Intravoxel Incoherent Motion (IVIM) MRI in Intracranial, Extraaxial Tumors and Cysts
| Autor: | Yasutaka Kawamura, Tsuyoshi Matsuda, Nobushige Hayashi, Satoshi Itoh, Toshiko Iwasaki, Youichi Tamagawa, Hirohiko Kimura, Yasushi Ishii, Kazutaka Yamamoto, Masayuki Maeda |
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| Rok vydání: | 1992 |
| Předmět: |
Adult
Male Imaging phantom Gradient strength otorhinolaryngologic diseases Humans Medicine Effective diffusion coefficient Radiology Nuclear Medicine and imaging Cyst Child Intravoxel incoherent motion medicine.diagnostic_test Brain Neoplasms Cysts business.industry Brain Magnetic resonance imaging Neuroma Acoustic medicine.disease Magnetic Resonance Imaging Csf flow Arachnoid Cysts body regions Female business Nuclear medicine |
| Zdroj: | Journal of Computer Assisted Tomography. 16:514-518 |
| ISSN: | 0363-8715 |
| DOI: | 10.1097/00004728-199207000-00003 |
| Popis: | Intravoxel incoherent motion MRI was used to assess six intracranial, extraaxial cysts and tumors including two epidermoids, two cystic acoustic schwannomas, and two arachnoid cysts. A maximum gradient strength of 0.7 g/cm was used simultaneously along all axes (maximum gradient beta value: 445 s/mm2) and comparisons were made with an external water phantom. In epidermoid tumors the apparent diffusion coefficient (ADC) was similar to that of normal brain, thus indicating their solid nature. In acoustic schwannomas an ADC similar to the external water phantom indicated cystic components, whereas an ADC similar to brain was found in the solid portions of the tumor. The ADC of arachnoid cysts was similar to that of the water phantom, indicating their fluid nature. Due to macroscopic CSF flow, cisternal CSF showed high ADC, which enabled epidermoid tumors to be highlighted. |
| Databáze: | OpenAIRE |
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