Application value of DSC-PWI in ischemic cerebrovascular disease

Objective To explore the application value in cerebral blood perfusion status of dynamic susceptibility contrast enhanced perfusion weighted imaging (DSC-PWI) in ischemic cerebrovascular disease (ICVD). Methods Retrospective analysis of 31 cases ICVD head magnetic resonance imaging (MRI), diffusion weighted imaging (DWI), magnetic resonance angiography (MRA) and DSC-PWI image in clinical diagnosis, and selectively analyze parameters including relative cerebral blood flow (rCBF), relative cerebral blood volume (rCBV), mean transit time (MTT) and time to peak (TTP) for generalize its characteristics. Results 31 cases of ICVD, 16 cases hypoperfusion, rCBF decreased significantly, rCBV decreased, MTT and TTP prolonged, include 7 cases of large vessel disease and 5 cases of small vessel disease. The collateral circulation formed 9 cases, including 3 cases with good compensation, rCBF normal, rCBV normal, MTT and TTP prolonged, 6 cases with bad compensation, rCBF decreased, rCBV normal or increased, MTT and TTP prolonged. The blood reperfusion in 3 cases, rCBF normal or slightly increased, rCBV increased, MTT shortened or normal, and TTP shortened. The excessive perfusion in 3 cases, rCBF significantly increased and rCBV significantly increased, with MTT and TTP shortened. Conclusions DSC-PWI can reliably reflect the perfusion state and collateral circulation compensation of ICVD, so as to guide the selection of clinical treatment program and significantly improve the prognosis of patients. Key words: Hypoxia-ischemia, brain; Magnetic resonance imaging; Dynamic susceptibility contrast enhanced perfusion weighted imaging