Investigation of the Possibility of Determining Cerebrovascular Disease Based on Hemodynamic Information of Localized Brain Regions

Inclusion Criteria : 1. For Hemorrhagic Stroke Patients : * Adults aged between 19 and 80 years. * Diagnosed with hemorrhagic stroke through clinical observation and neuroimaging. * First-time hemorrhagic stroke patients. * Hemorrhagic stroke onset between 2 weeks and 12 months prior to screening. * Hemorrhagic lesion located in the cortex or subcortex. * Not taking medications that could affect brain hemodynamics, such as - antihypertensives, anticoagulants, antiplatelets, or antidepressants. * Able to read and understand the informed consent form and participate in questionnaires with sufficient language proficiency. * Voluntarily agree to participate in the study and provide written consent, with the ability to complete the study duration. 2. For Ischemic Stroke Patients : * Adults aged between 19 and 80 years. * Diagnosed with ischemic stroke through clinical observation and neuroimaging. * First-time ischemic stroke patients. * Ischemic stroke onset between 2 weeks and 12 months prior to screening. * Ischemic lesion located in the cortex or subcortex. * Not taking medications that could affect brain hemodynamics, such as antihypertensives, anticoagulants, antiplatelets, or antidepressants. * Able to read and understand the informed consent form and participate in questionnaires with sufficient language proficiency. * Voluntarily agree to participate in the study and provide written consent, with the ability to complete the study duration. 3. For Healthy Adults : * Adults aged between 19 and 80 years. * No history of stroke or transient ischemic attack (TIA). * No stroke risk factors such as hypertension, diabetes, or hyperlipidemia. * No chronic diseases (e.g., cardiovascular disease, chronic kidney disease, chronic lung disease). * No psychiatric conditions (e.g., depression, schizophrenia). * Not taking medications that could affect brain hemodynamics, such as antihypertensives, anticoagulants, antiplatelets, or antidepressants. * Able to read and understand the informed consent form and participate in questionnaires with sufficient language proficiency. * Voluntarily agree to participate in the study and provide written consent, with the ability to complete the study duration. Exclusion Criteria : * History of head trauma in the past 6 months. * Ongoing severe chronic diseases (e.g., heart failure, chronic kidney disease, chronic lung disease). * Severe psychiatric disorders such as schizophrenia, major depression, or bipolar disorder. * Use of medications that could influence brain hemodynamics (e.g., antihypertensives, anticoagulants, antiplatelets, or antidepressants). * Participation in a study and use of experimental drugs within the past 30 days. * Pregnant or breastfeeding women. * Major surgery in the past 6 months. * Acute infections or inflammatory diseases. * Cognitive impairment or dementia. * Neurological disorders. * Inability to understand the study procedures or unwillingness to provide voluntary consent. * Any other clinical concerns deemed inappropriate for participation by the principal investigator or study team.