diff --git a/designcter/_designTemp.py b/designcter/_designTemp.py
index 19a3318..cd2dfee 100644
--- a/designcter/_designTemp.py
+++ b/designcter/_designTemp.py
@@ -1,6 +1,5 @@
 design_template = {
-    "cter_gen": """Exam: {exam_name} {protocol_name_line}
-{phase_design_text}
+    "cter_gen": """Exam: {exam_name}{protocol_name_line}{phase_design_line}
 Contrast route: {contrast_text}
 NPO time: {NPO_time_text}
 eGFR ({eGFR_date_text}): {eGFR_value_text}
diff --git a/designcter/design.py b/designcter/design.py
index 83ab2cb..90ddd35 100644
--- a/designcter/design.py
+++ b/designcter/design.py
@@ -21,13 +21,17 @@ def design_ct(protocol_id: str,
               ):
     
     protocol = protocols[protocol_id]
+    # Protocol Name Line
     ptc_nm = protocol['protocol_name']
     protocol_name_line = "" if ptc_nm is None else f"\nProtocol name: {ptc_nm}"
+    # Phase Design Line
+    pdt = protocol["phase_design_text"]
+    phase_design_line = "" if pdt is None else f"\n{pdt.strip()}"
     
     str_design = design_template["cter_gen"].format(
         exam_name = protocol["exam_name"],
         protocol_name_line = protocol_name_line,
-        phase_design_text = protocol["phase_design_text"].strip(),
+        phase_design_line = phase_design_line,
         contrast_text = protocol["contrast_text"],
         NPO_time_text = NPO_time,
         eGFR_date_text = eGFR_date,
diff --git a/designcter/proto.py b/designcter/proto.py
index a85613d..4c5b722 100644
--- a/designcter/proto.py
+++ b/designcter/proto.py
@@ -1,7 +1,40 @@
-# Group `protocol_id` in each `exam_id`
+# Hierarchical structure Levels
+# `category` -> `exam` -> `protocol`
+
+# Level 1 
+category = ["Body", "Neuro"]
+
+# Level 2
+## Map `exam_id` to `exam_name`
+## The order of this dict appeared in drop down
+exam_id_name = {
+    "Body": {
+        # exam_id: exam_name
+        "ct_wa": "CTWA",
+        "cta_wa": "CTA Whole Abd",
+        "ct_upperabd": "CT Upper Abd",
+        "ct_lowerabd": "CT Lower Abd",
+        "ct_kub": "CT KUB",
+        "cta_pe": "CTA for PE",
+        "ct_chest": "CT Chest",
+        "cta_chest": "CTA Chest",
+        "cta_aorta": "CTA Whole Aorta",
+        "cta_runoff": "CTA runoff"
+    },
+    "Neuro": {
+        "ct_brain_nc": "CT Brain (non-contrast)",
+        "ct_brain_with_cm": "CT Brain with Contrast",
+        "cta_ctv_brain": "CTA/CTV Brain",
+        "ct_neuro_trauma": "CT Neuro Trauma"
+    }
+}
+
+# Level 3
+## Group `protocol_id` in each `exam_id`
 ## The order of element in this list appeared in drop down
-id_exam_protocols = {
-    "ct_wa": ["ct_wa_routine", 
+exam_id_protocol_id = {
+    # Body
+    "ct_wa": ["ct_wa_routine",
               "ct_wa_full",
               "ct_wa_gut_obs",
               "ct_wa_infect",
@@ -15,7 +48,7 @@
               "ct_wa_kidney_mass",
               "ct_wa_gi_mass"],
     "cta_wa": ["cta_wa_mesenteric_ischemia",
-               "cta_wa_gi_bleed", 
+               "cta_wa_gi_bleed",
                "cta_wa_aaa_rupture"],
     "ct_upperabd": [
         "ct_upperabd_routine",
