* Relationship between velocity profile and ultrasound echogenicity in pulsatile blood flows.
- Pulsatile blood flows are easily found in the vessels of living organisms. Under pulsatile flow conditions, red blood cells (RBCs) are aggregated and dispersed repetitively. The phenomenon of RBC aggregation is an influential factor in hemorheological and hemodynamic properties. This study aims to investigate the relationship between velocity profile and RBC aggregation in pulsatile blood flows. A rat extracorporeal bypass model was adopted to generate a real pulsatile flow without changing the rheological properties. To check the stability of the experimental model, variations of the hemodynamic parameters were measured consecutively for 2 h. Ultrasound speckle images of the blood flow in the extracorporeal bypass loop were acquired using a 35-MHz ultrasound scanner. The velocity fields were measured by the speckle image velocimetry (SIV) method, in which the cross-correlation algorithm is applied to the speckle images. In addition, the RBC aggregation was estimated by analyzing the echogenicity distribution of the speckle images. The shape of the velocity profile was cyclically varied according to the cardiac cycle. This variation may be closely related to the variation of the echogenicity distribution in pulsatile flows. The simultaneous measurement of velocity and RBC aggregation would be useful for understanding the effects of the hemorheological features on the hemodynamic characteristics of pulsatile blood flows.
=>模型, 作る, 形に表わす, 模範, モデル, 型, 模型の, 模範となる, かたどる, 手本, モデルをする,
手本となる
Overview of noun model
The noun model has 9 senses (first 7 from tagged texts)
1. (19) model, theoretical account, framework -- (a hypothetical description of a complex entity or
process; "the computer program was based on a model of the circulatory and respiratory systems")
2. (11) model -- (a type of product; "his car was an old model")
3. (6) model, poser -- (a person who poses for a photographer or painter or sculptor; "the president
didn't have time to be a model so the artist worked from photos")
4. (4) model, simulation -- (representation of something (sometimes on a smaller scale))
5. (3) exemplar, example, model, good example -- (something to be imitated; "an exemplar of
success"; "a model of clarity"; "he is the very model of a modern major general")
6. (1) model, role model -- (someone worthy of imitation; "every child needs a role model")
7. (1) model, example -- (a representative form or pattern; "I profited from his example")
8. mannequin, manikin, mannikin, manakin, fashion model, model -- (a woman who wears clothes to
display fashions; "she was too fat to be a mannequin")
9. model, modelling, modeling -- (the act of representing something (usually on a smaller scale))
Overview of verb model
The verb model has 6 senses (first 2 from tagged texts)
1. (1) model, pattern -- (plan or create according to a model or models)
2. (1) model, mold, mould -- (form in clay, wax, etc; "model a head with clay")
3. model, pose, sit, posture -- (assume a posture as for artistic purposes; "We don't know the woman
who posed for Leonardo so often")
4. model -- (display (clothes) as a mannequin; "model the latest fashion")
5. model, simulate -- (create a representation or model of; "The pilots are trained in conditions
simulating high-altitude flights")
6. model, mock up -- (construct a model of; "model an airplane")
Overview of adj model
The adj model has 1 sense (first 1 from tagged texts)
1. (1) exemplary, model -- (worthy of imitation; "exemplary behavior"; "model citizens")
--- WordNet end ---