Parkinson's disease (PD) Article 1 Clinical Rating Scale for Tremor 1 Diffusion tensor imaging (DTI) 1 MR-guided focused ultrasound 1 Parkinson disease 1 adult 1 age 1 aged 1 balance impairment 1 dysmetria 1 essential tremor 1 essential tremor (ET) 1 female 1 focused ultrasound (FUS) 1 focused ultrasound thalamotomy 1 follow up 1 human 1 major clinical study 1 male 1 medical assessment 1 medical record review 1 middle aged 1 motor dysfunction assessment 1 musculoskeletal system parameters 1 nuclear magnetic resonance imaging 1 parkin gene S/N 167 polymorphism 1 patient safety 1 postoperative period 1 preoperative evaluation 1