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BACKGROUND Functional neuronavigation with intraoperative 3-dimensional (3D) ultrasound may facilitate safer brain lesion resections than conventional neuronavigation. OBJECTIVE In this study, functional magnetic resonance imaging (fMRI) and diffusion tensor tractography (DTT) were used to map eloquent areas. We assessed the use of fMRI and DTT for(More)
T HE DIFFUSE LOW-GRADE GLIO-mas (LGGs) include World Health Organization (WHO) grade II astrocytomas, oligo-dendrogliomas, and oligoastrocyto-mas. 1 Due to diffuse brain infiltration, LGGs are usually not considered surgically curable. 2 In fact, the effect of surgery on survival remains unclear because current evidence relies on uncontrolled surgical(More)
Reports on long-term health related quality of life (HRQL) after surgery for World Health Organization grade II diffuse low-grade gliomas (LGG) are rare. We aimed to compare long-term HRQL in two hospital cohorts with different surgical strategies. Biopsy and watchful waiting was favored in one hospital, while early resections guided with three-dimensional(More)
OBJECTIVE The aims of this study of patients with high-grade gliomas in eloquent brain areas were 1) to assess the postoperative functional outcome, 2) to determine the extent of tumour resection in these difficult locations, 3) to evaluate the practical usefulness of navigated blood oxygenation level-dependent functional magnetic resonance imaging and(More)
In a patient with no prior history of seizures we were able to record static (mean) intracranial pressure (ICP) and pulsatile ICP (mean ICP wave amplitude) continuously during a first-time generalized epileptic seizure. The patient experienced episodic headache five months after a subarachnoid haemorrhage. In order to rule out low-pressure hydrocephalus she(More)
BACKGROUND A number of tools, including intraoperative ultrasound, are reported to facilitate surgical resection of high-grade gliomas. However, results from selected surgical series do not necessarily reflect the effectiveness in common neurosurgical practice. Delineation of seemingly similar brain tumours vary in different ultrasound-guided operations,(More)
OBJECTIVE Residual tumor masses are common after transsphenoidal surgery. The risk of a residual mass increases with tumor size and parasellar or suprasellar growth. Transsphenoidal surgery is usually performed without image guidance. We aimed to investigate a new technical solution developed for intraoperative ultrasound imaging during transsphenoidal(More)
In recent years the quality of ultrasound (US) imaging has improved considerably. The integration of three dimensional (3D) US with neuronavigation technology has created an efficient and inexpensive tool for intra-operative imaging in neurosurgery. Our experience is based on more than 900 operations with the intra-operative 3D ultrasound equipment(More)
BACKGROUND Surgical management of suspected LGG remains controversial. A key factor when deciding a surgical strategy is often the tumors' perceived relationship to eloquent brain regions OBJECTIVE To study the association between tumor location, survival and long-term health related quality of life (HRQL) in patients with supratentorial low-grade gliomas(More)
BACKGROUND Numerous observational studies indicate that more aggressive resection may prolong survival in glioblastoma patients. In Trondheim, Norway, intraoperative 3D ultrasound has been in increasing use since November 1997. The aim of the present study was to examine if the introduction of 3D ultrasound and neuronavigation (i. e., the SonoWand® system)(More)