@@ -45,7 +78,7 @@
         "ct_chest_svc"
     ],
     "cta_chest": [
-        "cta_chest_hemoptysis", 
+        "cta_chest_hemoptysis",
         "cta_chest_trauma"
     ],
     "cta_aorta": {
@@ -56,31 +89,29 @@
     "cta_runoff": {
         "cta_runoff_old",
         "cta_runoff_young"
+    },
+    # Neuro
+    "ct_brain_nc": {
+        "ct_brain_nc_routine"
+    },
+    "ct_brain_with_cm": {
+        "ct_brain_with_cm_routine"
+    },
+    "cta_ctv_brain": {
+        "cta_brain_aneurysm",
+        "ctv_brain_vst"
+    },
+    "ct_neuro_trauma": {
+        "cta_neck_trauma"
     }
 }
 
 
-# Map `exam_id` to `exam_name`
-## The order of this dict appeared in drop down
-exam_id_name = {
-    # exam_id: exam_name
-   "ct_wa": "CTWA",
-   "cta_wa": "CTA Whole Abd",
-   "ct_upperabd": "CT Upper Abd",
-   "ct_lowerabd": "CT Lower Abd",
-   "ct_kub": "CT KUB",
-   "cta_pe": "CTA for PE",
-   "ct_chest": "CT Chest",
-   "cta_chest": "CTA Chest",
-   "cta_aorta": "CTA Whole Aorta",
-   "cta_runoff": "CTA runoff"
-}
-
 # Map `protocol_id` to `protocol_name`
 protocols_id_name = {
     # CTWA
     "ct_wa_routine": "Routine WA",
-    "ct_wa_full": "Full WA", 
+    "ct_wa_full": "Full WA",
     "ct_wa_gut_obs": "Gut Obstruction",
     "ct_wa_infect": "Intra-abdominal infection",
     "ct_wa_leak_fist_collect": "Leak-Fistula-Collection",
@@ -101,7 +132,7 @@
     "ct_lowerabd_appendix": "Appendicitis",
     # CT KUB
     "ct_kub_nc": "CT KUB (non-contrast)",
-    "ct_kub_stone": "KUB Stone", 
+    "ct_kub_stone": "KUB Stone",
     "ct_kub_hematuria": "Hematuria",
     "ct_kub_kidney_mass": "Kidney mass/Abscess",
     # CTA WA
@@ -119,7 +150,7 @@
     "ct_chest_dysphagia": "Dysphagia",
     "ct_chest_eso": "CT esophagogram",
     "ct_chest_svc": "SVC Obstruction",
-    
+
     # CTA Chest
     "cta_chest_hemoptysis": "Hemoptysis",
     "cta_chest_trauma": "CTA Chest trauma",
@@ -129,29 +160,38 @@
     "cta_aorta_aaa_postop": "AAA Post-op",
     # CTA Runoff
     "cta_runoff_old": "CTA Runoff",
-    "cta_runoff_young": "CTA Runoff (< 60 yr)"
+    "cta_runoff_young": "CTA Runoff (< 60 yr)",
+    # CT Brain (NC)
+    "ct_brain_nc_routine": "CT Brain (non-contrast)",
+    # CTA/CTV Brain
+    "cta_brain_aneurysm": "Intracranial aneurysm",
+    "ctv_brain_vst": "Venous Sinus Thrombosis",
+    # CT Brain with CM
+    "ct_brain_with_cm_routine": "CT Brain with Contrast",
+    # CT Neuro Trauma
+    "cta_neck_trauma": "CT Neck Trauma"
 }
 
 
 # Actual Protocols
 protocols = {
     # by `protocol_id`
-    
+
     # CTWA
-    ## Routine WA
+    # Routine WA
     "ct_wa_routine": {
         "protocol_name": protocols_id_name["ct_wa_routine"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous (whole)
 - Delay (liver)
 """,
         "contrast_text": "Oral (limited water), Rectal (water)"
     },
-    ## Full WA
+    # Full WA
     "ct_wa_full": {
         "protocol_name": None,
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (whole)
 - Late A (upper)
@@ -159,11 +199,11 @@
 - Delay (liver)
 """,
         "contrast_text": "Oral (?), Rectal (?)"
