The results showed that tourniquet inflation had no effect on the estimated value of CBV or the differential pathlength factor. We conclude that, provided the distance between light entry and exit on the surface of the scalp is sufficiently large, changes in scalp blood flow have no effect on NIRS measurement of cerebral haemodynamics.

它是对选定感兴趣层面进行连续动态扫描，获得所选层面的每一像素的时间密度曲线，并通过数学模型处理得到：脑血流容量（cerebral blood volume，CBV）、脑血流流量（cerebral blood flow，CBF）、对比剂平均通过时间（mean transit time，MTT）、对比剂峰值时 …

1996年12月1日 · Measurement of neonatal cerebral blood volume (CBV) by NIRS was described in 1990 but it has been suggested that, in adults, scalp and skull blood content contribute a...

Recently, a vascular-space-occupancy (VASO) MRI technique was developed for quantitative assessment of cerebral blood volume (CBV). This method uses the T1-shortening effect of gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA) with imaging ...

2025年2月3日 · Recently, it has been proposed that signals and derived metrics from cerebral near-infrared spectroscopy (NIRS), a non-invasive sensor, can be used to estimate CBV. However, this association remains vastly unexplored. As such, this scoping review aimed to examine the literature on the relationship between cerebral NIRS signals and CBV.

Exercise induces changes to skin blood flow via cutaneous vasodilation, and since NIRS probes are placed on the scalp, NIR-light can be attenuated via chromophores in the superficial vessels of...

1996年11月1日 · Measurement of neonatal cerebral blood volume (CBV) by NIRS was described in 1990 but it has been suggested that, in adults, scalp and skull blood content contribute a significant amount to the cerebral haemodynamic variables quantifiable by NIRS.

DC shifts were compared to changes in cerebral blood volume (CBV) measured by near-infrared spectroscopy (NIRS). Results: DC shifts were observed during all manipulations with highest amplitudes (up to 250 microV) at the midline electrodes, and the most pronounced changes (up to 15 microV/cm) in the DC voltage gradient around vertex.

2023年7月17日 · CT灌注 (CTP)是一种功能成像技术，可提供有关脑实质毛细血管水平血流动力学的重要信息，在评估急性中风、血管痉挛和其他神经血管疾病方面是对非增强CT和CT血管造影优势的自然补充。 CTP在确定不可逆性脑梗死组织 (梗死“核心”)和严重缺血但可能可挽救的组织 (“半暗带”)的范围方面至关重要。 这是通过生成脑血流量、脑血容量和平均传输时间的参数图来实现的. 缺血半暗带指临床上可以被挽救的脑组织。 CTP在检测缺血性脑损伤及区分梗死灶和缺血半 …

2020年9月24日 · Cerebral blood volume (CBV) (often relative CBV: see below) is one of the parameters generated by perfusion techniques (CT perfusion and MR perfusion). CBV is defined as the volume of blood in a given amount of brain tissue, most commonly milliliters of blood per 100 g of brain tissue 1.