在宫瘤中,组织结构和强加的电流流之间的关系
B H Brown1, J A Tidy, K Boston
1Department of Medical Physics, University of Sheffield, Royal Hallamshire Hospital, UK. b.h.brown@sheffield.ac.uk
Lancet (London, England)
|February 7, 2001
概括
这项研究开发了一种新的查技术,用于使用电阻测量检测子宫癌前期检测. 该方法有效地区分正常和癌前宫组织,准确度高.
科学领域:
- 生物物理学的生物物理.
- 医疗成像医学成像
- 妇科瘤学 妇科瘤学
背景情况:
- 人体组织中的电流流是由细胞结构决定的.
- 电阻谱学可以揭示组织特征.
- 这项研究旨在开发一种用于宫癌前期癌症的查技术.
研究的目的:
- 开发和验证一种新的查技术,用于检测子宫癌前期.
- 评估电阻测量的能力,以区分正常和癌前宫组织.
主要方法:
- 在124名女性的子宫上从8个点测量电阻谱,使用笔探测器.
- 计算了对组织变化敏感的变量,并与镜结果进行了比较.
主要成果:
- 测量的电阻变化与预测的组织结构保持一致.
- 正常的状组织与癌前组织分离得很好.
- 接收器运行特征分析显示,在0.951的曲线下面的面积可以区分宫内皮质瘤等级2/3和正常组织,具有0.92的灵敏度和0.92的特异性.
结论:
- 电阻谱的特征与细胞排列和核大小相关.
- 组织结构可以从电阻谱测量得出.
- 这种方法有效地分离正常和癌前宫组织.
相关概念视频
Adaptive Mechanisms in Cancer Cells
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
The Tumor Microenvironment
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
Overview of Cell-Matrix Interactions
The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
Intracellular Signaling Affects Focal Adhesions
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
Magnetic Force Between Two Parallel Currents
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...
Induced Electric Fields: Applications
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...


