201Tl SPET in the differential diagnosis of brain tumours.

摘要: The aims of this study were to assess the utility 201 Tl single photon emission tomography (SPET) in differential diagnosis brain tumours and elucidate relationship between tumour uptake degree contrast-enhancement on magnetic resonance imaging (MRI). Early (15 min) delayed (3 h) SPET T 1 -weighted MRI performed before after Gd-DTPA enhancement 101 (41 malignant 60 benign) untreated tumours. ratio (tumour-to-normal count ratio) for both early studies retention index (the uptake) calculated. Malignant separated from benign with 87% accuracy based assumption that a <0.7 or no abnormal are benign. Meningiomas pituitary adenomas differentiated other by their characteristic pattern SPET. was concordant most histological types. However, schwannomas cavernous haemangiomas showed low spite high MRI. In conclusion, provides additional information helps