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Dan Leotta

Senior Engineer

Email

dfleotta@apl.washington.edu

Phone

206-616-6787

Education

Bachelor of Science Bioengineering, Syracuse University, 1982

Master of Science Electrical Engineering, Massachusetts Institute of Technology, 1985

Doctor of Philosophy Bioengineering, University of Washington, 1998

Publications

2000-present and while at APL-UW

Evaluation of examiner performance using a duplex ultrasound simulator. Flow velocity measurements in dialysis access fistula models

Leotta, D.F., R.E. Ziegler, K. Sansom, A. Aliseda, M.D. Anderson, and F.H. Sheehan, "Evaluation of examiner performance using a duplex ultrasound simulator. Flow velocity measurements in dialysis access fistula models," Ultrasound Med. Biol., 44, 1712-1720, doi:10.1016/j.ultrasmedbio.2018.04.012, 2018.

More Info

1 Aug 2018

We developed a duplex ultrasound simulator for training and assessment of scanning skills. We used the simulator to test examiner performance in the measurement of flow velocities in dialysis access fistulas. Test cases were created from 3-D ultrasound scans of two dialysis access fistulas by reconstructing 3-D blood vessel models and simulating blood flow velocity fields within the lumens. The simulator displays a 2-D B-mode or color Doppler image corresponding to transducer position on a mannequin; a spectral waveform is generated according to Doppler sample volume location and system settings. Examiner performance was assessed by comparing the measured peak systolic velocity (PSV) with the true PSV provided by the computational flow model. The PSV measured by four expert examiners deviated from the true value by 7.8 ± 6.1%. The results indicate the ability of the simulator to objectively assess an examiner's measurement accuracy in complex vascular targets.

An upgraded camera-based imaging system for mapping venous blood oxygenation in human skin tissue

Li, J., X. Zhang, L. Qiu, and D.F. Leotta, "An upgraded camera-based imaging system for mapping venous blood oxygenation in human skin tissue," Opt. Commun., 370, 276-282, doi:10.1016/j.optcom.2016.03.030, 2016.

More Info

1 Jul 2016

Highlights

A camera-based mapping of venous oxygenation saturation SvO2 was further developed.

Monte Carlo method was used for modeling the imaging system.

Curvature and motion correction algorithms were included in the image process.

The spatial resolution for SvO2 map achieved was 1.25 mm×1.25 mm.

The measured SvO2 was validated by a NIRS system and in line with published data.

Development of a duplex ultrasound simulator and preliminary validation of velocity measurements in carotid artery models

Zierler, R.E., D.F. Leotta, K. Sansom, A. Aliseda, M.D. Anderson, and F.H. Sheehan, "Development of a duplex ultrasound simulator and preliminary validation of velocity measurements in carotid artery models," Vasc. Endovascular Surg., 50, 309-316, doi:10.1177/1538574416647502, 2016.

More Info

1 Jul 2016

Duplex ultrasound scanning with B-mode imaging and both color Doppler and Doppler spectral waveforms is relied upon for diagnosis of vascular pathology and selection of patients for further evaluation and treatment. In most duplex ultrasound applications, classification of disease severity is based primarily on alterations in blood flow velocities, particularly the peak systolic velocity (PSV) obtained from Doppler spectral waveforms. We developed a duplex ultrasound simulator for training and assessment of scanning skills.

More Publications

Inventions

Device and Method to Break Urinary Stones in Pets

Record of Invention Number: 48640

Mike Bailey, Dan Leotta, Elizabeth Lynch, Brian MacConaghy, Adam Maxwell

Disclosure

28 May 2019

Easy 3D Ultrasound Imaging and Volume Quantification

Record of Invention Number: 48367

Mike Bailey, Bryan Cunitz, Dan Leotta

Disclosure

28 May 2019

Transcranial Doppler Simulator for Training and Assessment

Record of Invention Number: 48515

Florence Sheehan, Alberto Aliseda, Mark Anderson, Dan Leotta, Kurt Sansom, Deepak Sharma

Disclosure

7 Jan 2019

More Inventions

Acoustics Air-Sea Interaction & Remote Sensing Center for Environmental & Information Systems Center for Industrial & Medical Ultrasound Electronic & Photonic Systems Ocean Engineering Ocean Physics Polar Science Center
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