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三维适形放射治疗
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三维适形放射治疗
Encyclopedia
医学
放射治疗
释
3-dimensional conformal radiation therapy,3DCRT
三维适形放射治疗
利用患者电子计算机断层扫描(computed tomography, CT)图像重建三维的解剖结构,选择不同的入射方向,采用多叶光栅或铅挡形成与病变(靶区)形状一致的多个照射野,使得高剂量区剂量分布的形状在三维方向上与病变(靶区)的形状一致,同时使得病灶周围正常组织的受照剂量降低的放射治疗技术。
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Seasons Shift
season to adjust pumped storage power station
sea stack
sea-star
seastar Tension leg Platform
sea state
sea surface backscatter
sea surface evaporation
sea surface humidity measuring instrument
sea surface illuminance meter
sea surface latent heat flux
sea surface long wave radiation
sea-surface microlayer
sea surface reverberation
sea surface sensible heat flux
sea surface short wave
sea surface temperature
sea surface temperature inversion
sea surface temperature reemergence
sea surface topography
sea surface turbulence kinetic energy
sea surface wind measuring instrument
seat air supply
seat arranger
seat belts
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