简介(Introduction)
X-ray phase contrast imaging (XPCI) is a cutting-edge technology that can "see" soft tissue details clearly. It demonstrates unique advantages in areas where traditional X-ray absorption imaging is not effective. The table below summarizes its core advantages and application areas, helping you quickly establish a comprehensive understanding.
Typical Applications
| NO. | medical field | Industrial and security field |
| Core technological advantages | Improve soft tissue contrast and reduce radiation dose | Clear imaging of weakly absorbing materials such as plastics and carbon fibers |
| Typical Applications | Cancer surgery: Accurately determining the cutting edge during surgery to reduce the rate of secondary surgery; Chest imaging: achieving low-dose lung screening | Non destructive testing: Testing the internal structure of batteries and composite materials Safety check: effectively distinguish materials of different densities |
| imaging effect | Can clearly display soft tissue details such as tumor strands and glands | Distinguishable internal defects in lightweight materials that are difficult to distinguish with traditional X-rays |
Interpretation of Technological Advantages
The strength of X-ray phase contrast imaging lies in its innovative approach, capturing subtle changes in the phase of X-rays passing through an object, rather than just intensity attenuation (i.e. traditional absorption imaging). This brings several core advantages:
Extremely high sensitivity: For objects composed of light elements (i.e. low atomic number materials), such as humansoft tissues, plastics, carbon fibers, etc., the change in X-ray phase is usually thousands of times greater than absorption. Therefore, XPCI can reveal microstructures and details inside these substances that were previously difficult to observe.
Lower radiation dose: In order to achieve high contrast, traditional absorption imaging sometimes requires an
increase in radiation intensity. The high sensitivity of XPCI makes it possible to obtain high-quality images at lower radiation doses. A study on adult breast models shows that this technology has the potential to even reduce the dose to 1/160 of traditional methods, which is significant in scenarios that require repeated examination.
Excellent edge enhancement effect: Phase changes are most significant at the boundaries of objects, which gives XPCI images a natural edge enhancement effect. In medicine, this helps to clearly outline the boundaries of tumors; In industry, it can highlight defects such as cracks and delamination inside the material.
Global Development Status
XPCI technology is rapidly moving from the laboratory stage relying on large scientific devices to commercialization and clinical applications, with a diversified technological path.
In order to break free from dependence on synchrotron radiation sources (although they can provide the highest quality images), researchers have developed various techniques suitable for ordinary laboratory X-ray generator.
Coaxial phase contrast imaging (PB-XPCI): This is the simplest structured method that does not require complex optical components and can be achieved solely through the free space propagation and coherence of X-rays. Yirui Technology and other companies are committed to commercializing this solution.
Grating differential phase contrast imaging: This method has high sensitivity, but it requires extremely strictprocessin technology and high cost for the key optical component - absorption grating. Currently, researchers are exploring new approaches such as using bismuth materials to reduce costs.
Edge Illumination (EI-XPCI): This technology performs well in scanning speed and system stability. By optimizing the algorithm, fresh breast specimens can be scanned within 15 minutes, meeting the need for rapid intraoperative diagnosis.
From laboratory to market
Breakthrough in medical application: In breast conserving surgery for breast cancer, the XPCI micro CT technology has increased the sensitivity of tumor detection at the margin of the incision by 2.6 times compared with traditional radiography of specimens, which is expected to significantly reduce the rate of secondary surgery. At the same time, it has also shown great potential in fields such as lung screening.
Industrial and security inspection landing: Technology has been commercialized in specific fields. For example, KA Imaging of Canada has launched the inCiTe 2.0 3D X-ray micro CT system, which integrates dual energy imaging and phase contrast imaging functions and can be used for non-destructive testing of aerospace components, batteries, and building materials.
Cost control and popularization: The localization of core components and the application of new materials are key to reducing system costs. As companies like Yirui Technology that master the core components of "light source+detector" promote integrated solutions, the threshold for XPCI technology is gradually decreasing.
summary
Overall, X-ray phase contrast imaging is opening up in the fields of precision medicine and high-end industrial testindue to its ultra-high sensitivity and low-dose potential in detecting weakly absorbing materials
Create an irreplaceable track. Although this technology is still on the path of popularization, diversified technological paths and continuous innovation are accelerating its pace from top laboratories to broader markets.
