O G Inorganic Nanoparticles for MRI Contrast Agents R E S By Hyon Bin Na, In Chan Song, and Taeghwan Hyeon* S R E P O R T Various inorganic nanoparticles have been used as magnetic resonance imaging (MRI) contrast agents due to their unique properties, such as large surface area and efficient contrasting effect. Since the first use of superparamagnetic iron oxide (SPIO) as a liver contrast agen...

PURPOSE To determine whether contrast-enhanced MRI including subtraction sequences can predict the treatment response of melanoma liver metastasis. RESULTS High precontrast T1 signal intensity (SI) of melanoma lesions obscured detection of enhancement after contrast injection. It was impossible to determine whether or not enhancement occurred in the majority of lesions (85.4%, n = 35/41) with...

Most patients with liver cirrhosis must undergo a series of clinical examinations, including ultrasound imaging, liver biopsy, and blood tests. However, the quantification of liver cirrhosis by extracting significant features from a T2-weighted magnetic resonance image (MRI) provides useful diagnostic information in clinical tests. Sixty-two subjects were randomly selected to participate in thi...

Background: To assess MRI in diagnosing endometriotic lesions, emphasizing T2*weighted imaging efficacy. Materials and Methods: This prospective study of 48 females (22-38 years, average 29.6) clinically suspected of endometriosis from September 2009 to April 2012. MRI was performed with a 1.5 T imager (Siemens) with a body array coil. T1, T2 and T2* weighted (2D-FLASH) sequences were obtained ...

Purpose: The purpose of this study is to compare the signal characteristics liver lesions and difference between interpreters in magnetic resonance imaging (MRI) T2-PROPELLER, T2-FIESTA, T2-SSFSE sequences.
 Materials Methods: This was performed with upper abdominal MR images examined January 2014-July 2016 at Adana Numune Training Research Hospital were included study. Liver a diameter 5 ...

purpose t1wi (t1 weighted image) was acquired in order to grade bone fusion following the studies by fifa (federation internationale de football associations). research using images other than t1wi has not been reported. the aim of this study is to evaluate the grade of epiphyseal fusion by t2* weighted images (t2*wi) and to investigate new findings on t2*wi as compared with t1wi. methods a tot...

OBJECTIVE The aim of this study was to determine if changes in hepatic iron content in patients with hemochromatosis pre- and post-venesection could be detected by changes in liver signal intensity with MRI. MATERIALS AND METHODS The study was performed with institutional ethics approval and with informed consent. Gradient echo images were performed on 20 patients with hemochromatosis pre- an...

Magnetic resonance imaging (MRI) is a well-established imaging modality to evaluate increased iron deposition in the liver. Both standard liver imaging series with in-phase and out-of-phase T1-weighted sequences for visual detection, as well as advanced T2- and T2*-weighted measurements may be used for mapping the iron concentration. In this article, we describe different forms of liver iron ac...

Only limited data are available regarding myocardial iron overload in adult patients with transfusion dependent acquired anemias. To address this topic using MRI T2* we studied 27 consecutive chronic transfusion dependent patients with acquired anemias: (22 myelodysplastic syndrome, 5 primary myelofibrosis). Cardiac MRI T2* values obtained ranged from 5.6 to 58.7 (median value 39.8) millisecond...

INTRODUCTION Iron overload is a common occurrence in children with thalassaemia major and sickle cell disease (due to frequent blood transfusions) or hereditary hemochromatosis. In this patient group, a non-invasive means to quantify iron is extremely attractive compared to conventional liver biopsy for determining total body iron. Recent advances in MRI have enabled non-invasive iron quantific...