Samuel Emil Schmidt

M.Sc.Biomedical Engineering & Informatics, PhD

  • Fredrik Bajers Vej 7, C1-204

    9220 Aalborg Ø

    Denmark

  • Denmark

20072020
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Research Output 2007 2019

2019

Cardiac Mechanical Signals

Casanella, R., Khosrow-khavar, F., Schmidt, S., Zanetti, J. & Tavakolian, K., 13 Feb 2019, Cardiovascular Computing—Methodologies and Clinical Applications. Golemati, S. & Nikita, K. S. (eds.). Singapore: Springer Publishing Company, p. 63-79 17 p.

Research output: Contribution to book/anthology/report/conference proceedingBook chapterResearch

Danish study of Non-Invasive testing in Coronary Artery Disease 2 (Dan-NICAD 2): study design for a controlled study of diagnostic accuracy

Rasmussen, L. D., Winther, S., Westra, J., Isaksen, C., Ejlersen, J. A., Brix, L., Kirk, J., Urbonaviciene, G., Søndergaard, H. M., Hammid, O., Schmidt, S. E., Knudsen, L. L., Madsen, L. H., Frost, L., Petersen, S. E., Gormsen, L. C., Christiansen, E. H., Eftekhari, A., Holm, N. R., Nyegaard, M. & 3 othersChiribiri, A., Bøtker, H. E. & Böttcher, M., 2019, In : American Heart Journal.

Research output: Contribution to journalJournal articleResearchpeer-review

Pre-test probability prediction in patients with a low to intermediate probability of coronary artery disease: a prospective study with a fractional flow reserve endpoint

Christiansen, E. H., Erik, B. H., Westra, J., Holm, N. R., Winther, S., Knudsen, L. L., Madsen, L. H., Nissen, L., Morten, B., Bouteldja, N., Schmidt, S. E., Urbonaviciene, G. & Frost, L., 1 Apr 2019, (Accepted/In press) In : European Heart Journal Cardiovascular Imaging.

Research output: Contribution to journalJournal articleResearchpeer-review

Coronary Artery Disease
Prospective Studies
Diamond
Calibration
Calcium

Quantitative Parameters of High-Frame-Rate Strain in Patients with Echocardiographically Normal Function

Andersen, M. V., Moore, C., Søgaard, P., Friedman, D., Atwater, B. D., Arges, K., LeFevre, M., Struijk, J. J., Kisslo, J., Schmidt, S. E. & von Ramm, O. T., 14 Feb 2019, In : Ultrasound in Medicine & Biology.

Research output: Contribution to journalJournal articleResearchpeer-review

strain rate
Heart Ventricles
myocardium
Myocardium
time measurement

RISK DETERMINATION OF CORONARY ARTERY DISEASE

Schmidt, S. E., 2 May 2019, IPC No. A61B 5/ 024 A N, Patent No. WO2019081630, Priority date 26 Oct 2017, Priority No. EP20170198552

Research output: PatentResearch

Open Access
coronary artery disease
acoustics
heart rate
indication
recording
2018
2 Citations (Scopus)
1 Downloads (Pure)

Aliasing artefact index for image interpolation quality assessment

Rukundo, O. & Schmidt, S., 7 Nov 2018, Optoelectronic Imaging and Multimedia Technology V. SPIE - International Society for Optical Engineering, 108171E. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10817).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Interpolation
Medical imaging
Image quality
Monitoring
Experiments

Cost analysis for ultra-sensitive phonocardiography used as primary test for coronary artery disease in Germany

Wahler, S., Schmidt, S. E., Müller, A. & Winther, S., 2018, In : Clinical Research in Cardiology. 107, Suppl. 3, 1 p.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Open Access

Cost-Cost Model for Ruling Out Coronary Artery Disease in Symptomatic Patients with Ultra-Sensitive Phonocardiography in the German Ambulatory Sector

Wahler, S., Winther, S., Müller, A. & Schmidt, S. E., Oct 2018, In : Value in Health. 21, Suppl. 3, p. S250

Research output: Contribution to journalConference abstract in journalResearchpeer-review

