projection acquired using subtracted 3D dynamic keyhole turbo field-echo MR angiography (TR/TE = 6/3, flip angle = 50°) shows a patent left carotid bifurcation.
See this image and copyright information in PMC

Comment in

References

    1. Mayberg MR, Winn HR. Endarterectomy for asymptomatic carotid artery stenosis: resolving the controversy. JAMA 1995;273:1459-1461 - PubMed
    1. Masaryk AM, Ross JS, DiCello MC, et al. 3DFT MR angiography of the carotid bifurcation: potential and limitations as a screening examination. Radiology 1991;179:797-804 - PubMed
    1. Blatter DD, Bahr AL, Parker DL, et al. Cervical carotid MR angiography with multiple overlapping thin-slab acquisition: comparison with conventional angiography. AJR Am J Roentgenol 1993;161:1269-1277 - PubMed
    1. Urchuk SN, Plewes DB. Mechanisms of flow-induced signal loss in MR angiography. J Magn Reson Imaging 1992;2:453-462 - PubMed
    1. Lin W, Haake EM, Smith AS. Lumen definition in MR angiography.. J Magn Reson Imaging 1991;1:327-336 - PubMed

Publication types

LinkOut - more resources