ADI data transformation in the area of new breakthrough may enhance MRI image quality

MRI (magnetic resonance imaging) scan can provide special clear body image, often used to diagnose a wide range of diseases and injuries, such as Alzheimer's disease, cancer and ligament tear, etc.

Analog Devices, Inc., a leading global provider of data conversion technology provider and medical imaging industry's long-term partners, the latest in data conversion areas announced a breakthrough helps clinicians and radiology doctors provide ultra clear image, help them see more small Anatomy and diseases such as breast cancer cells.

ADI's AD5791 high precision 20-bit digital-to-analog converter (DAC) is the industry's first truly 1ppm (one millionth) resolution and accuracy of DAC devices, its accuracy and resolution is higher than similar Converter 4 times.

Design of analog system 1ppm typically face a complex engineering technical challenges, needs to be more of a lower resolution of DAC and a large number of discrete devices and support IC, accompanied by considerable development risk and high cost of modification time to optimize circuit parameters, decrease errors and design complex automatic calibration circuits. AD5791 have the resolution and accuracy 1ppm, low noise (1ppm following), fast refresh rate (1us) and very low output drift (1ppm following), which can greatly simplify the design task, reduce development costs and reduce risk.

In the MRI System, this breakthrough technology not only improves image quality and can be applied to high-intensity magnetic intensity gradient for precise control, thereby achieving very high image resolution and contrast.

The use of low noise, low drift and high linearity performance AD5791, eliminates the need for system calibration cycle causes of MRI system frequently offline, effectively extending the working time of MRI System. The new converter also reduces the need for complex calibration algorithm, which can reduce engineering and system maintenance costs. In addition to the MRI System, suitable for the application of other AD5791 also includes: testing and measurement systems, high-end science and aviation instrument, communications equipment, and industrial control systems, etc.

Data conversion performance enhancements can help imaging system designers improve image clarity, speed up the doctor diagnosed early disease, thus achieving a timely treatment.

AD5791 DAC provides special low-noise performance, reduces image fake shadow, which can reduce the demand for MRI scan multiple times. In addition, the lower image error rate and higher reliability ensures less efficiently treat more patients.

Worldwide each year to complete more than 6000 million MRI examination.

MRI is a noninvasive technique that does not require the use of ionizing radiation method to obtain the body image and therefore diagnosis of injury and ideal for symptoms and MRI can properly adjust the examination content to address special imaging parameters (such as observation area).

"AD5791 for medical imaging system image definition, resolution and contrast establishes new benchmarks — this is to ensure that the Department of Radiology doctors quickly and accurately diagnose patients required system design requirements.

"ADI healthcare sector Vice President Patrick O ' Doherty said. "For the system architect, 1ppm performance level makes it possible for monolithic DAC architecture, which can effectively reduce the design dimension and reduce costs. This means that designers first opportunity to release most of the system error budget, savings of resources can be used for other key devices in the subsystem, or improve the overall performance of MRI. ”

20-bit AD5791 provides maximum ± 1 LSB relative accuracy indicators and maximum ± 1 LSB DNL indicators to guarantee the monotonicity of the output.

AD5791 has low frequency noise and 0.025ppm 0.05ppm/C output drift. Output range can be configured with standard single polarity (+ 5V, + 10V) or bipolar (± 5V, +/-10V) voltage. AD5791 using a common three-wire serial interface, working clock rate up to 50MHz.

AD5791 DAC is ADI for medical imaging system offers cutting-edge technology in the latest instance.

ADI recently released other medical devices including: ADAS1128 24-bit current to digital converter, a single-chip USB isolator ADuM4160 (universal serial bus isolator) and ultrasonic system AD927x series 8-channel receiver. These products as well as our other devices represent the analog devices specifically for healthcare imaging market development of today's most extensive portfolio of IC.

With the ageing of the population increase, the improvement of medical conditions, as well as the Chinese Government's massive investment in the healthcare industry and other supportive factors promoting, China electronic medical market especially high-end medical electronics market demand continues to grow.

These hospitals and specialized medical institutions of high-end medical equipment such as computer tomography (CT), magnetic resonance imaging (MRI), x-ray equipment, strong demand will inevitably brings medical electronic technology further development and prosperity. For high-end medical equipment market, abroad leading medical equipment vendors now also faces competition from domestic enterprises and Chase, China to set up research and development centers as well as the introduction of talents to enhance the ability of research and development of the Chinese market is to remain competitive advantage, ADI as medical electronic leading supplier in the field, will always adhere to improve people's lives this fundamental objective, is dedicated to providing excellent service of Chinese medical IC products.

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And supporting the use of devices AD5791 include: AD8276 and ADA4004-x series amplifier, ADP3331 regulator, ADP1864DC/DC step-down controllers and ADP121 linear regulator.