Cranial surgery with an expanded compact intraoperative magnetic resonance imager. Technical note

Journal of Neurosurgery
M SchulderP W Carmel

Abstract

In this article the authors report the implementation of an expanded compact intraoperative magnetic resonance (iMR) imager that is designed to overcome significant limitations of an earlier unit. The PoleStar N20 iMR imager has a stronger magnetic field than its predecessor (0.15 tesla compared with 0.12 tesla), a wider gap between magnet poles, and an ergonomically improved gantry design. The additional time needed in the operating room (OR) for use of iMR imaging and the number of sessions per patient were recorded. Stereotactic accuracy of the integrated navigational tool was assessed using a water-covered phantom. Of the 55 patients who have undergone surgery in the PoleStar N20 device, diagnoses included glioma in 13, meningioma in 12, pituitary adenoma in nine, other skull base lesions in seven, and miscellaneous other diagnoses. The extra time required for use of the system averaged 1.1 hours (range 0.5-2 hours). Imaging sessions averaged 2.3 per surgery (range one-six sessions). Measurement of stereotactic accuracy revealed that T1-weighted images were the most accurate. Thinner slices yielded measurably greater accuracy, although this was of questionable clinical significance (all sequences < or =4 mm had a mean error...Continue Reading

References

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Jan 28, 2004·Stereotactic and Functional Neurosurgery·Michael SchulderBharat Biswal

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Citations

Oct 7, 2008·Neurosurgical Review·Christian SenftThomas Gasser
Jan 17, 2009·Topics in Magnetic Resonance Imaging : TMRI·Michael Schulder
May 9, 2008·Neuro-Chirurgie·M LevivierJ Brotchi
Jun 12, 2012·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·P L KubbenE M J Cornips
Feb 20, 2010·Acta neurochirurgica·Thomas GasserVolker Seifert
Jun 15, 2017·Stereotactic and Functional Neurosurgery·Daniel MarkowitzMichael Schulder
Aug 26, 2011·Neurologia i neurochirurgia polska·Marcin CzyżWłodzimierz Jarmundowicz
Nov 22, 2007·Physics in Medicine and Biology·D BrandenbergerA L Jacob
Jan 26, 2008·Journal of Magnetic Resonance Imaging : JMRI·Michael MocheHarald Busse
Aug 17, 2011·Current Opinion in Endocrinology, Diabetes, and Obesity·Mark J Winder, Marc R Mayberg
Jul 16, 2010·Technology in Cancer Research & Treatment·Christian SenftThomas Gasser
Mar 18, 2008·Critical Reviews in Oncology/hematology·Christine MarosiCharles Vecht

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Methods Mentioned

BETA
dissection
biopsy

Software Mentioned

PoleStar

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