Navigation Links
Duke engineers develop new 3-D cardiac imaging probe

Biomedical engineers at Duke University's Pratt School of Engineering have created a new three-dimensional ultrasound cardiac imaging probe. Inserted inside the esophagus, the probe creates a picture of the whole heart in the time it takes for current ultrasound technology to image a single heart cross section.

The new probe has considerable potential not only for evaluating the condition of the heart, but also for use in guiding therapeutic treatment devices, the researchers said. The new Duke probe can also be used to image the esophagus, rectum, colon and prostate.

A peer-reviewed report on the work was published this month in volume 26 issue number 4 of the journal Ultrasonic Imaging. (Note: Because the journal's publication is backlogged, the issue date is 2004.)

The research is funded by the Heart, Lung and Blood Institute at the National Institutes of Health and by the National Science Foundation.

One form of ultrasound cardiac imaging, called transesophageal echocardiography (TEE), is conducted on hundreds of people each day in the United States. The technique entails inserting a probe down the patient's throat and behind the heart to capture ultrasound heart images. The images can reveal the condition of the heart chambers, valves, major blood vessels and heart tissue. TEE is a safe and fast diagnostic technique.

However, current TEE systems can quickly generate only two-dimensional cross-sectional images. This limitation makes it impractical for use in guiding therapeutic treatment devices such as ablation probes that burn off damaged cells that cause an irregular heart beat. Clinicians must repeatedly and painstakingly reposition the 2-D probe during treatments so, instead, they use fluoroscopy (X-ray movies) to guide the placement of the treatment devices. However, the use of X-ray imaging results in radiation exposure for patients and requires bulky lead-shielding garments for clinicians. In addition, such procedur es take up to seven hours to complete.

Biomedical engineering professor Stephen Smith, who specializes in ultrasound imaging, said a move to three-dimensional imaging is the next logical step.

"Three-D ultrasound is already an established technology in many hospitals," Smith said. "With our new real-time 3-D transesophageal probe, we have all the benefits of the 2-D TEE probe and none of the drawbacks. We can generate sharp, high-contrast images of the whole heart and position heart catheters and ablation devices at the same time. We have already done so in laboratory tests on animals."

Smith and his team, including biomedical engineering graduate student Chris Pua, developed the probe specifically for use in hospitals and clinics. For example, they used the outer casing of a commercially available 2-D TEE probe to house their new 3-D model. The casing design already has been tested and approved for use.

The new Duke 3-D probe is tipped with a dime-sized array of 504 individual ultrasound sensors. Each sensor is as wide as a few human hairs. "It took a craftsman to create this probe," said Smith. "Not many graduate students could have done what Chris Pua has done."

"Maintaining the size of normal TE probes was a main factor in the design since 3-D imaging inherently requires significantly more sensors than 2-D imaging," said Pua. "The original casing held enough cabling for 64 transducer elements whereas our design successfully incorporates 8 times that number."

The probe generates ultrasound at 5 million vibrations per second, which, combined with the 504 sensors, provides great sensitivity and a sharp image, Smith said. And because the image is large enough to encompass the whole volume of the heart, fewer "pictures" need to be taken. This may shorten patient time in clinics, he said.


'"/>

Source:Duke University


Related biology news :

1. MIT engineers an anti-cancer smart bomb
2. Scientists and engineers apply natures design to human problems
3. Bioengineers create stable networks of blood vessels
4. Rice bioengineers pioneer techniques for knee repair
5. UW-Madison engineers squeeze secrets from proteins
6. MIT engineers probe spiders polymer art
7. Boston University biomedical engineers win major grant for pursuit of the $1,000 Genome
8. A much-needed shot in the arm for HIV vaccine development
9. Clam embryo study shows pollutant mixture adversely affects nerve cell development
10. Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.
11. Scientists develop new color-coded test for protein folding
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/2/2016)... -- The Department of Transport Management (DOTM) of ... US Dollar project, for the , Supply and ... and IT Infrastructure , to Decatur ... of Identity Management Solutions. Numerous renowned international vendors participated in ... was selected for the most compliant and innovative solution. ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is ... partnership with VoicePass. By working together, ... experience.  Because VoiceIt and VoicePass take slightly different ... engines increases both security and usability. ... excitement about this new partnership. "This ...
(Date:4/28/2016)... India , April 28, 2016 ... Infosys (NYSE: INFY ), and Samsung SDS, a ... that will provide end customers with a more secure, ... services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... services, but it also plays a fundamental part in enabling ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created 4Sight Medical ... to the healthcare market. The company's primary focus is on new product introductions, ... strategies that are necessary to help companies efficiently bring their products to market. ...
(Date:6/27/2016)... , June 27, 2016   Ginkgo Bioworks , ... industrial engineering, was today awarded as one of ... of the world,s most innovative companies. Ginkgo Bioworks ... for the real world in the nutrition, health ... work directly with customers including Fortune 500 companies ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and fluorometers ... the 6000i models are higher end machines that use the more unconventional z-dimension of ... beam from the bottom of the cuvette holder. , FireflySci has developed several ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... is pleased to announce the launch of their brand, UP4™ Probiotics, into Target ... over 35 years, is proud to add Target to its list of well-respected ...
Breaking Biology Technology: