I. Device Name: Dual-Energy X-ray Bone Densitometer
II. Device Functions:
Bone Mineral Density (BMD) Measurement: Lumbar spine, femur, forearm (T-score/Z-score analysis)
Whole-Body Body Composition Analysis: Precise bone mass evaluation, prevention, and diagnosis
 
III. Technical Parameters
1. X-ray System
1.1 Scanning Mode: Fan beam, continuous scanning
1.2 Measurement Sites: Lumbar spine, femur, forearm
1.3 Dual-Energy Generation: Dual-energy exposure (high/low kV switching)
1.4 X-ray Tube Voltage Range: 70–110 kV
1.5 Maximum Output Power: 275 W
1.6 Maximum Tube Current: 2.5 mA
1.7 Tube Current Modes:
 
Mode 1: 2.5 mA
 
Mode 2: 1 mA
 
Mode 3: 0.5 mA
1.8 Cooling System: Oil + air cooling
 
2. Detector
2.1 Detector Type: Gadolinium Oxysulfide (GOS) scintillation detector
2.2 Detector Channels: 16
3. Scanning System
3.1 Scan Bed Dimensions: Length 252 cm × Width 119 cm
3.2 Patient Weight Capacity: 210 kg
3.3 Maximum Scan Area: 202 cm × 60 cm
3.4 Scan Time per Site:
 
Lumbar spine: 21 sec
 
Femur: 21 sec
 
Forearm: 19 sec
3.5 Positioning: Laser-guided positioning
 
4. Calibration System
4.1 Calibration Time: 20 min per cycle
4.2 QC Software: Quality control test program + trend analysis
4.3 Calibration Module: QA phantom calibration
4.4 Repeatability: Coefficient of Variation (CV) ≤1%
4.5 Accuracy Deviation: ≤±5%
5. Software Package
5.1 Operating Software: Full Chinese interface
5.2 Multi-Site Integrated Reporting: Combines results from multiple sites into a single report
5.3 Reporting Software: Generates image/data reports with editing capabilities
5.4 Ethnic Databases: Chinese, Caucasian, African, Asian
5.5 Automated Bone Edge Detection: Auto-ROI (Region of Interest) definition
5.6 Real-Time Scan Adjustment: Fine-tune scan positioning via software
5.7 Trend Analysis: Long-term BMD tracking
5.8 DICOM 3.0 Support: Seamless PACS integration
6. Clinical Functions
6.1 Whole-Body Assessment & Body Composition Analysis:
 
Color-coded body composition mapping
 
Fat mass, lean tissue, muscle mass, fat percentage
6.2 Lumbar Assessment: AP lumbar spine measurement
6.3 Femur Assessment: Bilateral femur measurement
6.4 Forearm Assessment: Forearm measurement
6.5 Hip Analysis: Extended Gruen zonal analysis (19 zones)
6.6 Metal Artifact Reduction: Eliminates interference from prostheses, implants, etc.
6.7 One-Position Multi-Scan: Single positioning for lumbar spine + bilateral femurs
6.8 Camera-Assisted Positioning: Enhances patient alignment accuracy
6.9 Lateral Vertebral Assessment: BMD measurement and morphological analysis

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