-    },  
-    ## Solid Organ Rupture
+    },
+    # Solid Organ Rupture
     "ct_wa_solid_rupture": {
         "protocol_name": protocols_id_name["ct_wa_solid_rupture"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (whole)
 - Late A (upper)
@@ -172,40 +212,40 @@
 """,
         "contrast_text": "No oral, No rectal"
     },
-    ## Free Air
+    # Free Air
     "ct_wa_free_air": {
         "protocol_name": protocols_id_name["ct_wa_free_air"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain
 - Venous (may be)
 """,
         "contrast_text": "Oral (positive), Rectal (positive) [If not stable -> no oral, no rectal]"
     },
-    ## GI Perforate
+    # GI Perforate
     "ct_wa_gi_perforate": {
         "protocol_name": protocols_id_name["ct_wa_gi_perforate"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous
 - Delay (liver)
 """,
         "contrast_text": "Oral (limited positive), Rectal (positive)"
     },
-    ## Gut Obstruction 
+    # Gut Obstruction
     "ct_wa_gut_obs": {
         "protocol_name": protocols_id_name["ct_wa_gut_obs"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous (whole)
 - Delay 3 min (liver)
 """,
         "contrast_text": "No oral, No rectal"
     },
-    ## HBP mass/abscess (CTWA)
+    # HBP mass/abscess (CTWA)
     "ct_wa_hbp_mass": {
         "protocol_name": protocols_id_name["ct_wa_hbp_mass"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (upper)
 - Late A (upper)
@@ -214,10 +254,10 @@
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## Kidney mass/abscess
+    # Kidney mass/abscess
     "ct_wa_kidney_mass": {
         "protocol_name": protocols_id_name["ct_wa_kidney_mass"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (KUB)
 - Late A (upper)
@@ -226,30 +266,30 @@
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## GI Mass
+    # GI Mass
     "ct_wa_gi_mass": {
         "protocol_name": protocols_id_name["ct_wa_gi_mass"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous (whole)
 - Delay (liver)
 """,
         "contrast_text": "Oral (full positive), Rectal (water)"
     },
-    ## Diverticulitis
+    # Diverticulitis
     "ct_wa_diver": {
         "protocol_name": protocols_id_name["ct_wa_diver"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous (whole)
 - Delay (liver)
 """,
         "contrast_text": "Oral (limited water), Rectal (1 L, positive CM)"
     },
-    ## Pancreatitis
+    # Pancreatitis
     "ct_wa_pancrea": {
         "protocol_name": protocols_id_name["ct_wa_pancrea"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (upper)
 - Late A (upper)
@@ -258,10 +298,10 @@
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## Intra-abdominal infection
+    # Intra-abdominal infection
     "ct_wa_infect": {
         "protocol_name": protocols_id_name["ct_wa_infect"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Plain (whole)
 - Late A (upper)
@@ -270,10 +310,10 @@
 """,
         "contrast_text": "Oral (limited water), Rectal (water)"
     },
-    ## Leak-Fistula-Collection
+    # Leak-Fistula-Collection
     "ct_wa_leak_fist_collect": {
         "protocol_name": protocols_id_name["ct_wa_leak_fist_collect"],
-        "exam_name": exam_id_name["ct_wa"],
+        "exam_name": exam_id_name["Body"]["ct_wa"],
         "phase_design_text": """
 - Venous (whole)
 - Delay (liver)
@@ -282,24 +322,24 @@
     },
     # "protocol_id": {
     #     "protocol_name": protocols_id_name["protocol_id"],
-    #     "exam_name": exam_id_name["xxx"],
+    #     "exam_name": exam_id_name["Body"]["xxx"],
     #     "phase_design_text": """""",
     #     "contrast_text": ""
     # },
-    ## Routine Upper Abd
