Cerebral Edema Attenuated Inversion Recovery MR Sequence in Low Magnetic Field: A Feasibility Study
| Autor: | Jani Katisko, Salla-Maarit Kokkonen, Hagen Shiffbauer, Juho Tuominen, Jari Erkkilä, Eero Ilkko, Sanna Yrjänä, John Koivukangas |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Neuronavigation Adolescent medicine.medical_treatment Brain tumor Brain Edema Astrocytoma Neurosurgical Procedures Cerebral edema Diagnosis Differential Edema medicine Humans Neuroectodermal Tumors Primitive Radiology Nuclear Medicine and imaging Child Craniotomy Aged Postoperative Care Intraoperative Care medicine.diagnostic_test Brain Neoplasms business.industry Brain Signal Processing Computer-Assisted Magnetic resonance imaging Middle Aged Image Enhancement medicine.disease Magnetic Resonance Imaging Surgery Image-guided surgery Feasibility Studies Female Radiology medicine.symptom business |
| Zdroj: | Academic Radiology. 13:219-228 |
| ISSN: | 1076-6332 |
| DOI: | 10.1016/j.acra.2005.10.004 |
| Popis: | Rationale and Objectives Minimally invasive neurosurgery requires methods to specify surgical boundaries of target tissue, such as brain tumors. This study investigated technical possibilities and clinical usefulness of adapting edema attenuated inversion recovery (EDAIR) pulse sequences to suppress magnetic resonance signal from cerebral edema in brain tumor patients. Materials and Methods A resistive 0.23-T magnetic resonance scanner with magnitude-encoded inversion recovery sequences was used. Twenty-eight separate scanning tests in 25 neurosurgical brain tumor patients were performed on the day before surgery. An inversion recovery sequence with several inversion times between 150 and 2,200 ms was tested. The same sequences were also used intraoperatively and postoperatively. Results T1 relaxation time of brain edema varied from case to case. An inversion recovery sequence with an inversion time of 400–800 milliseconds attenuated brain edema and seemed to help in demarcating gross brain tumor for surgical resection. These features were helpful for the evaluation of resectable tumor tissue particularly using neuronavigation techniques. Conclusions According to these preliminary findings, inversion recovery sequences supplement other imaging modalities and assist neurosurgeons in evaluating different surgical trajectories and in estimating brain tumor volume before craniotomy. |
| Databáze: | OpenAIRE |
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