Image Sensor Solutions

DALSA Image Sensor Solutions

Sensors for X-Ray Imaging

In all domains of Medical and Scientific X-Ray imaging, replacement of legacy film and analog video processing by a fully digital workflow is underway. There are several drivers for this conversion, including increased operational efficiency and faster work flow (patient throughput), adoption of digital information workflow and archiving infrastructure in the hospitals and electronic sharing of results for peer reviews, the advanced digital image processing capabilities, and the lower X-ray dose and real-time availability that digital X-ray imaging solutions enable.

Medical Radiography

Several digital X-ray technologies exist, including computed radiography (CR), direct conversion and indirect detection. CR uses imaging plates consisting of scintillators and phosphors for exposure and reads the plates in a separate scanning operation (much like processing film); CR therefore cannot be used for real-time X-ray imaging such as cardio-vascular examinations. Direct conversion uses materials such as amorphous selenium to detect x-ray photons directly for immediate image output. Indirect detection uses scintillators (such as gadolinium oxides or cesium iodides) which convert x-rays to visible light, coupled to CCD or CMOS imagers to deliver high-quality, detail-rich  images.  full of detail

Each technology has tradeoffs in performance and cost, but regardless of technology X-ray detectors are judged by characteristics including sensitivity, noise, image contrast and resolution, as well as operational costs, stability and durability. In medical applications perhaps the most important X-ray detector imaging performance characteristic is detective quantum efficiency (DQE). High DQE (efficient use of incoming x-rays) is vital to minimizing patient dose and obtaining the best starting image to support further medical image processing and diagnosis.

Specimen Radiography

For small fields of view, DALSA high-sensitivity large CCDs feature very high light sensitivity, together with low dark current, low noise amplifiers and unparalleled linear dynamic range delivering unsurpassed image quality. The high output bandwidth and pixel binning capabilities enable high frame rates that support real-time image acquisition.

Dental Radiography

DALSA has significant experience in image sensors for dental radiography. Our CMOS designs offer features such as the ability to optimize ratio between outside dimensions and optical format or to determine the correct dose for each patient during the actual exposures to minimize retakes. We deliver radiation-hard designs for long device lifetime and optimal image quality, and we have access to housing technology designed for harsh environments with respect to shocks and vibrations and withstanding standard cleaning chemicals.

Capabilities

DALSA offers considerable expertise in indirect detectors as a result of many years of experience in multiple applications, working with different scintillators and coupling fiber-optics to CCD and CMOS imagers. We offer a range of pixel sizes and our optimized designs provide low noise and tremendous dynamic range for high contrast even at low X-Ray dose. Our large, buttable CMOS tiles can be assembled into panels of 30 x 24 cm and more.

For more information email sales.sensors@dalsa.com.

Technology Primer

CMOS X-Ray Imaging Brochure Download our technology primer on CMOS detectors for X-Ray imaging.

Products

Large CMOS X-Ray Panel
Six-tile x-ray panel, 30 cm x 20 cm

IA-DJ-02084 CCD

IA-DJ-02084: 4 Mpixels, 50 mm x 50 mm field of view, outstanding QE

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