title: Intracranial lesions with high signal intensity on T1-weighted MR images - review of pathologies.
abstract: In the article we present pathological intracranial substances and lesions, which produce high signal intensity on T1-weighted MR images. Six groups of substances are discussed: 1. Gadolinium - based contrast agents, 2.hemoglobin degradation products (intra- and extra-cellular methemoglobin), 3. lipid-containing lesions (lipoma, dermoid cyst, implanted fatty materials, laminar cortical necrosis), 4. substances with high concentration of proteins (colloid cyst, craniopharyngioma, Rathke's cleft cyst, ectopic posterior pituitary gland), 5. melanin (metastatic melanoma), 6. lesions containing mineral substances such as: calcium (calcifications, Fahr's disease), copper (Wilson's disease) and manganese (hepatic encephalopathy, manganese intoxication in intravenous drug abusers). Appropriate interpretation of signal intensity as well as analysis of location of lesions and clinical symptoms enables planning of further diagnostics and, in many cases, establishing the final diagnosis based on MR examination.
authors: Department of General, Interventional Radiology and Neuroradiology, Chair of Radiology, Wrocław Medical University, Wrocław, Poland ; Department of General, Interventional Radiology and Neuroradiology, University Clinical Hospital, Wrocław, Poland.
authors: Anna
authors: A
authors: Zimny
authors: Department of General, Interventional Radiology and Neuroradiology, University Clinical Hospital, Wrocław, Poland.
authors: Lidia
authors: L
authors: Zińska
authors: Department of General, Interventional Radiology and Neuroradiology, Chair of Radiology, Wrocław Medical University, Wrocław, Poland ; Department of General, Interventional Radiology and Neuroradiology, University Clinical Hospital, Wrocław, Poland.
authors: Joanna
authors: J
authors: Bladowska
authors: Department of General, Interventional Radiology and Neuroradiology, Chair of Radiology, Wrocław Medical University, Wrocław, Poland ; Department of General, Interventional Radiology and Neuroradiology, University Clinical Hospital, Wrocław, Poland.
authors: Małgorzata
authors: M
authors: Neska-Matuszewska
authors: Department of General, Interventional Radiology and Neuroradiology, Chair of Radiology, Wrocław Medical University, Wrocław, Poland ; Department of General, Interventional Radiology and Neuroradiology, University Clinical Hospital, Wrocław, Poland.
authors: Marek
authors: M
authors: Sąsiadek
keywords: MRI; T1-weighted pictures; hyperintense