A5010217550- Photoacoustic and Ultrasonic Imaging
- Ultrasound Imaging and Elastography
- Ultrasound and Hyperthermia Applications
- Thermography and Photoacoustic Techniques
- Optical Imaging and Spectroscopy Techniques
- Balance, Gait, and Falls Prevention
- Botulinum Toxin and Related Neurological Disorders
- Trauma and Emergency Care Studies
- Simulation-Based Education in Healthcare
- Trauma, Hemostasis, Coagulopathy, Resuscitation
- Aortic Disease and Treatment Approaches
- Airway Management and Intubation Techniques
- Stroke Rehabilitation and Recovery
- Hemodynamic Monitoring and Therapy
- Ultrasonics and Acoustic Wave Propagation
- Mechanical Circulatory Support Devices
- AI in cancer detection
- Motor Control and Adaptation
- Infrared Target Detection Methodologies
- Diversity and Career in Medicine
- Cardiac Arrest and Resuscitation
- Muscle activation and electromyography studies
- Spinal Cord Injury Research
- Calibration and Measurement Techniques
- Tracheal and airway disorders
Johns Hopkins University
2020-2022
University of Delaware
2017-2019
Madigan Army Medical Center
2018
59th Medical Wing
2018
Brooke Army Medical Center
2018
Joint Base San Antonio
2018
United States Army Institute of Surgical Research
2017
The generalized contrast-to-noise ratio (gCNR) is a relatively new image quality metric designed to assess the probability of lesion detectability in ultrasound images. Although gCNR was initially demonstrated with images, theoretically applicable multiple types medical In this paper, applicability photoacoustic images investigated. computed for both simulated and experimental generated by amplitude-based (i.e., delay-and-sum) coherence-based short-lag spatial coherence) beamformers. These...
Abdominal surgeries carry considerable risk of gastrointestinal and intra-abdominal hemorrhage, which could possibly cause patient death. Photoacoustic imaging is one solution to overcome this challenge by providing visualization major blood vessels during surgery. We investigate the feasibility <italic>in vivo</italic> vessel for photoacoustic-guided liver pancreas surgeries. <italic>In photoacoustic in these two abdominal organs was successfully achieved after a laparotomy performed on...
Compared to traditional focused transmissions, plane wave (PW) ultrasound imaging has the potential enable higher frame rates, which is clinically relevant real-time applications and ultrafast imaging. However, when reducing number of PW transmissions reduce image formation times, confounded by quality degradation, acoustic clutter, speckle noise. To tackle this challenge, we present a deep learning-based method analyze raw radiofrequency (RF) channel data acquired probe convert signal final...
Photoacoustic imaging is a promising technique to provide guidance during multiple surgeries and procedures. One challenge with this that major blood vessels in the liver are difficult differentiate from surrounding tissue within current safety limits, which only exist for human skin eyes. In paper, we investigate of raising limit excited 750 nm laser wavelength approximately 30 mJ energy (corresponding 150 mJ/cm 2 fluence). Laparotomies were performed on six swine empirically potential...
Summary Airway simulators, or training manikins, are frequently used in research studies for device development and purposes. This study was designed to determine the anatomic accuracy of most low‐fidelity airway manikins. Computerised tomography scans ruler measurements were taken SynDaver ® , Laerdal AirSim These compared with human computerised (CT) (n = 33) from patients at University Michigan Medical Center previously published values. Manikin scored as a percentile among distribution...
Since its establishment in 1943, the US Army Institute of Surgical Research (USAISR) has facilitated development innovative tech-
Imaging of spinal cord microvasculature holds great potential in directing critical care management injury (SCI). Traditionally, contrast agents are preferred for imaging the vasculature, which is disadvantageous long-term monitoring injury. Here, we present FlowMorph, an algorithm that uses mathematical morphology techniques to segment non-contrast Doppler-based videos rat cord. Using segmentation, it measures single-vessel parameters such as flow velocity, rate, and radius, with visible...
Deep neural networks have demonstrated potential to both create images and segment structures of interest directly from raw ultrasound data in one step, through an end-to-end transformation. Building on previous work our group, subaperture beamformed IQ vivo breast cyst was the input a custom network that outputs parallel B-mode segmentation images. Our new model includes bright point line targets during training overcome limited field view challenges encountered with deep learning models,...
Pediatric casualties made up a significant proportion of patients during the recent military conflicts in Iraq and Afghanistan. Damage control resuscitation strategies used by physicians included rapid reversal metabolic acidosis to mitigate its pathophysiologic consequences, primarily through hemorrhage volume restoration. Alkalizing agents, including tris(hydroxymethyl)aminomethane (THAM), are potential therapeutic adjuncts treat acidosis. There is, however, limited published data on THAM...
Liver surgeries carry considerable risk of injury to major blood vessels, which can lead hemorrhaging and possibly patient death. Photoacoustic imaging is one solution enable intraoperative visualization has the potential reduce accidental these vessels during surgery. This paper presents our initial results a feasibility study, performed laparotomy procedures on two pigs, determine in vivo vessel visibility for photoacoustic-guided liver Delay-and-sum beamforming coherence-based were used...
Multiple image quality metrics are currently available to assess target detectability in photoacoustic images. Common include contrast, contrast-to-noise ratio (CNR), and signal-to-noise (SNR). The generalized (gCNR) is a relatively new metric the probability of detectability. This paper demonstrates applicability gCNR using simulated experimental images created with delay-and-sum (DAS), short-lag spatial coherence (SLSC), factor weighting combined DAS (GCF+DAS), minimum variance (MV)...
Channel signal-to-noise ratio (SNR) is a metric to assess photoacoustic image quality based on the raw channel data. Current methods for measuring SNR require access data or delay prior summation (e.g., DAS beamforming) in addition knowledge of noise profile differentiate signal from noise. However, pre-beamformed not always feasible with clinical ultrasound scanners, and profiles are typically available. This paper introduces new method calculating probability density functions (PDFs)...