Jongmin Lee

A novel dynamic chest radiography technique can be used to easily and rapidly detect severe pulmonary regurgitation, demonstrating excellent diagnostic performance with phase-contrast MRI as the reference standard.

Hwang SH, et al. Cardiovasc Imaging Asia. 2026 Jul;10(3):45-59. https://doi.org/10.22468/cvia.2026.00052

Identifying arterial stenosis is crucial for preventing ischemic disease. Hemodynamic evaluation is helpful for detecting abnormalities before symptom onset. Additionally, hemodynamic assessment enables localization of the specific lesions responsible for ischemic events. Accordingly current clinical guidelines recommend the use of validated imaging modalities, including MRI, Doppler ultrasonography, and angiography. These techniques provide both qualitative flow visualization and quantitative analysis. Key quantitative markers include velocity, flow rate, impedance, and pressure gradients. These parameters enable objective comparison of flow patterns and facilitate sensitive monitoring of disease progression. This review outlines clinically applicable hemodynamic imaging techniques and details their methodologies and diagnostic performance.

Lee J. Korean J Radiol. 2026 Jan;27(1):11-13. https://doi.org/10.3348/kjr.2025.1736

Lee J. Cardiovasc Imaging Asia. 2025 Jul;9(3):27-27. https://doi.org/10.22468/cvia.2025.00059

The cardiovascular system operates through complex hemodynamic processes involving pulsatile blood flow, varying viscosity, and the branching architecture of vessels. Interactions between blood flow and the vascular wall, which are characterized by shear and normal stress, along with wall stiffness, are crucial for maintaining vascular health. Doppler ultrasonography is a highly valuable noninvasive tool for assessing these hemodynamic parameters, enabling the measurement of key indices such as blood flow velocity, flow patterns, wall shear stress, and wall stiffness. This paper emphasizes the clinical significance of these indices and methods of measuring them using Doppler ultrasonography while addressing potential challenges. Accurate interpretation of these measurements is vital for reliable cardiovascular diagnostics and effective clinical decision-making.