Low cost ultrasound imaging device that uses optimal-lag pulse shaping filters

1999 ◽  
Author(s):  
M. Fomitchev ◽  
Y. Grigorashvily ◽  
S. Volkov
Keyword(s):  
Ultrasound Imaging ◽  
Pulse Shaping ◽  
Low Cost ◽  
Imaging Device

Experimental System Prototype of a Portable, Low-Cost, C-Scan Ultrasound Imaging Device

2008 ◽  
Vol 55 (2) ◽  
pp. 519-530 ◽  
Author(s):  
M.I. Fuller ◽  
K. Ranganathan ◽  
Shiwei Zhou ◽  
T.N. Blalock ◽  
J.A. Hossack ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Low Cost ◽  
Experimental System ◽  
Imaging Device ◽  
System Prototype

scholarly journals Ultrasound detection using optical interferometry

2021 ◽  
Author(s):  
Nusrat Jahan Surovy
Keyword(s):  
Thin Film ◽  
Ultrasound Imaging ◽  
Detection System ◽  
Incidence Angle ◽  
Low Cost ◽  
3D Ultrasound ◽  
Attractive Alternative ◽  
Simulation Results ◽  
Exerted Pressure ◽  
Piezoelectric Devices

Ultrasound imaging is a widely used noninvasive imaging technique for biomedical and other applications. Piezoelectric devices are commonly used for the generation and detection of ultrasound in these applications. However, implementation of two-dimensional arrays of piezoelectric transducers for 3D ultrasound imaging is complex and expensive. Optical Fabry-Perot interferometry is an attractive alternative to the piezoelectric devices for detection of ultrasound. In this method a thin film etalon is constructed and used. Light reflected from the two surfaces of this thin film produces an intensity which depends on the film thickness. When ultrasound is incident on the film, it changes the thickness of the film and consequently modulates the light intensity on the film. In our work, we made two types of etalon (Finesse 2) for our experiment. We detected lower frequency ultrasound (0.5 MHz or 1 MHz) using the build etalon. We determined a linear relationship between the strength of the optical signals and the exerted pressure on a film by the ultrasound. The dependence of the etalon performance on the light wavelength was demonstrated indirectly by measuring the signal at various light incidence angle. Simulation results are also presented. Lastly, we proposed the optimum design of this detection system based on the simulation results. This method of ultrasound detection can be a potential low-cost approach for 3D ultrasound imaging.

Biogenic Gas Vesicles for Ultrasound Imaging and Targeted Therapeutics

2021 ◽  
Vol 28 ◽  
Author(s):  
Rui Wang ◽  
Li Zhang ◽  
Mingxing Xie ◽  
Lufang Wang ◽  
Qiaofeng Jin ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Low Cost ◽  
Cell Metabolism ◽  
Drug Carriers ◽  
Ultrasound Contrast Agents ◽  
Targeted Therapeutics ◽  
Gas Vesicles ◽  
Biogenic Gas ◽  
Delivery Technique ◽  
Imaging Mode

: Ultrasound is not only the most widely used medical imaging mode for diagnostics owing to its real-time, non-radiation, portable, and low-cost merits, but also a promising targeted drug/gene delivery technique by exhibiting a series of powerful bioeffects. The development of micron-sized or nanometer-sized ultrasound agents or delivery carriers further makes ultrasound a distinctive modality in accurate diagnosis and effective treatment. In this review, we introduce one kind of unique biogenic gas-filled protein nanostructures called gas vesicles, presenting some unique characteristics than the conventional microbubbles. Gas vesicles can not only serve as ultrasound contrast agents with innovative imaging methods such as cross-amplitude modulation harmonic imaging but also can further be adjusted and optimized via genetic engineering techniques. Moreover, they could not only serve as acoustic gene reporters, acoustic biosensors to monitor the cell metabolism, but also serve as cavitation nuclei and drug carriers for therapeutic purposes. In this study, we focus on the latest development and applications in the area of ultrasound imaging and targeted therapeutics, and also provide a brief introduction of the corresponding mechanisms. In summary, these biogenic gas vesicles show some advantages over conventional MBs that deserve more efforts to promote their development.

Low-cost smartphone based imaging device to detect subsurface tissue oxygenation of wounds

2019 ◽  
Author(s):  
Kacie Kaile ◽  
Kevin Leiva ◽  
Jagadeesh Mahadevan ◽  
Ramnarayan V ◽  
Alonso Miguel ◽  
...  
Keyword(s):  
Tissue Oxygenation ◽  
Low Cost ◽  
Imaging Device

scholarly journals Speculum-Free Callascope for Cervical Self-Visualization: Acceptability, Feasibility, and Improved Awareness of the Reproductive System

2020 ◽  
Vol 6 (Supplement_1) ◽  
pp. 50-50
Author(s):  
Mary Elizabeth Dotson ◽  
Mercy Asiedu ◽  
Nimmi Ramanujam
Keyword(s):  
Cervical Cancer ◽  
Cancer Screening ◽  
Cervical Cancer Screening ◽  
Low Cost ◽  
Invasive Cervical Cancer ◽  
Imaging Device ◽  
Low Resource Settings ◽  
Low Resource ◽  
Attitudes And Practices ◽  
Home Based

