Bolus Perfusion-weighted Imaging Measurement of Quantitative Cerebral Blood Flow Can Be Improved Using an Arterial Spin Label Derived Scaling Factor: a Comparative Xenon Ct Study
نویسندگان
چکیده
Fig 2: Correcting PWI improves the correlation of CBF for all patients, using xeCT as a gold standard (n=704 regions). ASL=green, PWI=blue. Method Mean CBF CBF/xeCT (COV) R xeCT 36±9 1 n/a ASL 31±6 0.90±0.24 (26%) 0.40±0.14 PWI 16±7 0.47±0.23 (50%) 0.40±0.28 PWI corrected 32±6 0.91±0.23 (25%) 0.40±0.11 Table 1: CBF values in ml/100 g/min. All values mean±SD BOLUS PERFUSION-WEIGHTED IMAGING MEASUREMENT OF QUANTITATIVE CEREBRAL BLOOD FLOW CAN BE IMPROVED USING AN ARTERIAL SPIN LABEL DERIVED SCALING FACTOR: A COMPARATIVE XENON CT STUDY
منابع مشابه
Cerebral blood flow imaging . Relation to blood rheology
A number of techniques allow imaging of the cerebral blood flow (CBF). Flow-sensitive time-of –flight (TOF) magnetic resonance imaging (MRI) demonstrates good representation of the flow but the extracranial hemodynamics could be assessed by color duplex ultrasound of the carotid arteries. Computerized tomography (CT), Xenon enhanced or CT perfusion with iodinated contrast, singlephoton emission...
متن کاملArterial spin-labeling MRI can identify the presence and intensity of collateral perfusion in patients with moyamoya disease.
BACKGROUND AND PURPOSE Determining the presence and adequacy of collateral blood flow is important in cerebrovascular disease. Therefore, we explored whether a noninvasive imaging modality, arterial spin labeling (ASL) MRI, could be used to detect the presence and intensity of collateral flow using digital subtraction angiography (DSA) and stable xenon CT cerebral blood flow as gold standards f...
متن کاملArterial spin-label imaging in patients with normal bolus perfusion-weighted MR imaging findings: pilot identification of the borderzone sign.
PURPOSE To determine whether perfusion abnormalities are depicted on arterial spin-labeling (ASL) images obtained in patients with normal bolus perfusion-weighted (PW) magnetic resonance (MR) imaging findings. MATERIALS AND METHODS Institutional review board approval and written informed patient consent were obtained. This study was HIPAA compliant. Consecutive patients suspected or known to ...
متن کاملQuantification of blood flow in brain tumors: comparison of arterial spin labeling and dynamic susceptibility-weighted contrast-enhanced MR imaging.
PURPOSE To implement an arterial spin labeling technique that is feasible in routine examinations and to test the method and compare it with dynamic susceptibility-weighted contrast material-enhanced magnetic resonance (MR) imaging for evaluation of tumor blood flow (TBF) in patients with brain tumors. MATERIALS AND METHODS Thirty-six patients with histologically proven brain tumors were exam...
متن کاملImaging of Cerebral Blood Flow in Patients with Severe Traumatic Brain Injury in the Neurointensive Care
Ischemia is a common and deleterious secondary injury following traumatic brain injury (TBI). A great challenge for the treatment of TBI patients in the neurointensive care unit (NICU) is to detect early signs of ischemia in order to prevent further advancement and deterioration of the brain tissue. Today, several imaging techniques are available to monitor cerebral blood flow (CBF) in the inju...
متن کامل