Motion-sensitive phase contrast magnetic resonance imaging and magnetic resonance elastography are applied for the measurement of volumetric strain and tissue compressibility in human brain. Volumetric strain calculated by the divergence operator using a biphasic effective-medium model is related to dilatation and compression of fluid spaces during harmonic stimulation of the head or during int...

OBJECTIVES To clarify the prognostic value of strain and strain rate imaging in light-chain (AL) amyloidosis. BACKGROUND Myocardial strain and strain rate Doppler imaging are objective measurements that may detect regional subtle myocardial functional abnormalities in patients with amyloidosis. METHODS We prospectively examined 119 consecutive, untreated patients with biopsy-proven AL amylo...

Advanced medical imaging and visualization has a strong impact on research and clinical decision making in gastroenterology. The aim of this paper is to show how imaging and visualization can disclose structural and functional abnormalities of the gastrointestinal (GI) tract. Imaging methods such as ultrasonography, magnetic resonance imaging (MRI), endoscopy, endosonography, and elastography w...

The purpose of the current study was to compare right ventricular (RV) myocardial wall velocities (tissue Doppler imaging) and strain rate imaging (SRI) parameters with conventional echocardiographic indices evaluating RV function in chronic obstructive pulmonary disease (COPD) patients. In total, 39 patients with COPD and 22 healthy subjects were included in the current study. Seventeen patien...

Cardiac resynchronization therapy (CRT) is a proven therapy for selected patients with heart failure, it has been shown to improve symptoms and left ventricular (LV) function and prolong survival. Despite proven benefit of CRT, a significant proportion of patients fail to respond to CRT. Multiple factors contribute to the non-response such as patient selection and device implantation including ...

AIMS We evaluated the systolic and diastolic functions of both ventricles from the early neonatal period to adolescence using color tissue Doppler imaging and 2-dimensional tissue tracking echocardiography. METHODS We examined 100 healthy children (aged 1-5 days, n = 20; 1 month, n = 20; 1 year, n = 20; 6-7 years, n = 20; and 12-13 years, n = 20). Blood flow velocities in the mitral and tricu...

INTRODUCTION Which kind of ultrasound imaging technique is suitable for the assessment of the abdominal aortic stiffness are seldom reported. The purposes of this study were to explore a reliable method to evaluate the abdominal aortic stiffness in patients with hypertension among the following ultrasound imaging techniques: M-mode ultrasonography (M-mode), tissue tracking and strain rate imagi...

background pulmonary artery hypertension is the presentation of various types of cardiovascular and systematic diseases. there are different kinds of noninvasive methods to determine right ventricular function, pulmonary artery pressure, and effect of pulmonary hypertension on right ventricular function. these methods include the tissue doppler imaging (tdi) of the tricuspid annulus and the lon...

Strain and defects in crystalline materials are responsible for the distinct mechanical, electric, magnetic properties of a desired material, making their study an essential task material characterization, fabrication, design. Existing techniques visualization strain fields, such as transmission electron microscopy diffraction, destructive limited to thin slices materials. On other hand, nondes...