Obsessive-compulsive disorder [F42], Reason for Study: ^Reason: surveillance History: ocd There is no evidence of acute ischemic or new hemorrhagic lesion on this scan.Redemonstration of prior laser ablation foci on bilateral internal capsule anterior limb just lateral aspect of lateral ventricle frontal horns. Those foci show central low signal intensity with surrounding high signal intensity rim, no change in terms of MR characteristics. The size of right side focus remains stable but that of the left appears to be slightly smaller than before and changed its shape from round to elliptical. Bilateral frontal lobes' laser ablation lead tracks are seen with some susceptibility artifacts indicating lead tract blood products, no change since prior scan.On post enhanced image, the left focus still shows evidence of enhancement, however, the extent of the enhancement appears to be much lessen than prior scan.The ventricles, sulci and cisterns are symmetric and unremarkable. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
1. No evidence of acute ischemic or hemorrhagic lesion.2. Interval decrease in size of left laser ablation focus as well as decrease extent of enhancement comparing to prior scan.3. Stable right side ablation focus in terms of size and MR characteristics.4. No change in bilateral lead track blood products.