Ultrasound System: Portable

Block Diagram (SBD) for a portable ultrasound machine using TI’s TMS320 family of processors for beamforming, preprocessing, back-end processing tasks with interface to TI’s Analog Front Ends, pulsers, and output DAC’s.

Block Diagram

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What's New

TI speeds ultrasound design and reduces board space by more than 50% with the TX810, the industry's first integrated transmit/receive switch

Similar to the fixed Ultrasound systems, portable ultrasound systems use an array of receivers to build an image by time shifting, scaling, and intelligently summing echo energy. However, the challenge with developing a portable system is maintaining a acceptable image quality while achieving portability in terms of size and runtime. Often this is accomplished by reducing the number of channels used in the device, trading off image quality and information for a reduction in power consumption and size.

The concept of time shifting and scaling, which is based on receiving signals from a transducer array, provides the ability to "focus" on a single point in the scan region. By subsequently focusing at different points, an image is assembled. Using more integrated solutions can help increase signal integrity and reliability. Using a HV pulsar which integrates the DAC, a low pass filter as well as an amplifier is an example of this, simplifying the filtering requirements and reducing the noise in the transmit signal chain. Likewise using the complete integrated analog portable ultrasound receive frontend reduces the noise and the number of components needed to support the channels used in the design.

Since the output is graphical in nature the use of a touch screen as an interface would allow for a large display while maximizing the use of space to ensure a smaller form factor. Using multiple TI DSPs like a C64XX coupled with an OMAP35XX would allow for a completely integrated backend. In addition to having a powerful core for video acceleration for the graphics display, a Cortex A8 processor will help to handle the management of the OS and touch screen interface which helps keep power consumption down by allowing for one of the processors to be powered down while not in use as well as eliminating another sub system. To compensate for the reduction of channels, post processing can be done to the image by delaying the image display while collecting more dada to render. This would give a more accurate image while trading off the ability to see the image in real-time as well as power consumption on the processor.

Power and Battery Management are key in this system, where key design considerations are ultra-low power consumption and high efficiency driven by the need for extended battery life, and high precision. Additional requirements may drive the need for recording the images, cabled or wireless interfaces for transmission of the images. Also, to enable ease of use, features like touch screen control and display backlighting are key to usability of the device. Adding all these features without significantly increasing power consumption is a huge challenge. Being a medical device it is also important to be able to monitor the amount of power left in the device. Texas Instruments portfolio of Processors, Instrumentation and Buffer Amplifiers, Power and Battery Management such as Impedance tracking and gas gauging, Audio Codecs, and both wired and wireless interface devices provides the ideal tool box for this system.

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Application Notes (9)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 29 Aug 2012 1168
HTM 9 KB 08 Jun 2010 167
HTM 8 KB 08 Jun 2010 89
HTM 9 KB 21 Sep 2009 1411
HTM 8 KB 03 Apr 2009 161
HTM 8 KB 18 Dec 2008 236
HTM 9 KB 07 Nov 2008 154
HTM 8 KB 19 Aug 2008 1646
HTM 9 KB 26 Jul 2007 749

Selection and Solution Guides

Selection Guides (5)

Title Abstract Type Size (KB) Date Views
PDF 9.09 MB 02 May 2013 2508
PDF 3.34 MB 02 May 2013 2062
PDF 3 MB 10 Apr 2013 2062
PDF 1.35 MB 07 Nov 2012 1386
PDF 2.38 MB 08 Jun 2010 709

Product Bulletin & White Papers

Product Bulletin (4)

Title Abstract Type Size (MB) Date Views
PDF 193 KB 08 Nov 2013 316
PDF 515 KB 09 Nov 2012 336
PDF 228 KB 09 Jun 2011 385
PDF 208 KB 25 Apr 2011 597

White Papers (16)

Title Abstract Type Size (MB) Date Views
PDF 98 KB 08 Apr 2013 723
PDF 202 KB 21 Feb 2013 936
PDF 1.09 MB 12 Nov 2012 482
PDF 652 KB 09 Oct 2012 201
PDF 914 KB 23 Feb 2012 184
PDF 1014 KB 17 May 2011 600
HTM 9 KB 16 Mar 2011 56
PDF 793 KB 16 Mar 2011 132
PDF 1.69 MB 06 Mar 2011 151
PDF 562 KB 21 Dec 2010 371
PDF 423 KB 09 Nov 2010 809
PDF 333 KB 08 Jun 2010 157
PDF 358 KB 18 Mar 2009 18
HTM 9 KB 11 Nov 2008 205
PDF 115 KB 03 Nov 2008 548
PDF 187 KB 31 Oct 2008 456

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