Intraoperative MRI with a rotating, tiltable surgical table: a time use study and clinical results in 122 patients.

Objective: The objective of our study was to evaluate intraoperative low-field MRI for the frequency and duration of imaging sessions needed during surgery, the direct additional procedure time attributable to imaging, and the proportion of cases in which information provided by intraoperative MRI led to a change in the procedure or otherwise was deemed valuable by operating surgeons.

Materials And Methods: One hundred twenty-two patients (65 males, 57 females; age range, 6-77 years; mean age, 43.8 years) underwent 130 neurosurgical and ENT procedures (106 craniotomies, 17 transsphenoidal pituitary resections, three biopsies, three intracranial cyst aspirations or injections, and one skull base resection) in a specially designed surgical MRI suite equipped with a 0.

[Safety and safety limits in MRI].

The influence of electromagnetic fields on humans through the use of magnetic resonance tomography is an ongoing topic in the scientific literature. However, the contents of relevant standards and legal regulations governing the operation of MR equipment are less well known. We summarize the actual status and give an overview of the national and international bodies in charge of generation and publication of guidelines and regulations.

[Safety aspects in interventional MRI].

Because of its high soft-tissue contrast, Magnetic Resonance Imaging (MRI) is used increasingly for guidance and control of minimal invasive and neurological surgical procedures. Besides common precautions during an MRI investigation, special attention has to be paid to the consequences of MR compatibility, accuracy of localisation of interventional tools and geometrical distortions. As a new application of interventional MR intravascular procedures are developing that involve the introduction of guidewires, catheters and miniaturized coils with their leads into the blood vessels.