Comparison of Partial Volume Effects in Arterial and Venous Contrast Curves in CT Brain Perfusion Imaging
نویسندگان
چکیده
منابع مشابه
Comparison of Partial Volume Effects in Arterial and Venous Contrast Curves in CT Brain Perfusion Imaging
PURPOSE In brain CT perfusion (CTP), the arterial contrast bolus is scaled to have the same area under the curve (AUC) as the venous outflow to correct for partial volume effects (PVE). This scaling is based on the assumption that large veins are unaffected by PVE. Measurement of the internal carotid artery (ICA), usually unaffected by PVE due to its large diameter, may avoid the need for parti...
متن کاملQuantification of partial volume effects in planar imaging
Introduction: The limited resolution of the imaging system causes partial volume effects (PVEs). These results in spreading of image counts to the neighboring pixels. This phenomenon is called spill-out effect. This study aimed at quantifying PVEs using ImageJ. Methods:Technetium-99m solution of concentration of 74 kBq/ml was filled into spheres A, B<...
متن کاملThe impact of partial-volume effects in dynamic susceptibility contrast magnetic resonance perfusion imaging.
PURPOSE To demonstrate the degree of the cerebral blood flow (CBF) estimation bias that could arise from distortion of the arterial input function (AIF) as a result of partial-volume effects (PVEs) in dynamic susceptibility contrast (DSC) magnetic resonance imaging (MRI). MATERIALS AND METHODS A model of the volume fraction an artery occupies in a voxel was devised, and a mathematical relatio...
متن کاملCorrecting for Partial Volume Effects in Arterial Spin Labeling Perfusion Imaging of Alzheimer's Disease
pure GM CBF (2 row), and net CBF image (3rd row) are shown for AD (left panel) and HC (right panel). Note the overall lower intensity of CBF in AD patients as compared to the age-matched HC. Also, note that pure GM CBF maps are independent of GM fractional volume at a given voxel thus reflecting voxel’s GM flow density. Fig2: ROI-wise average CBF values for HC, MCI, and AD are shown in bleu, ye...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLoS ONE
سال: 2014
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0097586