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相关概念视频

Types of Building Stone01:30

Types of Building Stone

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Building stones, essential materials for construction, are extracted from natural rock deposits and processed into specific forms and dimensions suitable for various building applications. These stones are broadly classified into three types based on their geological formation: igneous, sedimentary, and metamorphic.
Igneous rocks are formed from the solidification of magma or lava. An example is granite, known for its durability and resistance to weathering, making it ideal for parts of...
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Quarrying of Stone01:15

Quarrying of Stone

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Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the...
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Stone Masonry01:29

Stone Masonry

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Stone masonry is a construction technique that uses individual stones to build structures and can be categorized into two main types: rubble and ashlar. Rubble masonry uses uneven, naturally shaped stones such as river rocks or fragments from quarries. This method often requires the mason to select and possibly shape each stone to fit the designated space, ensuring a proper build, even with irregular stone sizes and shapes. Ashlar masonry, on the other hand, employs uniformly cut stones that...
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Global Climate Change01:50

Global Climate Change

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Work Done During Volume Change01:17

Work Done During Volume Change

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In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process.
Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr.
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Net Change Theorem01:22

Net Change Theorem

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The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application...
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Guidelines and Experience Using Imaging Biomarker Explorer IBEX for Radiomics
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评估基线和随访CT上的石块负荷变化:放射科医生和放射学评估

Parisa Kaviani1,2, Matthias F Froelich1,3, Bernardo Bizzo1,2

  • 1Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA.

Journal of imaging
|January 27, 2026
PubMed
概括
此摘要是机器生成的。

一种自动化的人工智能 (AI) 体积方法在后续的CT扫描中准确量化结石负荷变化. 这种人工智能方法超越了放射学家的定性评估和放射学来评估石头负担.

关键词:
计算机断层扫描 (CT) 是一种计算机断层扫描.结石是什么意思? 结石是什么意思?结石负担的负担脏结石:脏结石是指脏中的结石.

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科学领域:

  • 医学成像医学成像
  • 医学中的人工智能
  • 腎臟病學 (nephrology) 是一種醫學專業.

背景情况:

  • 对随访CT进行结石负担评估对于患者管理至关重要.
  • 放射学家的定性评估和放射学在准确评估石材负荷变化方面存在局限性.
  • 基于人工智能 (AI) 的自动化体积方法提供了潜在的改进.

研究的目的:

  • 为了比较基于人工智能的体积测量方法的诊断准确性与放射科医生的评估和放射学来评估随访CT上的石负担变化.
  • 为了确定自动体积定量是否优于传统方法.

主要方法:

  • 这是一项回顾性研究,包括157名基线和后续非对比性腹骨CT扫描的患者.
  • 索引测试:基于人工智能的原型 (Frontier,西门子Healthineers) 用于自动脏和石头细分,提供体积数据.
  • 参考标准:石材负载变化的值定义体积评估.
  • 放射科医生的表现通过临床报告和独立审查来评估.

主要成果:

  • 人工智能自动体积评估确定了稳定,增加或减少的石头负担.
  • 放射科医生的定性评估显示诊断性能较差 (AUC为0.55-0.72).
  • 基于AI值的体积定量证明了比定性评估和放射学更高的诊断准确性.

结论:

  • 基于值的自动体积量化测量结石负担比定性放射科医生评估和放射学更准确.
  • 人工智能驱动的体积分析提供了一种可靠的方法来评估随访CT上的石负担变化.
  • 这种人工智能方法提高了结石监测的诊断准确性.