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Danvers, MA, United States

Carlesimo G.A.,NeuroLogica
Journal of Neuro-Oncology | Year: 2012

In patients with cerebral tumors, deficits in declarative episodic memory typically result from damage to structures of the Papez circuit. These deficits can arise directly from the action of the tumor mass or indirectly from the surgical intervention. Memory deficits are also frequently seen in patients who show no direct involvement of the Papez circuit. In these patients, the memory impairment probably results from disruption of frontal lobe functioning (caused by localization of the tumor at this level or disconnection from subcortical afferents). Here, I review the neuropsychological tools used to differentiate amnesic syndromes resulting from lack of consolidation of newmemory traces (as a consequence of damage to the Papez circuit) from amnesias resulting from reduced efficiency of elaborative encoding and/or strategic retrieval processes (as a consequence of frontal lobe damage). The clinical and rehabilitative implications of this distinction are briefly discussed. © Springer Science+Business Media, LLC. 2012.

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A method for providing CT fluoroscopy of an internal procedure site during a medical procedure so as to visualize patient anatomy and a high-contrast medical element during the procedure without subjecting the patient to unacceptable quantities of X-ray radiation, comprising: (1) taking a standard intensity CT scan of the internal procedure site; (2) taking a reduced intensity CT scan of the procedure site while the high-contrast medical element is inserted into the procedure site; (3) extracting the high-contrast medical element portion of the reduced intensity CT scan from the reduced intensity CT scan; (4) merging the high-contrast medical element portion of the reduced intensity CT scan extracted in Step 3 with the standard intensity CT scan of the procedure site taken in Step 1 so as to provide a composite CT scan; (5) displaying the composite CT scan; and (6) returning to either Step 1 or Step 2.

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