Darstellung regionaler Hirnperfusion mit dynamischer Magnetresonanztomographie

Autor:	B Wallner, G Bargon, M. D. Häussler
Rok vydání:	1992
Předmět:	High contrast medicine.diagnostic_test Pulse (signal processing) business.industry Perfusion scanning Magnetic resonance imaging Brain tissue Nuclear magnetic resonance Medicine Radiology Nuclear Medicine and imaging business Nuclear medicine Bolus (radiation therapy) Perfusion Gradient echo
Zdroj:	RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 156:207-211
ISSN:	1438-9010 1438-9029
Popis:	Bolus injections of gadolinium-DTPA result in high contrast concentration in the distal vessels within the brain and cause a local disturbance of the magnetic field with a shortening of T2 relaxation time. Pulse frequencies were designed to demonstrate inhomogeneities in the magnetic field. The resultant reduction in T2-weighted gradient echo signals was used in order to examine changes in regional perfusion caused by pathological conditions. Cerebral tumours showed variable perfusion patterns but were always better perfused than surrounding brain tissue; oedema surrounding the tumour resulted in reduced perfusion. Ischaemic infarcts showed significant underperfusion compared with control areas. In both groups the areas involved were larger on the perfusion scans than on T2-weighted images.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b58270a30d497f4f1c4bbdb5e56fb38 https://doi.org/10.1055/s-2008-1032869 Zobrazit plný text záznamu