Large margin aggregation of local estimates for medical image classification.

Medical images typically exhibit complex feature space distributions due to high intra-class variation and inter-class ambiguity. Monolithic classification models are often problematic. In this study, we propose a novel Large Margin Local Estimate (LMLE) method for medical image classification.

MRI changes during water loading in patients with polydipsia and intermittent hyponatremia.

Objective: Patients with polydipsia and intermittent hyponatremia have greater ventricle-brain ratios (VBRs) than matched patients without polydipsia and intermittent hyponatremia and normal subjects. Unlike previous studies, this study controlled for the impact of water loading when examining the volume of intracranial structures.

Method: Under controlled conditions, eight male schizophrenic patients with polydipsia and intermittent hyponatremia were first assigned to either normal fluid intake or oral water loading and then the alternative condition the following day.

Posterior fossa hemorrhage after supratentorial surgery.

Purpose: To evaluate the imaging findings, possible pathogenesis, and frequency of hemorrhage near the tentorial surface of the cerebellum after supratentorial surgery.

Methods: Over a 5-year period, 13 patients with posterior fossa hemorrhage after supratentorial surgery were identified with postoperative CT studies, which were obtained in all patients after craniotomy. Four of the 13 patients also had postoperative MR examinations.

Cerebral hemiatrophy: classification on the basis of MR imaging findings of mesial temporal sclerosis and childhood febrile seizures.

Purpose: To classify cerebral hemiatrophy on the basis of childhood febrile seizures and magnetic resonance (MR) imaging findings of mesial temporal sclerosis.

Materials And Methods: Medical records and brain MR images obtained in 23 patients aged 1-64 years with cerebral hemiatrophy were retrospectively reviewed. Age, neurologic deficit, and history of childhood febrile seizures were recorded and correlated with MR findings of mesial temporal sclerosis, focal cortical or white matter signal intensity abnormalities, ipsilateral thalamic or contralateral cerebellar atrophy, and compensatory calvarial changes.