Journal of computer assisted tomography
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J Comput Assist Tomogr · Jan 2003
Comparative StudyDiffusion-weighted imaging for the evaluation of diffuse axonal injury in closed head injury.
The purpose of this work was to compare diffusion-weighted imaging (DWI) with conventional MRI in the detection of shearing injuries in acute closed head injuries. ⋯ DWI is valuable in closed head injury because it identifies additional shearing injuries not visible on T2/FLAIR or T2* sequences. Furthermore, DWI/ADC maps differentiate between lesions with decreased or increased diffusion. DWI is less sensitive than T2* imaging for detecting hemorrhagic lesions.
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J Comput Assist Tomogr · Jan 2003
Evaluation of hemangioma by positron emission tomography: role in a multimodality approach.
The relative utility of various preoperative diagnostic imaging modalities for the evaluation of hemangioma of the extremities, including positron emission tomography (PET) (using 18F-fluoro-2-deoxy-D-glucose [FDG] and fluorine-18 alpha-methyltyrosine [FMT]), computed tomography (CT), magnetic resonance imaging (MRI), and digital subtraction angiography (DSA), was investigated. ⋯ Although plain radiography, CT, MRI, and angiography may provide anatomic extent and be pathognomonic, FDG-PET and FMT-PET may be the most reliable among the studied imaging modalities for differentiating benign hemangiomas from other soft tissue tumors, especially malignant neoplasms.
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J Comput Assist Tomogr · Nov 2002
Case ReportsHemichorea-hemiballism in primary diabetic patients: MR correlation.
The purpose of this work was to describe the characteristic imaging findings and clinical presentations in patients with hemichorea-hemiballism (HC-HB) associated with nonketotic hyperglycemia (NKH) in primary diabetes mellitus (DM). ⋯ In patients with HC-HB with NKH in primary DM, T1-weighted MR images showed hyperintense lesions of the putamen or caudate. Early recognition of these imaging characteristics may facilitate the diagnosis of primary DM with hyperglycemia and lead to prompt and appropriate therapy.
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J Comput Assist Tomogr · Nov 2002
Case ReportsTranslocation of Broca's area to the contralateral hemisphere as the result of the growth of a left inferior frontal glioma.
We report a case of a patient with a left inferior frontal glioma in whom language functional magnetic resonance imaging (fMRI) paradigms produced activation of Broca's area on the right and Wernicke's area on the left. We propose that tumor invasion of the left frontal operculum led to cortical reorganization and interhemispheric transfer of Broca's area. This case emphasizes the importance of preoperative fMRI in assessing the location of eloquent cortices adjacent to a tumor and in guiding neurosurgical decision-making.
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J Comput Assist Tomogr · Nov 2002
Case ReportsGadolinium-enhanced multidetector CT angiography of the thoracoabdominal aorta.
A 93-year-old patient with a cardiac pacemaker and biochemical renal failure presented with back pain suspicious for dissection. We performed gadolinium-enhanced thoracoabdominal multidetector CT angiography using eight-channel multidetector CT. Uniform aortic enhancement of 140 HU was sufficient to exclude aortic dissection and defined an unruptured infrarenal abdominal aortic aneurysm.