The 3d-probe was placed at the apex of the left-ventricle of an open-chest dog using a small ultrasound gelpad (Aquaflex) as a standoff as shown in figure 1. Each acquisition consisted of 13-17 frames per cardiac cycle depending on the heart rate. The angular slice spacing was 5 ...
Villalba-Orero M, López-Olañeta MM, González-López E et al (2017) Lung ultrasound as a translational approach for non-invasive assessment of heart failure with reduced or preserved ejection fraction in mice. Cardiovasc Res 113:1113–1123. https://doi.org/10.1093/cvr/cvx090 Article CAS ...
Automatic detection of the QRS complex on ECG is used on most cardiac ultrasound scanners to separate recorded ultrasound data into cardiac cycles for continuous playback and storage. On small hand-held scanners it is unpractical to connect ECG cables. We aim to do automatic cardiac cycle separati...
Transthoracic M-mode echocardiographic recordings used the Vevo®3100 micro-ultrasound imaging system (FUJIFLIM VisualSonics Inc., Canada) following manufacturer’s instructions. Three measurements taken at end-systole (s) and end-diastole (d) were averaged to calculate corresponding values of ...
Accurate cardiac motion estimation from medical images such as ultrasound is important for clinical evaluation. We present a novel regularisation layer for cardiac motion estimation that will be applied after image registration and demonstrate its effect
Echo uses a typical ultrasound machine connected to a probe of a different shape. While the heart structures can be easily visible in us, a physician needs to use the Doppler effect if they want to visualize the blood flow and measure its velocity. Echo Doppler function allows us to measure...
Our proposal is a novel registration approach that aligns intraoperative 2D ultrasound with preoperative 3D-CT information. This approach takes advantage of the anatomical constraints imposed at the transesophageal HIFU probe to simplify the registration process. Our proposed method has been evaluated on ...
K. Martin et al., “Measurement of the Speed of Sound in Ethanol/Water Mixtures,” Ultrasound in Medicine & Biology., vol. 27, No. 2, 2001, pp. 289-291. T. J. Moir, “Discrete-time Variance Tracking with Application to Speech Processing,” Res. Lett. Inf. Math. Sci., vol. 2...
diagram of the data acquisition set up for cardiac ultrasound examinations. The echocardiograph numerical data and the electro-mechanical signals were later manually synchronized during post-processing steps. We stored the corresponding ECG and MEMS data for each captured ultrasound image for all the ...
[8]. However, TEE necessitates the insertion of an endoscopic ultrasound probe into the patient’s esophagus, making it an invasive and uncomfortable procedure that may potentially require sedation [9]. Transcranial Doppler (TCD) is another method that uses a low-frequency probe to assess ...