percentage depth dose

简明释义

百分深度剂量

英英释义

例句

1.The radiologist calculated the percentage depth dose 百分比深度剂量 to determine the optimal radiation levels for the treatment.

放射科医生计算了百分比深度剂量 percentage depth dose以确定治疗的最佳辐射水平。

2.Calculating the percentage depth dose 百分比深度剂量 is essential for planning external beam radiation therapy.

计算百分比深度剂量 percentage depth dose对于规划外部束放射治疗至关重要。

3.Understanding the percentage depth dose 百分比深度剂量 is crucial for ensuring effective cancer treatment.

理解百分比深度剂量 percentage depth dose对于确保有效的癌症治疗至关重要。

4.The treatment plan was adjusted based on the percentage depth dose 百分比深度剂量 measurements from previous sessions.

治疗方案根据之前疗程的百分比深度剂量 percentage depth dose测量结果进行了调整。

5.In brachytherapy, the percentage depth dose 百分比深度剂量 helps in assessing the distribution of radiation in tissue.

在近距离放射治疗中，百分比深度剂量 percentage depth dose有助于评估辐射在组织中的分布。

作文

In the field of radiation therapy, understanding the concept of percentage depth dose is crucial for optimizing treatment plans. The percentage depth dose (often abbreviated as PDD) refers to the amount of radiation dose delivered to a specific depth in a tissue or medium compared to the dose delivered at a reference depth, typically the surface or a defined point. This parameter is essential for ensuring that the tumor receives an adequate dose while minimizing exposure to surrounding healthy tissues.The significance of percentage depth dose lies in its ability to inform clinicians about how radiation behaves as it penetrates through different types of tissues. As radiation travels through matter, it loses energy, and thus, the dose decreases with increasing depth. The percentage depth dose helps in quantifying this loss, allowing medical professionals to adjust their treatment techniques accordingly.For instance, when planning a radiotherapy session, oncologists must consider the depth of the tumor within the body. A tumor located just beneath the skin may require a different approach than one that is deeper within the abdomen. By using the percentage depth dose, they can determine how much radiation will reach the tumor at various depths and modify the radiation beam's intensity and angle to ensure optimal delivery.Moreover, the percentage depth dose is not only important for external beam radiation therapy but also plays a vital role in brachytherapy, where radioactive sources are placed inside or very close to the tumor. In these cases, understanding the percentage depth dose helps in calculating the appropriate dose distribution around the source, ensuring that the tumor receives the maximum dose while protecting adjacent normal tissues.The calculation of percentage depth dose typically involves measuring the dose at various depths and then expressing these measurements as a percentage of the dose at the reference depth. This process often requires sophisticated equipment and techniques, including ionization chambers and dosimetry systems, to obtain accurate readings. The data gathered can then be represented graphically, providing a visual representation of how the dose decreases with depth.Furthermore, advancements in technology have led to the development of computer-based treatment planning systems that incorporate percentage depth dose data. These systems allow for more precise calculations and simulations, enabling clinicians to visualize dose distributions and make informed decisions regarding treatment strategies.In conclusion, the concept of percentage depth dose is fundamental in the field of radiation therapy. It provides essential information that aids in the effective planning and delivery of radiation treatments, ultimately improving patient outcomes. By understanding the dynamics of radiation dose distribution, healthcare professionals can ensure that they deliver the most effective treatment while minimizing risks to healthy tissues. As technology continues to evolve, the role of percentage depth dose will undoubtedly remain critical in advancing cancer treatment methodologies.

在放射治疗领域，理解百分比深度剂量的概念对于优化治疗方案至关重要。百分比深度剂量（通常简称为PDD）指的是在特定深度处相对于参考深度（通常是表面或定义点）所传递的辐射剂量与所传递的剂量的比值。这个参数对于确保肿瘤获得足够的剂量，同时尽量减少对周围健康组织的照射至关重要。百分比深度剂量的重要性在于它能够告知临床医生辐射在穿透不同类型组织时的行为。随着辐射穿过物质，它会失去能量，因此，随着深度的增加，剂量会减少。百分比深度剂量有助于量化这种损失，使医疗专业人员能够相应调整治疗技术。例如，在计划放疗时，肿瘤科医生必须考虑肿瘤在体内的深度。位于皮肤下方的肿瘤可能需要与位于腹部更深处的肿瘤不同的方法。通过使用百分比深度剂量，他们可以确定在不同深度肿瘤将接收到多少辐射，并调整辐射束的强度和角度，以确保最佳的剂量输送。此外，百分比深度剂量不仅对外部放射治疗重要，在近距离放射治疗中也发挥着至关重要的作用，其中放射性源被放置在肿瘤内部或非常靠近肿瘤的位置。在这些情况下，了解百分比深度剂量有助于计算源周围的适当剂量分布，确保肿瘤获得最大剂量，同时保护邻近的正常组织。百分比深度剂量的计算通常涉及在不同深度测量剂量，然后将这些测量值表示为参考深度剂量的百分比。这个过程通常需要复杂的设备和技术，包括电离室和剂量测量系统，以获得准确的读数。收集的数据可以图形化表示，提供剂量随深度变化的可视化表示。此外，技术的进步导致了基于计算机的治疗计划系统的发展，这些系统结合了百分比深度剂量数据。这些系统允许更精确的计算和模拟，使临床医生能够可视化剂量分布，并做出明智的治疗策略决策。总之，百分比深度剂量的概念在放射治疗领域是基础性的。它提供了对有效规划和实施放射治疗至关重要的信息，最终改善了患者的预后。通过理解辐射剂量分布的动态，医疗专业人员可以确保他们提供最有效的治疗，同时尽量减少对健康组织的风险。随着技术的不断发展，百分比深度剂量在推进癌症治疗方法中的作用无疑将仍然至关重要。