国内女人喷潮完整视频,免费看三片在线播放,国产人妻互换一区二区水牛影视,最新吃瓜爆料免费观看

the phantom contains a thin plane of echogenic material embedded in a non-echoic rubber-based tissue-mimicking matrix. model 538n-h has two scan planes. the scattering plane is oriented at 45° to one scan plane【敏感詞】perpendicular to the other.

the beam profile is easily displayed at varying depths,【敏感詞】contains a great deal of information regarding the configuration of the sound beam as it propagates through the tissue-mimicking media. the beam profile clearly displays the near field, focal length, focal zone, beam width, side【敏感詞】grating lobes【敏感詞】beam divergence in the far field. in addition, amplitude variations in the near field are displayed as varying degrees of brightness versus the almost homogeneity of the amplitude in the far field.

the model 538n-h provides a means of evaluating the slice thickness of an imaging system at varying depths. slice thickness【敏感詞】elevational resolution, the third component of spatial resolution, displays reflections produced by structures in front of【敏感詞】behind the beam’s main axis. the effect of changes in the slice thickness is identical to those seen with axial【敏感詞】lateral resolution. the thinner the slice thickness the better the resolution; as the slice thickness increases, the degree of spatial resolution decreases. lifetime warranty.

tests performedbeam profile slice thickness image uniformity tissue harmonic imaging compatibility

uses:quality assurance final q.a. inspection research & development in-process manufacturing teaching

specifications

general 

overall dimensions: 25 x 22 x 7 cm
scan surfaces: 3
weight: 3.4 kg
tissue mimicking material: urethane rubber
freezing point: <-40°c
melting point: >100°c attenuation coefficient: 0.5
db/cm/mhz ± 5.0％
speed of sound: 1450 m/s ±1.0％ at 23°


targets scattering plane oriented at 45° to the scan planes used to measure slice thickness,【敏感詞】90° to the beam profile scan plane 

size: 26 x 7 cm
depth: 0 to 22 cm 

***lifetime warranty***