It is well established that hepatic resection improves the long-term prognosis of many patients with liver metastases. However, incomplete resection does not prolong survival, so knowledge of the exact extent of intra-hepatic disease is crucially important in determining patient management and outcome. MR imaging is well recognised as one of the most sensitive methods for detecting metastases. ...

A detailed study of the magnetic resonance (MR) appearance of the cervical nerves and neural foramina is presented. Using a "butterfly" local coil and a 1.5-T GE Signa MR system, the authors obtained 3-mm-thick axial, parasagittal, and 45 degrees oblique MR images of the cervical neural foramina in four normal volunteers. For the oblique images, subjects were rotated 45 degrees toward the right...

BACKGROUND AND PURPOSE Endovascular treatment of broad-neck intracranial aneurysms with detachable coils requires special techniques. Placement of a stent over the aneurysm neck and secondary coil embolization prevents coil migration and allows attenuated packing of the coils. However, access for the stent-delivery system can be technically limited in tortuous anatomy. We present six cases of b...

Background We have begun to perform routine and research MRI right heart catheterization in adults and research MRI catheterization in children. We report our technologist workflow. Methods Scanner preparation: The scanner façade and bore are covered with adhesive clear sterile drapes and surface coils enveloped in sterile plastic bags. A MR catheterization pack contains only non-ferromagnetic ...

A four-channel phased array consisting of one surface coil, two endorectal coils, and one flexible endourethral loop coil was designed for MRI of the canine prostate. The endorectal coils provide high signal in the posterior region of the prostate, while the endourethral and surface coils are sensitive to the central and anterior regions of the prostate. Gel phantom experiments indicate that th...

Introduction Three-dimensional microcoils are used in medical technology for high-resolution magnetic resonance analysis at the micro level. The coil sensitivity, and therefore the desired signal, is maximized when the size of the coil matches that of the sample [1]. Micro solenoids show exceptional performance compared to planar coils and due to their 3-D shape, the B1 field is stronger and mo...

OBJECTIVE To optimize the MR imaging protocol for coronary arterial wall depiction in vitro and characterize the coronary atherosclerotic plaques. MATERIALS AND METHODS MRI examination was prospectively performed in ten porcine hearts in order to optimize the MR imaging protocol. Various surface coils were used for coronary arterial wall imaging with the same parameters. Then, the image param...

Various types of intravascular and other types of coils, stents, and filters have been evaluated for safety with MR systems. Several of these demonstrated magnetic field interactions in association with scanners. Fortunately, the devices that exhibit positive magnetic field interactions typically become incorporated securely into the vessel wall primarily due to tissue ingrowth within approxima...

PURPOSE: MRI is becoming a useful imaging tool for the diagnosis and treatment atherosclerotic coronary arteries. To date, there are no reports on intracoronary MRI using a clinical 3.0T MRI scanner, which requires the placement of a small sized (usually 0.014-inch in diameter) endovascular MR coil into the coronary arteries. In this study, we attempted to confirm, ex vivo, the possibility of g...