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Record 48 of 1547
Visualizing ultrasound through computational modeling
Author and Affiliation:
Guo, Theresa W.(Massachusetts Inst. of Tech., Mechanical Engineering, MA, United States)
Abstract: The Doppler Ultrasound Hematocrit Project (DHP) hopes to find non-invasive methods of determining a person s blood characteristics. Because of the limits of microgravity and the space travel environment, it is important to find non-invasive methods of evaluating the health of persons in space. Presently, there is no well developed method of determining blood composition non-invasively. This projects hopes to use ultrasound and Doppler signals to evaluate the characteristic of hematocrit, the percentage by volume of red blood cells within whole blood. These non-invasive techniques may also be developed to be used on earth for trauma patients where invasive measure might be detrimental. Computational modeling is a useful tool for collecting preliminary information and predictions for the laboratory research. We hope to find and develop a computer program that will be able to simulate the ultrasound signals the project will work with. Simulated models of test conditions will more easily show what might be expected from laboratory results thus help the research group make informed decisions before and during experimentation. There are several existing Matlab based computer programs available, designed to interpret and simulate ultrasound signals. These programs will be evaluated to find which is best suited for the project needs. The criteria of evaluation that will be used are 1) the program must be able to specify transducer properties and specify transmitting and receiving signals, 2) the program must be able to simulate ultrasound signals through different attenuating mediums, 3) the program must be able to process moving targets in order to simulate the Doppler effects that are associated with blood flow, 4) the program should be user friendly and adaptable to various models. After a computer program is chosen, two simulation models will be constructed. These models will simulate and interpret an RF data signal and a Doppler signal.
Publication Date: Jan 01, 2004
Document ID:
20050186857
(Acquired Jul 14, 2005)
Subject Category: AEROSPACE MEDICINE
Document Type: Conference Paper
Publication Information: Research Symposium I; (SEE 20050186794)
Meeting Sponsor: NASA Glenn Research Center; Cleveland, OH, United States
Financial Sponsor: Massachusetts Inst. of Tech.; Mechanical Engineering; MA, United States
Organization Source: Massachusetts Inst. of Tech.; Mechanical Engineering; MA, United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ULTRASONICS; COMPUTER PROGRAMS; BLOOD; MICROGRAVITY; TRANSDUCERS; RADIO FREQUENCIES; AEROSPACE ENVIRONMENTS; BLOOD FLOW; HEMATOCRIT; HEALTH
Availability Notes: Abstract Only; Available from STI Support Services only as part of the entire parent document
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