41 Downloads (Pure)

Definition of Fiducial Points in the Normal Seismocardiogram

Sørensen, K., Schmidt, S. E., Jensen, A. S., Søgaard, P. & Struijk, J. J., 18 Oct 2018, In : Scientific Reports. 8, 1, 11 p., 15455.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
Aortic Valve
Mitral Valve
Electrocardiography
Healthy Volunteers

Detecting the Onset of Contraction Using High Frame Rate Strain Rate Images

Andersen, M. V., Moore, C., Struijk, J. J., Arges, K., Lefevre, M., Søgaard, P., Kisslo, J., Schmidt, S. E. & Von Ramm, O. T., 6 Nov 2018, In : Circulation. 138, Suppl. 1, 15751.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Open Access
7 Downloads (Pure)

Determining the Respiratory State From a Seismocardiographic Signal: A Machine Learning Approach

Ulrich, C., Jensen, M., Hansen, R., Tavakolian, K., Khosrow-Khavar, F., Blaber, A., Sørensen, K. & Schmidt, S. E., 2018, In : Computing in Cardiology. 45, 4 p.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
File
80 Downloads (Pure)

Diagnostic performance of an acoustic-based system for coronary artery disease risk stratification

Winther, S., Nissen, L., Schmidt, S. E., Westra, J. S., Rasmussen, L. D., Knudsen, L. L., Madsen, L. H., Kirk Johansen, J., Larsen, B. S., Struijk, J. J., Frost, L., Holm, N. R., Christiansen, E. H., Botker, H. E. & Bøttcher, M., 2018, In : Heart. 104, 11, p. 928–935

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
Acoustics
Coronary Artery Disease
Heart Sounds
Routine Diagnostic Tests
Coronary Disease
2 Citations (Scopus)

Effects of rescaling bilinear interpolant on image interpolation quality

Rukundo, O. & Schmidt, S., 2 Nov 2018, Optoelectronic Imaging and Multimedia Technology V: Proceedings of SPIE. SPIE - International Society for Optical Engineering, 11 p. 1081715. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10817).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Interpolation
Pixels
Ultrasonics
Image quality
Processing

Estimation of the second heart sound split using windowed sinusoidal models

Sæderup, R. G., Hoang, P., Winther, S., Bøttcher, M., Struijk, J. J., Schmidt, S. & Østergaard, J., Jul 2018, In : Biomedical Signal Processing and Control. 44, p. 229-236 8 p.

Research output: Contribution to journalJournal articleResearchpeer-review

Heart Sounds
Acoustic waves
Mean square error
varespladib methyl
Least-Squares Analysis
2 Citations (Scopus)

Extrapolation for image interpolation

Rukundo, O. & Schmidt, S., 2 Nov 2018, Optoelectronic Imaging and Multimedia Technology V: Proceedings of SPIE. SPIE - International Society for Optical Engineering, 11 p. 108171F. (Proceedings of SPIE, the International Society for Optical Engineering, Vol. 10817).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Extrapolation
Interpolation
Pixels
Ultrasonics
5 Downloads (Pure)

Heart Sounds Obtained With Noncontact Continuous-Wave Echo Doppler

Struijk, J. J., Eiriksdóttir, D. H., Pálsdóttir, Á. A. & Schmidt, S. E., 2018, In : Computing in Cardiology. 45, 3 p.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
File

Multichannel Seismocardiography: A Novel Method for Investigating the Seismocardiogram

Munck, K., Schmidt, S. E., Sørensen, K. & Struijk, J. J., 2018.

Research output: Contribution to conference without publisher/journalConference abstract for conferenceResearchpeer-review

Risk-Reclassification of Patients With Suspected Coronary Artery Disease Using an Acoustic Score

Schmidt, S. E., Winther, S., Grønhøj, M. H., Nissen, L., Larsen, B. S., Westra, J. S., Holm, N. R., Frost, L., Bøtker, H. E., Diederichsen, A., Struijk, J. J. & Boettcher, M. H., 6 Nov 2018, In : Circulation. 138, Suppl. 1, 15761.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Open Access

Strain Rate Imaging for Visualization of Electro Mechanical Coupling

Andersen, M. V., Schmidt, S. E., Søgaard, P., Struijk, J. J., Von Ramm, O. T., Moore, C., Atwater, B., Friedman, D. J., Agnes, K., Lefevre, M. & Kisslo, J., Mar 2018.

