OBJECTIVE The objective of this study was to find the most appropriate, accurate, and convenient muscle parameter that can be used as a substitute for volume in monitoring the effectiveness of therapy of patients with Graves' ophthalmopathy. SUBJECTS AND METHODS The four rectus muscles in 110 orbits (35 patients and 20 control subjects) were evaluated with MR imaging. The diameter at the larg...

Participants/Methods: This study was comprised of 36 boys with undescended testes. The patients underwent preoperative MR imaging examinations with a 1.5-T system. Sequences included axial and coronal fat-suppressed turbo spin-echo T2-weighted, axial and coronal T1-weighted, and axial single-shot spin-echo echo-planar diffusion-weighted imaging (DWI) sequence performed with b-values of 50, 400,...

BACKGROUND AND PURPOSE There are few studies comparing the capacity of lesion detection of conventional MR imaging in neurocysticercosis (NCC). This study was designed to clarify its role in the evaluation of this disease, focusing on the total number of lesions identified and the characterization of the scolex. MATERIALS AND METHODS MR images from 115 patients were prospectively collected du...

MR was performed on six patients clinically diagnosed as having neurofibromatosis. Owing to its multiplanar capability, MR greatly helped determine the extent of visual pathway disease. We attempted to find specific optimal pulse sequences for evaluating the prechiasmatic, chiasmatic, and retrochiasmatic visual system at 0.35 T. Using spin-echo techniques, we evaluated a T1-weighted sequence (T...

PURPOSE To investigate the MR findings in patients who have had osteoplastic frontal sinus flaps placed for inflammatory sinonasal disease. METHODS The MR images of 13 patients who had improvement of symptoms after osteoplastic frontal sinus flap placement with fat autograft were prospectively evaluated for the presence of high intensity on T2-weighted scans, contrast enhancement, and replace...

BACKGROUND Subarachnoid hemorrhage (SAH) is one of the most devastating cerebrovascular disorders. We report on the diagnostic value of three-dimensional (3-D) maximum intensity projection (MIP) reconstruction of T2*-weighted magnetic resonance images (MRI), processed using graphical user interface-based software, to aid in the accurate grading of endovascular-perforation-induced SAH in a mouse...

BACKGROUND AND PURPOSE Although diffusion-weighted imaging (DWI) is a very sensitive technique for the detection of small ischemic lesions in the human brain, in particular in the brainstem it may fail to demonstrate acute ischemic infarction. In this study, we sought to evaluate the value of additional thin-section coronal DWI for the detection of brainstem infarction. METHODS In 155 consecu...

INTRODUCTION: Up to now, Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction (PROPELLER) or BLADE imaging has been applied to reduce motion artifacts mainly in T2-weighted imaging. Using an inversion pulse at the beginning of the sequence results in T1-weighted contrast – this technique has been evaluated for T1-weighted imaging in the brain after application of contras...

OBJECTIVE To assess the diagnostic value of the fast FLAIR sequence in patients with epilepsy. METHODS One hundred and twenty eight patients with epilepsy and 10 control subjects were scanned with the fast FLAIR sequence with 5 mm slices, a coronal gradient echo (GRE) T1 weighted sequence with 1.5 mm slices and spin echo (SE) or fast spin echo (FSE) proton density and T2 weighted sequences wi...

PURPOSE To show that postgadolinium three-dimensional time-of-flight MR angiography shows abnormal intradural vessels associated with spinal dural arteriovenous fistula better than routine MR imaging and provides screening information useful for subsequent diagnostic conventional angiography and/or posttreatment evaluation. METHODS Precontrast and postcontrast MR imaging and MR angiograms, as...