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Head and Neck MRA at 3.0T

Matt A. Bernstein ¹, John Huston¹

¹Department of Radiology, Mayo Clinic, College of Medicine, Rochester, Minnesota

Publication Name:

Current Protocols in Magnetic Resonance Imaging

Unit Number:

Unit A7.8

DOI:

10.1002/0471142719.mia0708s15

Online Posting Date:

June, 2008

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Abstract

3.0T MRI scanners are becoming more widely used in clinical practice, particularly for neurological applications. The increased signal-to-noise ratio (SNR) provided by 3.0T compared to 1.5T is particularly useful for applications like magnetic resonance angiography (MRA). A protocol to image the intracranial circulation with 3-D time of flight (3DTOF), and a protocol to image the carotid, vertebral, and basilar arteries with contrast-enhanced MRA are presented. The increased SNR at 3.0T is used to increase the spatial resolution. For the 3DTOF exam, the acquisition time is also reduced with the use of parallel imaging.

Keywords: 3T; MRA; head; neck; carotid; Circle of Willis

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Unit Introduction
Basic Protocol 1: Imaging Intracranial Circulation at 3.0T
Basic Protocol 2: Imaging of the Carotid-Vertebral-Basilar System Using Gadolinium Bolus
Commentary
Literature Cited
Figures
Tables

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Materials

Basic Protocol 2: Imaging of the Carotid-Vertebral-Basilar System Using Gadolinium Bolus

Materials

20 ml of gadolinium chelate contrast agent and 50 ml of saline

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Figures

Figure A7.8.1

Transverse full-volume MIP of the intracranial circulation obtained with the 3DTOF as described in Sequence 3 (also see Table A7.8.4).

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Figure A7.8.2

Lateral MIP from the same image set shown in Fig. A7.8.1 from a sub-volume covering the right side.

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Figure A7.8.3

Coronal full-volume MIP of the cervical circulation from the 2D time of flight as described in Sequence 5 (also see Table A7.8.7).

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Figure A7.8.4

Coronal full-volume MIP of the cervical circulation obtained with the gadolinium bolus technique described in Sequence 7 (also see Table A7.8.9).

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Figure A7.8.5

Sub-volume MIPs from the (A) right, (B) posterior, and (C) left portions of the image set shown in Fig. A7.8.3. A stenosis of the basilar artery is indicated (arrow).

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Literature Cited

Literature Cited
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