Research output: Contribution to conference without publisher/journalPosterResearch

Open Access
2017
84 Downloads (Pure)

Association between Tpeak-Tend interval and QT prolongation: A study of sertindole and sotalol

Shakibfar, S., Struijk, J. J., Kanters, J. K., Nielsen, J., Schmidt, S. & Graff, C., 2017, In : Pharmacology, Drug Development & Therapeutics. 1, 2, p. 1-6

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File

Cardiovascular and cardiorespiratory fitness determination

Schmidt, S., Sørensen, K., Søgaard, P. & Struijk, J. J., 2017, Patent No. WO/2017/216375, 21 Dec 2017

Research output: PatentResearch

Open Access
1 Citation (Scopus)
43 Downloads (Pure)

Challenges in using seismocardiography for blood pressure monitoring

Sørensen, K., Verma, A. K., Blaber, A., Zanetti, J., Schmidt, S., Struijk, J. J. & Tavakolian, K., 2017, In : Computing in Cardiology. 44, 4 p.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
File

Coronary artery disease can be detected by an advanced sound analysis from the coronary circulation

Winther, S., Nissen, L., Westra, J., Johansen, J. K., Holm, N. H., Bottcher, M., Schmidt, S. E., Dupont, L., Larsen, B. S., Frost, L. & Botker, H. E., 2017, In : European Heart Journal. 38, Suppl. 1, p. 189-190 P862.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

1 Citation (Scopus)
33 Downloads (Pure)

Correlations of first and second heart sounds with age, sex, and body mass index

Larsen, B. S., Winther, S., Bøttcher, M., Nissen, L., Struijk, J. J. & Schmidt, S., 2017, In : Computing in Cardiology. 44, 4 p.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
File

High speed clinical strain measurements

Andersen, M., Moore, C., Ages, K., Lefevre, M., Schmidt, S., Kisslo, J. & Von Ramm, O. T., 31 Oct 2017, IEEE International Ultrasonics Symposium, IUS 2017, 6-9 September 2017, Washington, DC, USA. IEEE, 8091915

Research output: Contribution to book/anthology/report/conference proceedingConference abstract in proceedingResearchpeer-review

strain measurement
high speed
cardiology
playbacks
linear arrays
1 Citation (Scopus)

Minimal T-wave representation and its use in the assessment of drug arrhythmogenicity

Shakibfar, S., Graff, C., Kanters, J. K., Nielsen, J., Schmidt, S. & Struijk, J. J., 2017, In : Annals of Noninvasive Electrocardiology. 22, 3, 6 p., e12413.

Research output: Contribution to journalJournal articleResearchpeer-review

Sotalol
Drug-Induced Abnormalities
Discriminant Analysis
Pharmaceutical Preparations
Biomarkers

Quantitative seismocardiography

Schmidt, S., Samuelsen, P., Søgaard, P. & Struijk, J. J., 2017, IPC No. A61B5/11, Patent No. WO/2017/216374, 21 Dec 2017, Priority date 16 Jun 2016, Priority No. 16174743

Research output: PatentResearch

Open Access
7 Citations (Scopus)
171 Downloads (Pure)

Recent advances in heart sound analysis

Clifford, G. D., Liu, C., Moody, B. E., Roig, J. M., Schmidt, S. E., Li, Q., Silva, I. & Mark, R. G., 2017, In : Physiological Measurement. 38, p. E10-E25

Research output: Contribution to journalReview articleResearchpeer-review

Open Access
File
Heart Sounds
Acoustic waves
Research Personnel
Databases
Sound recording

Risk stratification of patients suspected of coronary artery disease using an acoustic detection algorithm

Winther, S., Nissen, L., Schmidt, S., Westra, J., Dupont, L., Kirk, J., Larsen, B. S., Frost, L., Holm, N., Botker, H. & Boettcher, M., 2017, In : Journal of the American College of Cardiology. 69, 11, Suppl., p. 80

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Seismocardiographic correlations to age, gender and BMI

Sørensen, K., Jensen, A. S., Hansen, J., Søgaard, P., Struijk, J. J. & Schmidt, S., 2017, p. Paper ThAT5.4.

