GB15208.4-2018
Micro-dose X-ray security inspection system—Part 4:Human body security inspection system
微剂量X射线安全检查设备 第4部分：人体安全检查设备
GB 15208.4-2018 is a current mandatory Chinese national standard for Micro-dose X-ray security inspection system—Part 4:Human body security inspection system. It appears in the Machinery compliance cluster with a product safety focus and has an implementation date of Dec 1, 2019.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the design, manufacturing, assembly, acceptance, and use of various micro-dose X-ray human body security inspection systems. It covers equipment used to detect dangerous or contraband items concealed on the human body. Please note that this standard explicitly excludes X-ray security inspection equipment utilizing Computed Tomography (CT) technology. It is highly relevant for manufacturers of transmission, backscatter, and combined human body scanners.
Technical requirements
GB 15208.4-2018 is a mandatory standard that comprehensively regulates the safety and performance of human body X-ray scanners. Manufacturers must ensure their equipment meets strict radiation dose limits for both general and special inspection modes. The standard sets precise thresholds for the maximum permissible dose per scan to protect the individuals being inspected. The standard defines critical imaging performance metrics, including material detection capability against human body and air backgrounds, wire resolution, and spatial resolution. It also specifies requirements for organic, inorganic, and mixture differentiation (for multi-energy systems) and grayscale resolution (for single-energy systems), ensuring operators can accurately identify threats. Additionally, it mandates that the single inspection time must not exceed a specified duration to guarantee operational efficiency. Beyond imaging and dose limits, the standard enforces rigorous environmental and safety requirements. Equipment must comply with referenced general requirements (GB 15208.1-2018) concerning electromagnetic compatibility, electrical safety, mechanical hazard prevention, and temperature limits. Strict boundaries for radiation workplace zones (control and supervised areas) must be established to protect operators and the public from cumulative radiation exposure.
Testing methods
Testing involves placing specific test bodies (phantoms) constructed from high-density polyethylene (HDPE) at a defined reference position to simulate human subjects. The standard outlines procedures for evaluating image quality metrics such as wire detection and spatial resolution using specialized test cards. Furthermore, it details methodologies for measuring radiation dose to the inspected subject and mapping the radiation levels at workplace boundaries using calibrated dosimeters and scattering bodies.
FAQs
What products are regulated under GB 15208.4-2018?
GB 15208.4-2018 specifically applies to micro-dose X-ray human body security inspection systems and explicitly excludes CT (Computed Tomography) X-ray inspection equipment. If your product is a transmission, backscatter, or combined system designed to scan humans for concealed items, this mandatory standard applies.
Are there specific equipment classifications mentioned in GB 15208.4-2018?
The standard classifies equipment by technology (transmission, backscatter, combined), material resolution (single-energy vs. multi-energy), and protection type (open vs. shielded). It also introduces distinct dose limits for general mode and special mode operations, along with specific testing methodologies using HDPE phantoms to simulate human subjects.
How does GB 15208.4-2018 compare to international standards like ISO or IEC?
GB 15208.4-2018 aligns conceptually with international guidelines such as IEC 62463 and ANSI N43.17, but it establishes its own strict, mandatory dose limits and highly specific testing body (phantom) configurations tailored for the Chinese market. Manufacturers must verify compliance with these specific Chinese test parameters rather than assuming ISO/IEC equivalence.
The summary above provides a high-level overview of GB 15208.4-2018. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 15208.4-2018 today to access all detailed parameters, dose calculation formulas, testing body schematics, and exact testing procedures.
Applicability hints
- Type
- Product
- CCS
- A91
- ICS
- 13.310
- Competent department
- Ministry of Public Security
- Technical committee
- National Technical Committee on Security Alarm Systems of Standardization Administration of China