DRX-Evolution Plus X-ray System, DRX-Compass Mobile X-ray System, Lux HD 35 detector, Lux HD 43 detector

This submission covers four devices: DRX-Evolution Plus and DRX-Compass stationary X-ray systems, and Lux HD 35 and Lux HD 43 digital flat panel detectors. These devices are used to obtain diagnostic quality radiographic images of various body parts (skull, spine, extremities, chest, abdomen) for general radiography, excluding mammography and dental applications. The systems consist of X-ray generators, tubes, collimators, patient support tables, and digital detectors with image acquisition and processing software.

The Lux HD detectors feature 100-micrometer pixel pitch, Cesium Iodide scintillators, TFT panel design, 16-bit analog-to-digital conversion, and Digital Exposure Control (DEC) wireless functionality for automatic exposure control. Key performance specs include 680-867 LSB/µGy sensitivity at RQA-5 beam, minimum DQE of 68% at 0.08 cyc/mm, and MTF exceeding 65% at 1.0 cyc/mm. The DRX systems integrate these detectors with ImageView 2.0 (B2.2) software supporting Smart Noise Cancellation (SNC) and Smart Virtual LLI features, maintaining the same fundamental X-ray generator, tube, and collimator components as predicate devices.

Not stated in this summary. No specific ISO, IEC, or ASTM standards are explicitly cited in the submission.

Substantial equivalence is established because the Lux HD detectors were previously cleared under K243556 and are now integrated into DRX systems with only minor software modifications to support DEC functionality. Clinical and non-clinical testing (including reader studies with board-certified radiologists and quantitative image quality analysis using NNPS, MTF, and contrast-detail curves) demonstrated that SNC-processed images are equivalent to or better than predicate device images. System verification and validation confirmed the integration does not raise new safety or effectiveness questions, and all critical system components and operating principles remain substantially unchanged from cleared predicate devices.