Research output: Contribution to conference without publisher/journalConference abstract for conferenceResearchpeer-review

Open Access
1 Citation (Scopus)

Separation and characterization of maternal cardiac and vascular sounds in the third trimester of pregnancy

Riknagel, D., Zimmermann, H., Farlie, R., Hammershøi, D., Schmidt, S., Hedegaard, M., Humaidan, P. & Struijk, J. J., 2017, In : International Journal of Gynecology & Obstetrics. 137, 3, p. 253-259

Research output: Contribution to journalJournal articleResearchpeer-review

Systems and methods for estimating cardiac strain and displacement using ultrasound

von Ramm, O., Kisslo, J., Moore, C., Andersen, M. V., Schmidt, S., Søgaard, P. & Østergaard, L. R., 2017, Patent No. WO/2017/223563, 28 Dec 2017

Research output: PatentResearch

Open Access
2016

An improved algorithm for coronary bypass anastomosis segmentation in epicardial ultrasound sequences

Jørgensen, A. S., Schmidt, S. E., Staalsen, N-H. & Østergaard, L. R., 2016, In : Ultrasound in Medicine & Biology. 42, 12, p. 3010-3021

Research output: Contribution to journalJournal articleResearchpeer-review

bypasses
vessels
Coronary Artery Bypass
Quality Control
Swine
115 Citations (Scopus)

An open access database for the evaluation of heart sound algorithms

Liu, C., Springer, D., Li, Q., Moody, B., Juan, R. A., Chorro, F. J., Castells, F., Roig, J. M., Silva, I., Johnson, A. E. W., Syed, Z., Schmidt, S. E., Papadaniil, C. D., Hadjileontiadis, L., Naseri, H., Moukadem, A., Dieterlen, A., Brandt, C., Tang, H., Samieinasab, M. & 4 othersSamieinasab, M. R., Sameni, R., Mark, R. G. & Clifford, G. D., 2016, In : Physiological Measurement. 37, 12, p. 2181-2213

Research output: Contribution to journalJournal articleResearchpeer-review

Heart Sounds
Acoustic waves
Databases
Sound recording
Cardiology

Automatic segmentation of mitral leaflet movement in Doppler Tissue M-Mode ultrasound

Sørensen, K., Schmidt, S. E., Sørensen, P. L., Korsager, A. S., Melgaard, J., Søgaard, P. & Struijk, J. J., 2016, In : Computing in Cardiology. 43, 4 p., 40-459.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
1 Citation (Scopus)

Body surface mapping of the mechanical cardiac activity

Munck, K., Hansen, B. D., Jacobsen, N., Pilgaard, L. P., Schmidt, S. E., Sørensen, K. & Struijk, J. J., 2016, In : Computing in Cardiology. 43, p. 661-664 193-348.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
8 Citations (Scopus)
141 Downloads (Pure)

Danish study of Non-Invasive testing in Coronary Artery Disease (Dan-NICAD): study protocol for a randomised controlled trial

Nissen, L., Winther, S., Isaksen, C., Ejlersen, J. A., Brix, L., Urbonaviciene, G., Frost, L., Madsen, L. H., Knudsen, L. L., Schmidt, S. E., Holm, N. R., Maeng, M., Nyegaard, M., Bøtker, H. E. & Bøttcher, M., 2016, In : Trials. 17, 11 p., 262.

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
Coronary Artery Disease
Randomized Controlled Trials
Coronary Angiography
Myocardial Perfusion Imaging
Perfusion Imaging
6 Citations (Scopus)
140 Downloads (Pure)

Diagnosing coronary artery disease by sound analysis from coronary stenosis induced turbulent blood flow: diagnostic performance in patients with stable angina pectoris

Winther, S., Schmidt, S. E., Holm, N. R., Toft, E., Struijk, J. J., Bøtker, H. E. & Bøttcher, M., 2016, In : International Journal of Cardiovascular Imaging. 32, 2, p. 235-245

Research output: Contribution to journalJournal articleResearchpeer-review

Open Access
File
Stable Angina
Coronary Stenosis
Coronary Artery Disease
Diamond
Acoustics
2 Citations (Scopus)

Digital auscultation of the uterine artery: a measure of uteroplacental perfusion

Riknagel, D., Dinesen, B. I., Zimmermann, H., Farlie, R., Schmidt, S., Toft, E. & Struijk, J. J., 2016, In : Physiological Measurement. 37, 7, p. 1163-1171

