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　　The selection of low-contrast detail detection phantoms requires comprehensive consideration of detection needs, application scenarios, technical parameters and standardization requirements. Here are the key selection points:
 

　　1. Select according to the detection object and purpose
 

　　-Medical imaging systems (such as CR/DR, angiography machines):
 

　　- It is recommended to use PROMAM GOLD phantom, whose low-contrast detail panel size is 240mm×180mm×20mm and contains 256 grids (16 rows×16 columns), which can quantify details and contrast.
 

　　-Other special phantoms (such as the phantom with 18 low-contrast holes) are suitable for evaluating low-contrast resolution in a wide range, and are suitable for quality inspection of film shooting systems and digital imaging equipment.
 

　　-Industrial testing:
 

　　-Select a phantom with porous structure or slight contrast changes (such as a 405-hole phantom), which is suitable for detecting internal defects or fine structures of materials.
 

　　2. Pay attention to the technical parameters of the phantom
 

　　-Contrast range: The phantom should cover contrast values from low to high (such as 0.1~5) to evaluate the sensitivity of the device to different contrasts.
 

　　-Detail resolution: Choose a phantom that can provide multi-scale details (such as holes or grids of different diameters). For example, PROMAM GOLD's 256 grid can detect tiny details.
 

　　-Thickness and material: The thickness of the phantom needs to match the penetration capability of the equipment being tested (for example, X-ray phantoms are usually about 20mm), and the material should be similar to the test object (for example, medical phantoms mostly use acrylic or composite materials).
 

　　3. Consider actual application requirements
 

　　-Dynamic range test: If you need to evaluate the device's ability to adjust brightness and contrast, select a phantom that supports dynamic range analysis (such as a phantom with variable contrast holes).
 

　　-Multi-device compatibility: General-purpose phantoms (such as PROMAM series) are suitable for multiple devices (CT, DR, breast machines, etc.), while special-purpose phantoms (such as angiography phantoms) are optimized for specific scenarios.
 

　　4. Recommended phantom for low-contrast detail detection
 

　　-PROMAM GOLD: Suitable for medical X-ray equipment, providing standardized low-contrast detail detection.
 

　　-Porous phantom (such as 405 holes or 18 holes): suitable for industrial or scientific research scenarios, focusing on detail resolution.
 

　　-Standardized test card (such as star target or resolution test card): used for basic resolution verification and can be used as a supplementary tool.