Wireless vs fixed DR detectors: how to choose the right detector
Choosing a digital radiography (DR) detector comes down to three questions: wireless or fixed, which size, and which performance level fits your workload and budget.
Wireless or fixed?
Wireless detectors run on a rechargeable battery and connect to the workstation over Wi-Fi. One detector can be used in the table bucky, the wall stand and for tabletop or cross-table exams, which makes it the most flexible choice for single-room upgrades, urgent care, orthopedic and chiropractic practices, and mobile X-ray.
Fixed (wired) detectors stay in one position, such as a dedicated wall stand or table, and connect by cable. There are no batteries to charge or swap, which suits high-volume rooms where the detector never needs to move. The Canon CXDI-420C Fixed is a 17 x 17 in fixed detector.
Wireless detectors used all day are usually supplied with two batteries and a battery charger, so one battery charges while the other is in use.
Which detector size?
- 14 x 17 in: the standard size for most general radiography, and it fits standard bucky trays. Examples: CXDI-702C, CXDI-720C, CXDI-703C.
- 17 x 17 in: a larger square field that covers chest and abdomen without rotating the detector, popular for wall stands and large patients. Examples: CXDI-402C, CXDI-420C, CXDI-403C.
- 11 x 14 in: a smaller, lighter detector for extremities, pediatrics and tight positioning. Examples: CXDI-820C, CXDI-803C, CXDI-810C.
Canon CXDI detector families compared
| Family | Models | Pixel size | Dust and water rating | Highlights |
|---|---|---|---|---|
| CXDI-Elite | 720C, 820C, 420C (wireless); 420C Fixed | 125 µm | IP57 (wireless) | Highest DQE in the range (typical 74% at 0 lp/mm), 4-second cycle, built-in AEC Assistance |
| CXDI-Pro | 703C, 803C, 403C | 140 µm | IP55 | Cost-effective, lightweight, over 1,500 images per battery charge |
| CXDI-702C / 402C | 702C, 402C | 125 µm | IP55 | Ergonomic hand grips; uses the same battery charger as the CXDI-710C series |
| CXDI-710C series | 710C, 810C, 410C | 125 µm | IPX7 | Proven wireless platform, 4.0 lp/mm resolution |
Specifications are from Canon and may change. Each product page lists full specifications and a downloadable spec sheet. Browse all Canon DR detectors.
Other things to consider
- Software options: Intelligent NR (AI-based noise reduction) and scatter correction for non-grid exams can improve image quality and workflow.
- Durability: higher IP ratings mean better protection against fluids during cleaning and use.
- Weight: lighter detectors are easier for technologists to position all day.
- Pre-owned detectors: can lower cost for secondary rooms; ask about warranty and drop coverage.
Frequently asked questions
Is a 17 x 17 detector better than a 14 x 17?
Not always. A 17 x 17 detector covers a larger area without rotating, which helps with chest imaging and large patients, but it is heavier and may not fit every bucky tray. Many rooms use a 14 x 17 detector for the table and a 17 x 17 for the wall stand.
How many images does a wireless detector take per battery charge?
It depends on the model and workflow. Canon specifications range from up to 1,000 images at a 7-second cycle for the CXDI-702C to more than 1,500 for the CXDI-Pro, measured under Canon test conditions.
Can Canon CXDI detectors be added to non-Canon X-ray rooms?
Yes. With the right generator interface, Canon CXDI detectors can upgrade X-ray rooms from GE, Siemens, Philips, Shimadzu and other manufacturers.
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