Research output: Contribution to journalJournal articleResearchpeer-review

Effect of sample rate on saECG spectrum

Melgaard, J., Graff, C., Sørensen, P. L., Sørensen, K., Schmidt, S. & Struijk, J. J., 2016, In : Computing in Cardiology. 43, p. 1061-1063 306-499.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
1 Citation (Scopus)

Feature tracking algorithm for circumferential strain using high frame rate echocardiography

Andersen, M. V., Moore, C., Schmidt, S. E., Søgaard, P., Struijk, J. J., Kisslo, J. & von Ramm, O. T., 2016, In : Computing in Cardiology. 43, p. 885-888 257-427.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access

Heart-valve sounds obtained with a laser Doppler vibrometer

Struijk, J. J., Munck, K., Hansen, B. D., Jacobsen, N., Pilgaard, L. P., Sørensen, K. & Schmidt, S. E., 2016, In : Computing in Cardiology. 43, p. 197-199 59-456.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
5 Citations (Scopus)

High-frame-rate deformation imaging in two dimensions using continuous speckle-feature tracking

Andersen, M. V., Moore, C., Arges, K., Søgaard, P., Østergaard, L. R., Schmidt, S. E., Kisslo, J. & Von Ramm, O. T., 2016, In : Ultrasound in Medicine & Biology. 42, 11, p. 2606-2615

Research output: Contribution to journalJournal articleResearchpeer-review

Heart Ventricles
curves
chambers
sampling
cycles

Indication of risk for coronary artery disease

Schmidt, S. & Struijk, J. J., 2016, IPC No. A61B 7/02 (2006.01), A61B 7/04 (2006.01), A61B 5/00 (2006.01), A61B 5/0456 (2006.01), Patent No. WO/2016/162503, 13 Oct 2016, Priority date 8 Apr 2016, Priority No. PCT/EP2016/057798

Research output: PatentResearch

Open Access

Temporal alignment of asynchronously sampled biomedical signals

Schmidt, S. E., Emerek, K. J. G., Jensen, A. S., Graff, C., Melgaard, J., Søgaard, P., Sørensen, K. & Struijk, J. J., 2016, In : Computing in Cardiology. 43, 4 p., 14-311.

Research output: Contribution to journalConference article in JournalResearchpeer-review

Open Access
2015

Acoustic and ultrasonografic measurements in newly performed hemodialysis arteriovenous fistulas

Meyer-Hofmann, H., Schmidt, S., Christensen, J. H. & Pedersen, B. B., 2015, In : ASAIO Journal. 61, ASAIO Conference Abstracts, p. 112 1 p., 261.

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Acoustic and Ultrasonografic Measurements in Newly Performed Hemodialysis Arteriovenous Fistulas

Meyer-Hofmann, H., Schmidt, S., Pedersen, B. B. & Christensen, J. H., Jun 2015.

Research output: Contribution to conference without publisher/journalPosterResearchpeer-review

Open Access
25 Citations (Scopus)

Acoustic features for the identification of coronary artery disease

Schmidt, S., Holst-Hansen, C., Hansen, J., Toft, E. & Struijk, J., 2015, In : I E E E Transactions on Biomedical Engineering. 62, 11, p. 2611-2619 7105874.

Research output: Contribution to journalJournal articleResearchpeer-review

Acoustics
Acoustic waves
Digital signal processing
Frequency bands
Costs
3 Citations (Scopus)

Analysis of the electromechanical activity of the heart from synchronized ECG and PCG signals of subjects under stress

Castro, A., Moukadem, A., Schmidt, S., Dieterlen, A. & Coimbra, M. T., 2015, Proceedings of the International Conference on Bio-inspired Systems and Signal Processing, BIOSIGNALS 2015, BIOSTEC, 12-15 January 2015, Lisbon, Portugal. SCITEPRESS Digital Library, p. 49-56

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Automatic coronary artery bypass anastomosis segmentation in epicardial ultrasound

Jørgensen, A. S., Schmidt, S., Staalsen, N-H. & Østergaard, L. R., 2015, In : International Journal of Computer Assisted Radiology and Surgery. 10, Suppl. 1, p. S18-S19

Research output: Contribution to journalConference abstract in journalResearchpeer-review