Objective:To study the clinical value of susceptibility weighted imaging(SWI)in brain diseases.Methods:37 cases with blood vessel pathological change of brain diseases were collected and analyzed

including 8 example of angioma cavernosum

10 cerebral infarction

15 brain tumor

2 venous malformation and 2 venous sinus thrombus.Conventional T1WI

T2WI

DWI

the SWI and enhanced T1WI

MRA images were performed to compare the superiority of the SWI images to the others in demonstrating the small hemorrhagic focuses

the small vein

hemosiderin

calcification and other paramagnetic materials.Results:SWI could distinguish the hemorrhage from the blood vessel and discover the smaller hemorrhagic focuses of the angioma cavernosum.It could discover more tiny veins adjacent to the dilated draining vein.SWI could detect small hemorrhages in acute cerebral infarction and small draining veins in brain tumor.And draining veins in deep part and expanded rete venosum in the surfaces of brains could be obviously demonstrated when sinus venosus thrombus occurred.Conclusion:SWI is a new pulse sequence that can demonstrate the abnormal low current capacity blood vessels

the structure of small vein

the tiny hemorrhages as well as ferrugination and calcium deposition sensitively.So it can be applied in the diagnosis and antidiastole of the central nervous system diseases as an important supplement to the MRI conventional sequences.