Contrast-enhanced Digital Subtraction MRI in Vertebral Metastases
- VernacularTitle:脊椎转移瘤增强减影MR成像
- Author:
Wei LIN
;
Hong REN
;
Ming ZHANG
- Publication Type:Journal Article
- Keywords:
MRI;
contrast-enhanced;
digital subtraction;
vertebral metastases
- From:
Journal of Practical Radiology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the clinical application of contrast-enhanced digital subtraction MRI in vertebral metastases.Methods 50 patients with vertebral metastases were scanned by contrast-enhanced T_1WI with an injection of Gd-DTPA(0.1 mmol/kg).Digital subtraction were performed between post-contrast-enhanced images and pre-contrast-enhanced images.Vertebral metastases were evaluated by means of a contrast to noise ratio(CNR) and signal to noise ratio(SNR),and boundaries were compared between subtraction MRI images and conventional contrast T_1WI MR images.Results Contrast-enhanced digital subtraction MRI images were better than conventional contrast T_1WI MR images in showing the lesions. All lesions had a higher CNR and SNR on subtraction MR imaging than that on conventional contrast T_1WI MR images.CNR was 155.05 ? 24.73(mean ? standard error) for subtraction MR imaging and11.11?14.26 for conventional contrast T_1WI MR images,(t=35.65,P
