Intraoperative MRI for stereotactic biopsy.

Area of Science:

• Neurosurgery
• Medical Imaging
• Diagnostic Procedures

Background:

• Stereotactic brain biopsy is crucial for diagnosing neurological conditions.
• Accurate targeting and placement of biopsy instruments are essential for diagnostic yield and patient safety.
• Limitations in traditional methods may lead to suboptimal results or complications.

Purpose of the Study:

• To evaluate the utility of intraoperative magnetic resonance imaging (ioMRI) as a standard tool for stereotactic brain biopsy.
• To assess the impact of ioMRI on diagnostic accuracy, cannula placement, and complication rates.
• To determine the feasibility of integrating ioMRI into routine neurosurgical operating environments.

Main Methods:

• Stereotactic brain biopsies were performed using the PoleStar N-20 ioMRI system under general anesthesia.
• MRI-compatible biopsy cannula and navigation tools were employed for precise instrument guidance.
• Intraoperative imaging was used for real-time tracking, cannula repositioning, and confirmation of placement.

Main Results:

• Histologic diagnosis was achieved in all but one of 39 patients (neoplasms and non-neoplastic conditions).
• ioMRI confirmed proper cannula placement in all cases, with 53% requiring repositioning for improved targeting or critical structure avoidance.
• No significant hemorrhages or other complications were observed; additional OR time averaged 1.1 hours.

Conclusions:

• Intraoperative magnetic resonance imaging is a valuable and feasible tool for routine stereotactic brain biopsy.
• ioMRI significantly improves diagnostic yield and enables avoidance of critical structures, enhancing patient safety.
• Despite added OR time and the need for general anesthesia, ioMRI is an ideal adjunct for brain biopsy procedures.