Diffusion-weighted MR imaging study on lumbar osteolytic metastasis
- VernacularTitle:腰椎溶骨型转移瘤MR扩散加权成像研究
- Author:
Wenjian XU
;
Dapeng HAO
;
Aide XU
;
Jihua LIU
- Publication Type:Journal Article
- Keywords:
Lumbar vertebrae;
Neoplam metastasis;
Diffusion magnetic resonance imaging
- From:
Chinese Journal of Radiology
1994;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study diffusion characteristic, diffusion-weighted imaging (DWI) technique and its value in lumbar osteolytic metastases. Methods Twenty patients with lumbar osteolytic metastases and 20 controls were performed with sagittal SE T_1WI, FSE T_2WI, fat saturation FSE T_2WI(FS-FSE T_2WI)and single-shot spin-echo echoplanar DWI, respectively. Contrast noise ratios (CNRs) of the metastases on various series were compared. On DWI, signal attenuation ratios (SARs) and apparent diffusion coefficients (ADCs) of lumbar osteolytic metastases and normal vertebrae were analyzed. Results (1) Routine MRI appearance: There were 23 lesions in the 20 patients. The signal intensity of all lesions showed hypointense on SE T_1WI, hyperintense on FS-FSE T_2WI and DWI, and mixed signal intensity (5 cases), isointense (12 cases) or slight hyperintense (6 cases) on FSE T_2WI. (2) CNR: The CNRs of patient group on FSE T_2WI(5.70?3.82)were lower than those on SE T_1WI(25.62?11.73), FS-FSE T_2WI(23.37?7.48)and DWI (b=600 s/mm2)(24.69?9.87)(U values were 5.393, 6.359, and 5.547, respectively,P
