•Myocardial enhancement after agitated saline contrast study in a dog is described.•Suspect air microemboli can inadvertently be introduced into coronary vasculature.•Air are theoretic risk of echocardiography. Echocardiography the primary imaging modality for diagnosing heart disease animals and people. While color flow Doppler identify intracardiac blood direction velocity, injection (introdu...

Learning the basic concepts required to understand magnetic resonance (MR) imaging is a straightforward process. Although the individual concepts are simple, there are many concepts to learn and retain simultaneously; this situation may give the illusion that learning the physics of MR imaging is complicated. It is important for the radiologist who interprets MR images to understand the methods...

In this study, spin-echo and gradient-echo-based perfusion magnetic resonance imaging (MRI) techniques are systematically compared with respect to their application in the human brain. Six healthy subjects were evaluated with both techniques consecutively and injected twice with a gadolinium-based contrast agent. In accordance with theoretical predictions and with previous animal experiments, t...

Thirty-nine patients who had rheumatic mitral valve disease in sinus rhythm were studied to compare echocardiographic and hemodynamic characteristics between those with and without left atrial (LA) spontaneous echo contrast. Patients were divided into two groups according to the presence (group 1, n = 17) or absence (group 2, n = 22) of the echo contrast. Transthoracic echocardiography and tran...

PURPOSE To determine whether dynamic traditional spin-echo MR imaging, with the use of routine T1 parameters during contrast infusion, is superior to standard MR imaging after contrast administration for detecting microlesions of the pituitary gland. METHODS Sixty-four patients with pituitary microlesions 3 to 10 mm in diameter were examined with a dynamic traditional spin-echo technique; tha...

Objective(s): The present study aimed to evaluate the capability of synthesized and modified superparamagnetic iron oxide nanoparticles (SPIONs) as the positive contrast agent in magnetic resonance imaging (MRI) by investigating the effect of repetition time (TR) on the MRI signal intensity. Materials and Methods: SPIONs were synthesized using the co-precipitation method, and their surfac...

MRI tissue contrast is not well preserved at high field. In this work, we used a phantom with known, intrinsic contrast (3.6%) for model tissue pairs to test the effects of low angle refocusing pulses and magnetization transfer from adjacent slices on intrinsic contrast at 1.5 and 3 Tesla. Only T1-weighted spin echo sequences were tested since for such sequences the contrast loss, tissue heatin...