Journalartikel

Jahr der Veröffentlichung: 2013

Seiten: 1646-1657

Zeitschrift: CardioVascular and Interventional Radiology

Bandnummer: 36

Heftnummer: 6

ISSN: 0174-1551

eISSN: 1432-086X

DOI Link: https://doi.org/10.1007/s00270-013-0616-0

Verlag: Springer

Abstract: 

This study was designed to systematically investigate artifacts caused by interventional needles recommended for use in MRI, with focus on field strength, needle/mandrin type, orientation and sequence.

Eight different MRI compatible needles were placed in porcine tissue and examined at 1.5 and 3.0 T with balanced-steady-state-free-precession (B-SSFP) and T1-weighted-spoiled-gradient-echo (T1-SPGR) sequences in different orientations to B-0. Artifact diameters with regards to the primary, inner, and secondary, outer artifacts were assessed and statistically evaluated.

The types and degree of artifacts varied considerably, especially between different mandrin types even for the same needles. Orientation of the needle in the magnetic field was another main contributor to the artifact dimensions. Less important factors were the type of pulse sequence and field strength. Artifacts ranged from 0.7 mm (steel, 0A degrees, B-SSFP, 3.0 T, inner) to 71.4 mm (nitinol, 90A degrees, B-SSFP, 1.5 T, outer). Inner artifact diameters in B-SSFP were slightly larger (8.2 +/- A 5.7 mm) than those in T1-SPGR (7.6 +/- A 5.4 mm) and comparable between 1.5 and 3.0 T (e.g., 8.0 vs. 8.4 mm, B-SSFP).

Although all were sold as "MR compatible," the artifacts differed greatly between needle types, and even more so for different mandrins. The results suggest an empirical approach to the needle choice based on lesion type and approach angle.

Harvard-Zitierstil: Penzkofer, T., Peykan, N., Schmidt, K., Krombach, G. and Kuhl, C. (2013) How MRI Compatible is "MRI Compatible"? A Systematic Comparison of Artifacts Caused by Biopsy Needles at 3.0 and 1.5 T, CardioVascular and Interventional Radiology, 36(6), pp. 1646-1657. https://doi.org/10.1007/s00270-013-0616-0

APA-Zitierstil: Penzkofer, T., Peykan, N., Schmidt, K., Krombach, G., & Kuhl, C. (2013). How MRI Compatible is "MRI Compatible"? A Systematic Comparison of Artifacts Caused by Biopsy Needles at 3.0 and 1.5 T. CardioVascular and Interventional Radiology. 36(6), 1646-1657. https://doi.org/10.1007/s00270-013-0616-0