pencil beam

简明释义

锐方向性射束

英英释义

例句

1.The laser used in the experiment emitted a pencil beam that allowed for precise measurements.

实验中使用的激光发出了一束细长光束，使得测量非常精确。

2.During the presentation, the spotlight created a pencil beam effect that highlighted the speaker's face.

在演讲期间，聚光灯产生了一个细长光束效果，突出了演讲者的面孔。

3.The new imaging technique employs a pencil beam to achieve high-resolution scans.

这种新成像技术采用细长光束以实现高分辨率扫描。

4.In astronomy, a pencil beam is used to observe distant stars with minimal interference.

在天文学中，使用细长光束观察遥远的星星，以减少干扰。

5.The radar system utilizes a pencil beam to track small objects in the sky.

雷达系统利用细长光束跟踪天空中的小物体。

作文

In the world of physics and engineering, the term pencil beam refers to a highly focused beam of radiation or light that is narrow and directional. This concept is particularly significant in fields such as medical imaging and radiation therapy, where precision is crucial for effective treatment and diagnosis. The pencil beam is characterized by its ability to deliver energy to a specific point without dispersing significantly over distance, making it ideal for applications that require minimal collateral damage to surrounding tissues.For instance, in radiation therapy for cancer patients, doctors utilize a pencil beam to target tumors precisely. Unlike broader beams that may affect healthy tissues, the pencil beam can be adjusted to strike only the tumor, maximizing the dose delivered to malignant cells while sparing normal cells. This precision enhances the effectiveness of the treatment and reduces side effects, which is a significant concern for patients undergoing such therapies.Moreover, the technology behind pencil beams has evolved with advancements in imaging techniques. In positron emission tomography (PET) scans, for example, a pencil beam is used to create detailed images of metabolic processes in the body. The narrow focus allows for high-resolution images, enabling healthcare professionals to identify abnormalities at an early stage. This application of pencil beams demonstrates their importance not only in treatment but also in diagnostic procedures.Outside of medical applications, pencil beams are also utilized in various scientific research fields. In particle physics, for example, researchers employ pencil beams of particles to collide with targets, allowing them to study fundamental interactions at a subatomic level. These experiments help scientists understand the building blocks of matter and the forces that govern the universe.In conclusion, the concept of pencil beam is integral to many modern technologies, particularly in medicine and scientific research. Its ability to deliver focused energy with precision makes it invaluable for treatments and diagnostics in healthcare, as well as for experimental physics. As technology continues to advance, the applications of pencil beams will likely expand, leading to even more innovative solutions in various fields. Understanding the significance of pencil beams can provide insights into how focused energy can transform both treatment methodologies and scientific exploration, ultimately benefiting society as a whole.

在物理和工程领域，术语pencil beam指的是一种高度集中的辐射或光束，其狭窄且具有方向性。这个概念在医学成像和放射治疗等领域尤为重要，因为精确性对于有效的治疗和诊断至关重要。pencil beam的特点是能够将能量传递到特定点，而不会在距离上显著分散，这使其非常适合需要对周围组织造成最小附带损伤的应用。例如，在癌症患者的放射治疗中，医生利用pencil beam精确定位肿瘤。与可能影响健康组织的更宽束相比，pencil beam可以调整以仅打击肿瘤，从而最大限度地提高对恶性细胞的剂量，同时保护正常细胞。这种精确性提高了治疗的有效性并减少了副作用，这是接受这种治疗的患者的重要关注点。此外，随着成像技术的进步，pencil beam背后的技术也在不断发展。例如，在正电子发射断层扫描（PET）中，使用pencil beam创建身体代谢过程的详细图像。狭窄的焦点允许高分辨率图像，使医疗专业人员能够在早期识别异常情况。pencil beam的这一应用展示了它们在治疗和诊断程序中的重要性。在医学应用之外，pencil beam也在各个科学研究领域中得到应用。例如，在粒子物理学中，研究人员利用pencil beam粒子与靶材碰撞，从而研究基本相互作用，深入了解亚原子层面的现象。这些实验帮助科学家理解物质的构成和支配宇宙的力量。总之，pencil beam的概念在许多现代技术中都是不可或缺的，尤其是在医学和科学研究领域。它以精确的方式传递集中的能量，使其在医疗中的治疗和诊断以及实验物理学中变得无价。随着技术的不断进步，pencil beam的应用可能会进一步扩展，导致各个领域出现更多创新解决方案。理解pencil beam的重要性可以提供关于集中能量如何改变治疗方法和科学探索的见解，最终使整个社会受益。