Evaluate ventricular size. Normal pressure hydrocephalus. VP shunt now with increasing headaches. Nonenhanced head CT:Images through posterior fossa are unremarkable and unchanged since prior MRI exam from 2004.Images two supratentorial space demonstrate enlargement of all supratentorial ventricular system. This exam is compared with prior MRI study from 2004. A the transverse axis of the third ventricle on the current head CT measures 16.3-mm compared to prior measurement of 20.7-mm.The transverse measurements of bilateral frontal horns measures 35mm compare to prior measurements of 43.3 mm.There is a BSO a right-sided ventricular catheter with the tip of the catheter in the right frontal horn at the level of foramina of Monroe.Examination also demonstrate small low-density bilateral subdural collections in the frontal and parietal regions. The size of right frontal subdural measures 3.4-mm in thickness and the left frontal subdural measures 4.4-mm in thickness. These subdurals were not present on prior MRI exam from 2004.There is no detectable intraparenchymal hemorrhage or edema. The gray -- white matter differentiation remains within normal.
1.Smaller size of supratentorial ventricular system since prior MRI examination from 2004. There is however persistent enlargement of all supratentorial ventricular system. Right-sided ventricular catheter with the tip in the right frontal horn.2.No detectable parenchymal abnormality.3.Since 2004 are small bilateral frontal and parietal low-density subdural collections which measure 3.4mm in thickness in the right frontal region and 4.4 mm in the left frontal region.