PURPOSE Invasive cervical cancer is preventable, yet it affects 500,000 women worldwide each year, and more than one half these women die. Barriers to cervical cancer screening include a lack of awareness of cervical cancer and the cervix, fear of the speculum, and lack of women-centric technologies. We developed a low-cost (approximately $50), cervix-imaging device called the Callascope, which consists of an imaging component, camera, and inserter that obviates the need for a speculum and enables self-insertion. Studies are lacking regarding women’s willingness to independently image their cervix and women’s ability to effectively use the Callascope for self-imaging. METHODS We conducted two studies: in-depth interviews to assess the willingness to self-image the cervix, perceptions of the Callascope, and knowledge, attitudes, and practices toward cervical cancer screening; and home-based self-cervix imaging with the Callascope where women recorded an audio reflection on their experience. RESULTS Participants in interviews (n = 12) and home study (n = 12) all indicated a preference for the Callascope over the speculum. Interview data demonstrated that 53% of participants had little knowledge of basic reproductive anatomy, and only 17% of participants understood that human papillomavirus was a direct cause of cervical cancer. Self-exam data showed that 83% of participants were able to visualize their cervix with the Callascope on the first try and 100% were able to do so by the end of the study. Of participants, 100% indicated that the home exam was an empowering and informative experience. CONCLUSION The Callascope is more comfortable than the speculum and women are able to successfully image their cervices from home without the need for a speculum. With improved diagnostic capabilities, the Callascope could be used by medical providers for clinical exams, particularly in low-resource settings, as a low-cost and more comfortable alternative to the SOC. The Callascope enables home self-screening for cervical cancer and a better understanding of one’s body, which could make screening more accessible in low-resource settings.

Direct sampled I/Q beamforming for compact and very low-cost ultrasound imaging

2004 ◽  
Vol 51 (9) ◽  
pp. 1082-1094 ◽  
Author(s):  
K. Ranganathan ◽  
M.K. Santy ◽  
T.N. Blalock ◽  
J.A. Hossack ◽  
W.F. Walker
Keyword(s):  
Ultrasound Imaging ◽  
Low Cost

Analysis of Three-Dimensional Ultrasound in Diagnosis of Shoulder and Neck Inflammation and Surrounding Tissue Lesions

2021 ◽  
Vol 11 (3) ◽  
pp. 1028-1036
Author(s):  
Ziqiang Zhou
Keyword(s):  
Sensitivity And Specificity ◽  
Ultrasound Imaging ◽  
New Technologies ◽  
Imaging Modality ◽  
Imaging Techniques ◽  
Low Cost ◽  
Correct Diagnosis ◽  
Three Dimensional ◽  
Surrounding Tissue ◽  
Time Operation

Ultrasound imaging technology can not only show neck tear the degree and extent of disease, to help make the correct diagnosis, can also be used to assess shoulder neck inflammation after surgery to repair a shoulder muscle neck tissue integrity and healing. Ultrasound imaging with high-resolution, real-time operation, low cost, etc. gradually become shoulder neck inflammatory disease preferred imaging modality. The sensitivity and specificity for three-dimensional ultrasound imaging of shoulder neck inflammation were 78% and 93% in this study. The full-thickness inflammation sensitivity and specificity were 50% and 95%. The sensitivity and specificity of inflammation were 57% and 87%, respectively. This study shows that the diagnostic accuracy of 3D ultrasound imaging in shoulder and neck inflammation and surrounding tissue lesions is close to that of MRI. Three-dimensional appearance of new technologies such as ultrasound imaging will further improve ultrasound imaging techniques in shoulder neck inflammation application in the diagnosis and treatment assessment.

A Bi-Frequency Co-Linear Array Transducer for Biomedical Ultrasound Imaging

2014 ◽  
Author(s):  
Zhuochen Wang ◽  
Sibo Li ◽  
Ruibin Liu ◽  
Xuecang Geng ◽  
Xiaoning Jiang
Keyword(s):  
Real Time ◽  
Ultrasound Imaging ◽  
Linear Array ◽  
Low Cost ◽  
Large Field ◽  
Depth Of Field ◽  
Frequency Range ◽  
Non Invasive ◽  
Array Transducer ◽  
Conventional Ultrasound

Ultrasound imaging with high resolution and large field of depth has been increasingly adopted in medical diagnosis, surgery guidance and treatment assessment because of its relatively low cost, non-invasive and capability of real-time imaging. There is always a tradeoff between the resolution and depth of field in ultrasound imaging. Conventional ultrasound works at a particular frequency, with −6 dB fractional bandwidth of < 100%, limiting the resolution or field of depth in many ultrasound imaging cases. In this paper, a bi-frequency co-linear array covering a frequency range of 5 MHz-20 MHz was investigated to meet the requirements of resolution and depth of field for a broad range of ultrasound imaging applications. As a demonstration, a 31-element bi-frequency co-linear array was designed and fabricated, followed by element characterization and real time sectorial scan (S-scan) phantom imaging using a Verasonics system.

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