Quantitative Magnetic Resonance Imaging Analysis of the Lacrimal Gland in Sickle Cell Disease
ObjectivesClinical manifestations of sickle cell disease (SCD) can affect the orbit with prior reports describing changes in the lacrimal gland potentially related to chronic vaso-occlusion. The purpose of this study was to evaluate lacrimal gland volumes and quantifiable shifts in MR-relaxation times in patients with SCD. MethodsThirteen patients with SCD and 12 age-matched control subjects underwent magnetic resonance imaging (MRI) of the orbits with 1.5-T MRI. Lacrimal glands were segmented manually; and gland volumes, peak, and mean T1- and T2-relaxation times were obtained from histogram analysis. ResultsIn patients w...
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

Influence of Smoking History on Imaging Characteristics Among Patients With Human Papillomavirus-Positive Oropharyngeal Cancer: A Blinded Matched-Pair Analysis
ConclusionsAmong the patients with HPV-positive oropharyngeal cancer, no imaging characteristics were identified to correlate with the critical prognostic feature smoking status. Cystic and necrotic nodal metastases, as described previously, were more common among the patients with HPV-positive than those with HPV-negative oropharyngeal cancers. Although cystic nodal metastases were more common among the never/light smokers with HPV-positive oropharyngeal cancer than among smokers with HPV-positive oropharyngeal cancer, however, because these results did not reach statistical significance, we concluded that the imaging res...
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

CT Findings in Temporal Bone Osteoradionecrosis
ConclusionMastoid effusion and external auditory canal erosions are commonly seen with TB-ORN. Clinically moderate or severe cases of TB-ORN are more likely to demonstrate enhancing soft tissue (P = 0.002), soft tissue gas (P = 0.002), and temporomandibular joint involvement (P = 0.07). (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

Minor Ossicular Anomalies in the Middle Ear: Role of Submillimeter Multislice Computed Tomography
ConclusionsSubmillimeter CT improved detectability of anomalies of the stapedial superstructure; however, it is still difficult to identify abnormalities of the footplate. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

Differences in Dynamic Susceptibility Contrast MR Perfusion Maps Generated by Different Methods Implemented in Commercial Software
PurposeThere are several potential sources of difference that can influence the reproducibility of magnetic resonance (MR) perfusion values. We aimed to investigate the reproducibility and variability of dynamic susceptibility contrast (DSC) MR imaging (MRI) parameters obtained from identical source data by using 2 commercially available software applications with different postprocessing algorithms. Methods and MaterialsWe retrospectively evaluated DSC-MRI data sets of 24 consecutive patients with glioblastoma multiforme. Perfusion data were postprocessed with 2 commercial software packages, NordicICE (NordicNeuroLab, Ber...
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

Voxel-Based Correlation Between Whole-Brain CT Perfusion With 320-Row Area Detector CT and Iodine 123 Iodoamphetamine Brain Perfusion SPECT in Patients With Cerebrovascular Disease
ObjectiveWe compared cerebral blood flow (CBF) measured using computed tomographic (CT) perfusion (CTP) and N-isopropyl-p-[(123) I]-iodoamphetamine cerebral perfusion single-photon emission computed tomography (SPECT). MethodsWe used a 320-row area detector CT and N-isopropyl-p-[(123) I]-iodoamphetamine cerebral perfusion SPECT under similar conditions in patients with chronic cerebrovascular disease. Images were automatically aligned 3-dimensionally for voxel-by-voxel comparisons. ResultsLinear positive correlations were observed between CTP-CBF including high-blood-flow areas and SPECT-CBF over the whole brain (r = 0.001–0.6, P
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

Neuroradiological Features of Papillary Glioneuronal Tumor: A Study of 8 Cases
ConclusionsThe location adjacent to lateral ventricle, isointensity on T1-weighted imaging, and low signal on DWI may be of some specificity to PGNT. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research

False-Negative Diffusion-Weighted Imaging in Acute Stroke and its Frequency in Anterior and Posterior Circulation Ischemia
ConclusionsFalse-negative DWI findings in acute stroke can be observed both in association with the posterior circulation/small lesions and the anterior circulation/large lesions. (Source: Journal of Computer Assisted Tomography)
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research