When purchasing medical DR (Digital Radiography) equipment, what aspects should hospitals consider to evaluate its performance? What are the main technical parameters of DR?
Perlove Medical, a leading domestic DR manufacturer, recommends analyzing the equipment from multiple dimensions, including imaging performance, core components, mechanical structure, and overall functionality. Below is a classification of key parameters:
1. Detector System
Material and Type
- Amorphous silicon (a-Si) or amorphous selenium (a-Se) flat-panel detectors paired with cesium iodide scintillators.
- Wireless transmission design, supporting portable use.
Physical Parameters
- Effective area ≥ 17×17 inches (43×43 cm) to ensure full-body imaging coverage.
- Pixel size ≤ 140μm, matrix ≥ 3K×3K, and total pixels ≥ 9 million to enhance detail resolution.
Imaging Performance
- Dynamic range ≥ 14-bit, supporting wide grayscale display.
- Maximum spatial resolution ≥ 3.6 lp/mm to ensure the identification of small lesions.
2. High-Voltage Generator
Output Capability
- High-frequency power ≥ 50kW to meet high-load imaging demands.
- Tube voltage range: 40-150kV, tube current: 25-630mA, mAs output ≥ 500mAs, adaptable to different body types and anatomical regions.
Control Functions
- Supports Automatic Exposure Control (AEC), adjusting parameters through detector feedback without the need for a physical ionization chamber.
- Exposure time as low as 1ms to minimize motion artifacts.
3. X-ray Tube
Heat Capacity & Focal Spot
- Anode heat capacity ≥ 200KHU, tube heat capacity ≥ 1.1MH, ensuring stable continuous operation.
- Dual-focus design (e.g., 0.6mm/1.2mm) to balance high resolution and high power requirements.
Mechanical Structure
- Ceiling-suspended system with a rail-mounted design, supporting horizontal and vertical motorized movement with a travel range ≥ 2200mm.
The high-voltage generator and X-ray tube are the core components of medical DR equipment, with related manufacturing technologies historically dominated by foreign manufacturers. Since 2003, Perlove Medical has been deeply engaged in the field of medical X-ray equipment, mastering the R&D and production of key components such as X-ray tubes and high-frequency high-voltage generators. By breaking the monopoly of imported technologies, Perlove Medical has redefined the industry landscape with high reliability and low maintenance costs, continuously driving advancements in medical imaging technology.
4. Mechanical Structure
Motion System
- Detector and X-ray tube synchronized tracking, with motorized column lifting and automatic transition between standing and supine positions to enhance operational efficiency.
- Supports multiple projection angles, including standing, supine, and oblique positions, to accommodate complex positioning requirements.
Human-Machine Interaction
- Integrated touchscreen control for adjusting exposure parameters, patient body type classification, and ionization chamber field selection.
5. Image Processing & Performance Indicators
Processing Technology
- Data depth above 14-bit, supporting real-time image preview and dynamic range optimization.
- Automatic gain correction and noise reduction algorithms to enhance image uniformity.
Quality Standards
- Low-contrast resolution ≤ 2%, ensuring high-quality imaging.
- Image uniformity error ≤ 2.2%, minimizing artifact interference.
- Ghosting elimination rate ≥ 99.9%, preventing overlap of previous and current images.
6. Whole-System Certification & Compatibility
- Must pass China Environmental Labeling Certification and be selected as a domestic medical device to ensure compliance with environmental and quality standards.
- Core components such as the high-voltage generator and detector should be produced by the same manufacturer to ensure system compatibility.
These parameters collectively determine the imaging quality, operational efficiency, and clinical adaptability of DR equipment. When selecting a system, a comprehensive evaluation should be conducted based on specific clinical needs.
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