CT机空间分辨率线对卡

Core Points - The article discusses the CT spatial resolution line pair card, a specialized testing tool for quantifying the spatial resolution of CT systems [5][13] - The product is customizable according to customer requirements, with a warranty period of 12 months [15] Product Overview - The spatial resolution line pair card is designed to evaluate the imaging capability of CT systems through the clarity of lead line pair arrays [5] - It includes high spatial frequency characteristics suitable for testing high-resolution CT systems, such as industrial CT [5] - The card features different designs, including line pair cards for high frequency and hole cards for specific structure resolution testing [5] Core Technology - The card utilizes a lead film gradient design with 0.05mmPb or 0.10mmPb lead equivalent strips, compatible with various energy X-ray penetration requirements (20kV-450kV) [6] - It covers a resolution range of 0.6-5.0 LP/MM, supporting stepwise calibration of CT systems [6] - The composite material packaging ensures stability and resistance to high temperatures (≤80℃) and organic solvent corrosion [6] Testing Methods - Static testing involves fixing the line pair card on the CT sample platform and performing a 360° rotation scan to assess isotropic resolution with an error margin of ≤3% [7] - Dynamic validation is conducted using DSA equipment to monitor the implantation of vascular stents in real-time, reducing motion artifact interference [8] Application Scenarios - The tool is applicable in industrial inspections for large components (diameter ≤2m) with a defect recognition sensitivity of 50μm [9] - It is also used in radiotherapy quality control to verify sub-millimeter nodule detection capabilities in CT scans, ensuring measurement errors of lung nodules are less than 2% [10] Quality Control Standards - The tool complies with national standards such as JJG 744-2004 and JJG 1078-2012 for X-ray radiation source verification [11] - It has been validated by CNAS laboratories for environmental resistance, including tolerance to 80% ethanol wipes and high-temperature sterilization [12]