PET系统的硬件主要包括机架、环形探测器、符合电路、检查床及计算机工作站等。
The system hardware include gantry, detector, coincidence circuit, patient table and computer workstation.
但LCROSS探测器(全称为月球环形山观测和遥感卫星)的这项任务有可能最终会在空间探索领域中具有同样深远的影响。
But the LCROSS (Lunar Crater Observation and Sensing Satellite) mission could eventually have a similarly dramatic impact on space exploration.
随着一级空火箭和一个月球探测器分别撞击到月球表面不同的两座环形山上，美国航空航天局（NASA）的大型“双重撞月”行动在今天早晨取得了成功。
NASA's double sledgehammer shot to the moon succeeded early this morning when an empty rocket stage and a lunar probe each crashed into separate craters.
“圣杯”项目经理大卫·雷曼表示美国宇航局将人为使这两辆探测器撞击月球北极附近的环形山。
Grail project manager David Lehman says NASA will intentionally crash the probes into a mountain near the Moon's North Pole.
LCROSS探测器，对月球环形山观测和传感卫星，上周推出，也有任务目标，以确认在接近月球极阴影中的环形山的存在或缺乏的水冰。
LCROSS, the lunar crater Observation and Sensor Satellite, launched last week, has a mission objective to confirm the presence or absence of water ice in a Shadowed crater near a lunar pole.
用计算机模拟和光学传递函数数值计算，分析了采用不同环形透镜及探测器对系统成像特性的影响。
By using computer simulation and numerical computation of OTF, the image property is analyzed for the case of different annular lenses and detector in confocal scanning system.
与密度测井不同的是，其伽马射线源和探测器的布置方式能使它们对井内环形空隙中物质的密度很敏感，可以将套管外面的流体和水泥区分开来。
The source and detector, however, are arranged to be sensitive to the density of material in the annulus and can distinguish between fluid and cement behind the casing.
本文介绍了环形(位置灵敏)充气探测器的结构及性能。
The structure and properties of ring (position sensitive) gas filled detector were described.
箭头所指的看上去像新形成的环形山明显要亮的多，因此在克莱芒·蒂娜环月轨道探测器所拍摄的蓝光和近红外合成照片中就会显得更蓝。
This fresh-looking lunar crater (arrowed) appears significantly brighter, and thus inherently bluer, in a Mosaic of blue-light and near-infrared images from the Clementine spacecraft.
早期的月球探测器探测到一个满是山峰的、崎岖的和环形山遍布的表面，与月海截然不同。
Early lunar probes revealed a surface that was mountainous, rugged, heavily cratered and virtually devoid of maria.
早期的月球探测器探测到一个满是山峰的、崎岖的和环形山遍布的表面，与月海截然不同。
Early lunar probes revealed a surface that was mountainous, rugged, heavily cratered and virtually devoid of maria.
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