Diagnostic accuracy and estimation of the severity of valvular regurgitation from the signal void on cine magnetic resonance images

Cardiovascular MR Imaging after Surgical Correction of Tetralogy of Fallot: Approach Based on Understanding of Surgical Procedures

“…Cardiovascular MR imaging is the most accurate and reproducible method for quantification of pulmonary regurgitation (33,34) To calculate this value, VEC MR imaging is performed in a plane perpendicular to the direction of blood flow approximately 1 cm above the pulmonary valve (Fig 22). Measurement of forward and backward flow across the pulmonary valve allows calculation of the regurgitant fraction, which determines the severity of valvular incompetence.…”

Quantification of mitral regurgitation with MR phase‐velocity mapping using a control volume method

“…Angio graphy (1) has been the standard clinical technique, but it is invasive, only semiquantitative, and involves radia tion exposure. A variety of echocardiographic and MRI techniques (2)(3)(4)(5)(6)(7)(8)(9)(10) have been studied recently to assess mitral regurgitation. They focused on the jet side of the regurgitant valve in an attempt to correlate the geomet rical parameters of the regurgitant jet in the left atrium with the severity of the disease.…”

Blood flow measurements with magnetic resonance phase velocity mapping

“…Angiography [22] has been traditionally used to diagnose the disease, but it is invasive, only semi-quantitative, and in volves radiation exposure. A variety of echocar diographic and MR techniques [23][24][25][26][27][28][29] have also been evaluated to assess regurgitation focusing on the jet side of the regurgitant valve. Unfortu nately, these techniques are accompanied by tech nical limitations.…”