INTRODUCTION: In recent years, phased array coils have seen widespread adoption across a variety of MR applications. Multiple receivers can be exploited to improve SNR and/or reduce scan time through parallel imaging methods. Although the matched-filter is the theoretically optimal method for combining coils (highest SNR and no bias) [1], it requires accurate coil sensitivity maps and access to...

INTRODUCTION: Conventional gradient and shim coils provide one magnetic field term per coil. The sensitive volume of the coils is defined before the coils are designed and has to be chosen sufficiently large to cover all kinds of objects and MR applications. After the theoretical introduction of the multi-coil approach for the generation of all firstto forth-order spherical harmonic field terms...

1. Schellhas KP. MR imaging of muscles of mastication. AJNR 1989;1 0:829837 . AJR 1989;153:847-855 2. Schellhas KP, Wilkes CH, Fritts HM, Omlie MR. Heithoff KB, Jahn JA. Temporomandibular joint: diagnosis of internal derangements and postoperative changes. AJNR 1987;8: 1093-1101, AJR 1988;150:381-389 3. Harms SE, Wilk RM , Wolford LM, et al. The temporomandibular joint: magnetic resonance imagi...

BACKGROUND AND PURPOSE Endovascular treatment of intracranial aneurysms is too often associated with aneurysm recurrence due to coil compaction. High packing of coils prevents compaction. To increase the packing attenuation, we sought to evaluate the results of selective embolization of aneurysms with complex-shaped coils alone. METHODS Twenty consecutive patients with an intracranial aneurys...

Introduction We present a parallel low-cost MR receiver array for microfluidic analysis. The platform is based on a standard printed circuit board (PCB) process and a laser cut PMMA. Each PCB holds four glass capillaries. Each capillary has a solenoidal pick-up coil wrapped around it. The coil forms part of a resonant tuning and matching circuit, which is connected to a channel of the MRI spect...

PURPOSE Axium™ coils were developed to improve the durability of coil-embolized cerebral aneurysms by increasing packing density. The purpose of this prospective multicenter registry was to evaluate the safety and durability of Axium™ coils. MATERIALS AND METHODS One hundred twenty-six patients with 135 aneurysms of ≤ 15 mm in size underwent coil embolization using bare platinum coils, with A...

Introduction: MR imaging with hyperpolarized [1-C]-pyruvate has the unprecedented ability to rapidly probe cellular metabolic pathways and is a potentially valuable clinical tool, particularly for cancer imaging [1]. Detection of the conversion of hyperpolarized [1C]-pyruvate to hyperpolarized [1-C]-lactate has enabled the demonstration of elevated lactate in animal models of cancer –including ...

Simultaneous positron emission tomography and magnetic resonance imaging (PET-MR) is an innovative and promising imaging modality that is generating substantial interest in the medical imaging community, while offering many challenges and opportunities. In this study, we investigated whether MR surface coils need to be accounted for in PET attenuation correction. Furthermore, we integrated moti...