S2Former-OR:用于OR中场景图生成的单阶段双模变压器
IEEE transactions on medical imaging
|August 15, 2024
概括
本研究介绍了S2Former-OR,这是一个新的单阶段框架,用于手术场景图形生成 (SGG). 它通过有效地结合2D和3D数据来提高手术室的智能,优于现有的方法.
科学领域:
- 计算机视觉 计算机视觉
- 人工智能的人工智能
- 医疗信息学 医疗信息学
背景情况:
- 场景图形生成 (SGG) 对手术室 (OR) 认知智能至关重要.
- 现有的SGG方法经常使用多阶段管道,限制了灵活性和有效性.
- 这些管道依赖于中间姿势估计和对象检测,损害了端到端的学习.
研究的目的:
- 引入一种新的单阶段双模变压器框架,S2Former-OR,用于手术场景图形生成.
- 以端到端的方式为SGG利用多视图2D场景和3D点云.
- 为了提高多式联运代表在最远地区的灵活性和有效性.
主要方法:
- 开发了一个单阶段双模转换器框架 (S2Former-OR).
- 实施了View-Sync传输方案,用于多视图视觉信息交互.
- 设计了一个几何-视觉凝聚力操作,以整合2D语义和3D点云功能.
- 提出了一个关系敏感的变压器解码器,用于直接预测实体对关系.
主要成果:
- 在4D-OR基准指标上,S2Former-OR表现出优异的SGG性能.
- 与现有的OR-SGG方法相比,精度提高了3个百分点.
- 模型参数减少了2420万,表明计算成本较低.
- 在综合性评估中,在综合性评估中始终优于通用单阶段SGG方法.
结论:
- S2Former-OR为手术场景图生成提供了有效和高效的端到端解决方案.
- 拟议的框架增强了OR应用的多式联络代表学习.
- 这种方法通过改进的SGG在手术室中提升了认知智能.
相关概念视频
Types Of Transformers
954
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
954
Equivalent Circuits for Practical Transformers
404
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
404
Transformers with Off-Nominal Turns Ratios
146
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
146
Three-Winding Transformers
216
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
216
The Ideal Transformer
369
In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's...
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's...
369
Per-Unit Sequence Models
73
An ideal Y-Y transformer, grounded through neutral impedances, displays per-unit sequence networks akin to those of a single-phase ideal transformer when subjected to balanced positive- or negative-sequence currents. These currents do not produce neutral currents, and their associated voltage drops.
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
73


