MRI-Compatible Injection System for Magnetic Microparticle Embolization

Conclusion and Significance: This system has the capability to operate within the strong magnetic field of a clinical 3-T MRI, to form proper particle aggregates and to automatically inject these aggregates into the MRI bore. Moreover, the versatility of the proposed injector renders it suitable for selective injections of MDEBs during MR-guided embolization procedures.
Source: IEEE Transactions on Biomedical Engineering - Category: Biomedical Engineering Source Type: research

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ConclusionBased on the results of the meta-analysis, MRI may be the first choice for the differential diagnosis of benign and malignant salivary gland tumors for its relatively high diagnostic value. PET/CT tends to have greater accuracy than CT. Ultrasonography and RTE may help achieve better diagnostic outcomes if they are used in conjunction.
Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology - Category: ENT & OMF Source Type: research
HepaFat-Scan is a magnetic resonance imaging-based method for quantification of hepatic steatosis by volumetric liver fat fraction (VLFF) measurement. We aimed to validate VLFF and to compare it with controlled attenuation parameter (CAP) for determination of hepatic steatosis grade in patients with NAFLD, using histopathology and stereologic analyses of biopsies as the reference standard.
Source: Clinical Gastroenterology and Hepatology - Category: Gastroenterology Authors: Source Type: research
by Etienne Vachon-Presseau, Sara E. Berger, Taha B. Abdullah, James W. Griffith, Thomas J. Schnitzer, A. Vania Apkarian Psychological and personality factors, socioeconomic status, and brain properties all contribute to chronic pain but have essentially been studied independently. Here, we administered a broad battery of questionnaires to patients with chronic back pain (CBP) and collected repeated sessions of rest ing-state functional magnetic resonance imaging (fMRI) brain scans. Clustering and network analyses applied on the questionnaire data revealed four orthogonal dimensions accounting for 56% of the variance and d...
Source: PLoS Biology: Archived Table of Contents - Category: Biology Authors: Source Type: research
This study is aimed to investigate whether acupuncture at GV20 could modulate the abnormal AN of patients with the first-episode, drug-na ïve MDD by using rs-fMRI combined with functional connectivity (FC) method. Thirty MDD patient underwent 6-min rs-fMRI scans respectively before and after 20-min electro-acupuncture stimulate(EAS) at GV20. Twenty-nine healthy subjects underwent only a 6-min rs-fMRI scan. Based on the amygdala as th e seed region, FC method was adopted to examine abnormal AN in patients by comparing with healthy subjects and to evaluate the influence of EAS on intrinsic connectivity within the AN in ...
Source: Brain Imaging and Behavior - Category: Neurology Source Type: research
ConclusionsOur collective results demonstrate the potential benefits of PSF-EPI for concurrent TMS-fMRI when coil-related artifacts are a concern. The ability to collect high quality resting state fMRI data in the same session as the concurrent TMS-fMRI experiment offers a unique opportunity to interrogate network architecture in the human brain.
Source: Journal of Neuroscience Methods - Category: Neuroscience Source Type: research
Technical advances in imaging are well demonstrated by MRI (Magnetic Resonance Imaging) and PET (Positron Emission Tomography). Excellent anatomical detail and a lack of ionising radiation make MRI the standar...
Source: Cancer Imaging - Category: Radiology Authors: Tags: Review Source Type: research
AbstractBackgroundPET (positron emission tomography) biokinetic modelling relies on accurate quantitative data. One of the main corrections required in PET imaging to obtain high quantitative accuracy is tissue attenuation correction (AC). Incorrect non-uniform PET-AC may result in local bias in the emission images, and thus in relative activity distributions and time activity curves for different regions. MRI (magnetic resonance imaging)-based AC is an active area of research in PET/MRI neuroimaging, where several groups developed in the last few years different methods to calculate accurate attenuation ( μ-)maps. Some...
Source: EJNMMI Research - Category: Radiology Source Type: research
Meniscus allograft transplantation is a valuable surgical option for post-meniscectomy syndrome. For best results, the selected allograft should be as similar as possible to the original meniscus. Three-dimensional meniscus sizing could be a new approach to improve the accuracy of meniscus matching. The contralateral anatomy might therefore be a suitable reconstruction template. The purpose of this study was to compare the three-dimensional shape of the right and left menisci by bi-planar segmentation of magnetic resonance imaging (MRI) scans.
Source: The Knee - Category: Orthopaedics Authors: Source Type: research
Publication date: Available online 16 August 2019Source: Diagnostic and Interventional ImagingAuthor(s): S. Sun, P.A. Bonaffini, S. Nougaret, L. Fournier, A. Dohan, J. Chong, J. Smith, H. Addley, C. ReinholdAbstractUterine leiomyomas, the most frequent benign myomatous tumors of the uterus, often cannot be distinguished from malignant uterine leiomyosarcomas using clinical criteria. Furthermore, imaging differentiation between both entities is frequently challenging due to their potential overlapping features. Because a suspected leiomyoma is often managed conservatively or with minimally invasive treatments, the misdiagno...
Source: Diagnostic and Interventional Imaging - Category: Radiology Source Type: research
AbstractFat suppression is a technique used to suppress the signals from adipose tissues, during clinical evaluation of the tissues near the fat –tissue boundary. However, in cases where the scan area has a complicated shape, the effect of fat suppression may demonstrate poor uniformity, resulting in diagnosis-related difficulties. To improve the uniformity of fat suppression, phantom studies are more suitable than volunteer studies. In th is study, we evaluated the reliability of the region of interest (ROI) dependency using an unevenness phantom, to develop a method to assess the uniformity of fat suppression while...
Source: Radiological Physics and Technology - Category: Physics Source Type: research
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