• Quantitative cardiac function assessment using ultrasound emerged as a core paradigm: measuring LV stroke volume and volumes, assessing regurgitation and stenosis to quantify hemodynamics and dysfunction [3], [4], [7], [8], [14].

• Expansion of ultrasound as a clinical imaging modality in cardiology and vascular imaging, enabling Doppler assessments, mitral/tricuspid valve evaluation, detection of pericardial effusion, and arteriography to visualize vascular structures and flow [1], [8], [9], [11], [13].

• Ultrasound-based diagnostic imaging extends beyond the heart to the abdomen and kidneys, differentiating masses and characterizing tissue: pulsed ultrasound for abdominal masses, nephrosonography for renal masses, upper-abdomen scanning, and grey-scale echography for intrahepatic disease [6], [12], [15], [19].

• Ultrasonic reflection/echo-based imaging and tomography emerged as a core methodological approach for heart and vascular structures, including ultrasono-tomography of the heart/great vessels and reflected ultrasound in valve disease and tricuspid stenosis, illustrating echo-based diagnostic modalities [1], [5], [13], [17].

• Foundational biophysical ultrasound research addressed interactions with living systems, identifying non-thermal effects and demonstrating focal destructive lesion production as a basis for later therapeutic applications [10], [20].