What are the performance specifications of medical X-ray detectors

The core performance specifications of medical X-ray detectors are categorized into three major groups: image quality, dose-related parameters, and application adaptability. Aligned with your international promotion scenarios for medical and veterinary imaging equipment, the key specifications are detailed as follows:

‌Core Imaging Performance Metrics‌
‌Spatial Resolution (Modulation Transfer Function, MTF)‌: It quantifies the detector’s capability to resolve tiny anatomical details. For high-resolution mammography applications, models with slower MTF attenuation at high spatial frequencies are highly recommended.
‌Detective Quantum Efficiency (DQE)‌: It represents the X-ray signal utilization efficiency of the detector. A higher DQE value means lower required radiation dose to achieve the same diagnostic image quality.
‌Noise Power Spectrum (NPS)‌: It directly determines the background noise level of the output image, and serves as the fundamental parameter for DQE calculation.

‌Dose & Measurement Specifications‌
The dose measurement range spans from 50 nGy to 50 Gy with an accuracy of ±5%, fully compatible with routine radiography, fluoroscopy, dental and other clinical scenarios.
The kVp adaptation range covers 40 kV to 160 kV, while dedicated mammography models support a low-voltage range of 22 kV to 48 kV.
The exposure time supports a wide adjustment range from 0.2 ms to 300 s, meeting the duration requirements of various clinical examinations.

‌Other Key Adaptability Specifications‌
The mainstream energy response range is 20 keV to 3 MeV, covering the X-ray energy spectrum for the vast majority of clinical diagnostic applications.
Temporal response parameters include rise time τr, fall time τf and other indicators. Different scenarios require corresponding response speeds: CT applications demand nanosecond-level response, while general radiography adapts well to millisecond-level response.

 

Author：Newheek-Detector