نتایج جستجو برای: volume estimation
تعداد نتایج: 569924 فیلتر نتایج به سال:
non-linear time series models have become fashionable tools to describe and forecast stock market returns in recent years. a significant amount of evidence supports a negative relationship between volume and future returns. this suggests that volume could act as a suitable threshold variable in lstar and tar models. in this research, we compared the forecasting ability of lsatr and tar models w...
OBJECTIVE To study the increase accuracy of visual estimation of blood loss after an education program. MATERIAL AND METHOD Seven simulated scenarios with known measured amount of blood were created by using expired packed red cell from blood bank and common surgical materials. Ninety nurses were randomized into two groups. The experimental group attended blood loss estimation course while th...
RATIONALE AND OBJECTIVES Accurate prostate volume estimation is useful for calculating prostate-specific antigen density and in evaluating posttreatment response. In the clinic, prostate volume estimation involves modeling the prostate as an ellipsoid or a spheroid from transrectal ultrasound, or T2-weighted magnetic resonance imaging (MRI). However, this requires some degree of manual interven...
Quantitative perfusion MRI based on arterial spin labeling (ASL) is hampered by partial volume effects (PVEs), arising due to voxel signal cross-contamination between different compartments. To address this issue, several partial volume correction (PVC) methods have been presented. Most previous methods rely on segmentation of a high-resolution T1 -weighted morphological image volume that is co...
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