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Improved Turnaround Times | Median time to first decision: 12 days

Research ArticlePediatric Neuroimaging

Improved Delineation of Ventricular Shunt Catheters Using Fast Steady-State Gradient Recalled-Echo Sequences in a Rapid Brain MR Imaging Protocol in Nonsedated Pediatric Patients

J.H. Miller, T. Walkiewicz, R.B. Towbin and J.G. Curran
American Journal of Neuroradiology March 2010, 31 (3) 430-435; DOI: https://doi.org/10.3174/ajnr.A1866
J.H. Miller
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T. Walkiewicz
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R.B. Towbin
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J.G. Curran
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    Fig 1.

    Rapid nonsedated pediatric brain MR imaging protocol. The upper row contains TSE-T2-weighted MR images. The bottom row has fast SS-GRE MR images. The total imaging time was approximately 150 seconds.

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    Fig 2.

    A representative sample in which SS-GRE is better than TSE-T2 for localizing the ventricular catheter tip. The upper row has TSE-T2-weighted MR images; and the lower row, SS-GRE MR images. The catheter is inserted from a right frontal approach and travels posterolaterally to the left. On TSE-T2-weighted MR images, the exact delineation of the catheter is not certain. On SS-GRE MR images, the entirety of the catheter can be identified with its tip ending in the left posterior periventricular white matter (curved arrow).

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    Fig 3.

    Comparison of fast SS-GRE MR images with standard T2-weighted MR images for localization of the ventricular catheter tip. On the standard T2-weighted MR image and the SS-GRE MR image, the catheter tip is easily identified in the right frontal white matter (curved arrows). The tip is less conspicuous on the faster TSE T2-weighted MR image.

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    Fig 4.

    Comparison of fast SS-GRE MR images with CT for localization of the ventricular catheter tip. The catheter tip is visible within the right frontal horn on CT as well as on SS-GRE MR images (curved arrow). On fast TSE-T2-weighted MR images, the catheter tip is not as readily identified.

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    Fig 5.

    Artifacts secondary to the shunt reservoir. The SS-GRE MR image is the most affected by these artifacts. There are lesser degrees of susceptibility on the fast TSE-T2-weighted and standard T2-weighted MR images, respectively.

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American Journal of Neuroradiology: 31 (3)
American Journal of Neuroradiology
Vol. 31, Issue 3
1 Mar 2010
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Improved Delineation of Ventricular Shunt Catheters Using Fast Steady-State Gradient Recalled-Echo Sequences in a Rapid Brain MR Imaging Protocol in Nonsedated Pediatric Patients
J.H. Miller, T. Walkiewicz, R.B. Towbin, J.G. Curran
American Journal of Neuroradiology Mar 2010, 31 (3) 430-435; DOI: 10.3174/ajnr.A1866
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J.H. Miller, T. Walkiewicz, R.B. Towbin, J.G. Curran
Improved Delineation of Ventricular Shunt Catheters Using Fast Steady-State Gradient Recalled-Echo Sequences in a Rapid Brain MR Imaging Protocol in Nonsedated Pediatric Patients
American Journal of Neuroradiology Mar 2010, 31 (3) 430-435; DOI: 10.3174/ajnr.A1866

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