Abnormal variations of the neonatal brain perfusion can result in long-term neurodevelopmental consequences and cerebral imaging play an important role diagnostic therapeutic decision-making. To identify at-risk situations, must accurately evaluate both regional global perfusion. date, assessment remains challenging. The available modalities such as magnetic resonance (MRI), ultrasound imaging,...

The evolution of human cognition has been inferred from anthropological discoveries and estimates of brain size from fossil skulls. A more direct measure of cognition would be cerebral metabolic rate, which is proportional to cerebral blood flow rate (perfusion). The hominin cerebrum is supplied almost exclusively by the internal carotid arteries. The sizes of the foramina that transmitted thes...

BACKGROUND MR techniques have been very powerful in providing indicators of tissue perfusion, particularly in studies of cerebral ischemia. There is considerable interest in performing absolute perfusion measurements, with the aim of improving the characterization of tissue "at risk" of stroke. However, some important caveats relating to absolute measurements need to be taken into account. The ...

INTRODUCTION There continue to be some controversies concerning aortic arch reconstruction, especially the cerebral protection methods. We report our operative and postoperative outcomes for cases of aortic arch replacement using whole-body perfusion during aortic reconstruction under 28 degrees C moderate hypothermia. MATERIALS AND METHODS A total of 12 patients were operated on between Marc...

BACKGROUND AND PURPOSE Knowledge of cerebral blood flow (CBF) alterations in cases of acute stroke could be valuable in the early management of these cases. Among imaging techniques affording evaluation of cerebral perfusion, perfusion CT studies involve sequential acquisition of cerebral CT sections obtained in an axial mode during the IV administration of iodinated contrast material. They are...

OBJECTIVES To clarify cerebral perfusion distribution and cognitive functions in patients with chronic obstructive pulmonary disease (COPD) according to the hypoxia levels and to assess if there is a relationship between cognitive impairment and cerebral perfusion index. PATIENTS AND METHODS Eight patients with stable hypoxemic COPD (HC), 10 patients with stable nonhypoxemic COPD (NHC), and 1...

The technical feasibility and diagnostic potential of angiographic flat-detector perfusion imaging technique, combining digital subtraction angiography with a computed tomography steady-state imaging, was explored in patients treated direct or indirect revascularization surgery. This short communication is about an modality great for evaluation, comparison grading vascular territory areas anato...

BACKGROUND AND PURPOSE We generated regional cerebral blood volume (rCBV) and regional cerebral blood flow (rCBF) studies from dynamic susceptibility contrast-enhanced MR images after an intravenous bolus injection of contrast agent (perfusion-weighted imaging [PWI]) by applying indicator dilution theory. We used a multishot echo-planar imaging (EPI) sequence to obtain adequate arterial input f...