+    # Routine Upper Abd
     "ct_upperabd_routine": {
         "protocol_name": protocols_id_name["ct_upperabd_routine"],
-        "exam_name": exam_id_name["ct_upperabd"],
+        "exam_name": exam_id_name["Body"]["ct_upperabd"],
         "phase_design_text": """
 - Venous (upper)
 - Delay (upper)
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## HBP mass/abscess (Upper)
+    # HBP mass/abscess (Upper)
     "ct_upperabd_hbp_mass": {
         "protocol_name": protocols_id_name["ct_upperabd_hbp_mass"],
-        "exam_name": exam_id_name["ct_upperabd"],
+        "exam_name": exam_id_name["Body"]["ct_upperabd"],
         "phase_design_text": """
 - Plain (upper)
 - Late A (upper)
@@ -308,10 +348,10 @@
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## Biliary Stone
+    # Biliary Stone
     "ct_upperabd_biliary_stone": {
         "protocol_name": protocols_id_name["ct_upperabd_biliary_stone"],
-        "exam_name": exam_id_name["ct_upperabd"],
+        "exam_name": exam_id_name["Body"]["ct_upperabd"],
         "phase_design_text": """
 - Plain (upper)
 - Late A (upper)
@@ -320,10 +360,10 @@
 """,
         "contrast_text": "Oral (limited water), No rectal"
     },
-    ## Adrenal mass/abscess
+    # Adrenal mass/abscess
     "ct_upperabd_adrenal_mass": {
         "protocol_name": protocols_id_name["ct_upperabd_adrenal_mass"],
-        "exam_name": exam_id_name["ct_upperabd"],
+        "exam_name": exam_id_name["Body"]["ct_upperabd"],
         "phase_design_text": """
 - Plain (upper)
 - Late A (upper)
@@ -335,21 +375,21 @@
     },
     # "protocol_id": {
     #     "protocol_name": protocols_id_name["protocol_id"],
-    #     "exam_name": exam_id_name["xxx"],
+    #     "exam_name": exam_id_name["Body"]["xxx"],
     #     "phase_design_text": """""",
     #     "contrast_text": ""
     # },
     # CT lower abd
     "ct_lowerabd_appendix": {
         "protocol_name": protocols_id_name["ct_lowerabd_appendix"],
-        "exam_name": exam_id_name["ct_lowerabd"],
+        "exam_name": exam_id_name["Body"]["ct_lowerabd"],
         "phase_design_text": """
 - Venous 120 sec (L3 to pubic symphysis)
 """,
         "contrast_text": "Rectal (Positive 1 L สวนถึง cecum), No oral"
     },
     # CT KUB
-    ## CT KUB (non-contrast)
+    # CT KUB (non-contrast)
     "ct_kub_nc": {
         "protocol_name": None,
         "exam_name": "CT KUB (non-contrast)",
@@ -359,7 +399,7 @@
 """,
         "contrast_text": "No Oral, No Rectal"
     },
-    ## KUB Stone (non-contrast)
+    # KUB Stone (non-contrast)
     "ct_kub_stone": {
         "protocol_name": protocols_id_name["ct_kub_stone"],
         "exam_name": "CT KUB (non-contrast)",
@@ -369,10 +409,10 @@
 """,
         "contrast_text": "No Oral, No Rectal"
     },
-    ## Hematuria
+    # Hematuria
     "ct_kub_hematuria": {
         "protocol_name": protocols_id_name["ct_kub_hematuria"],
-        "exam_name": exam_id_name["ct_kub"],
+        "exam_name": exam_id_name["Body"]["ct_kub"],
         "phase_design_text": """
 - Plain (KUB)
 - Late A (Kidney)
@@ -382,10 +422,10 @@
 """,
         "contrast_text": "Oral (limited water), No Rectal"
     },
-    ## Kidney mass/Abscess
+    # Kidney mass/Abscess
     "ct_kub_kidney_mass": {
         "protocol_name": protocols_id_name["ct_kub_kidney_mass"],
-        "exam_name": exam_id_name["ct_kub"],
+        "exam_name": exam_id_name["Body"]["ct_kub"],
         "phase_design_text": """
 *** If suspect renal mass → consider CTWA for staging
 - Plain (KUB)
@@ -398,15 +438,15 @@
     },
     # "protocol_id": {
     #     "protocol_name": protocols_id_name["protocol_id"],
-    #     "exam_name": exam_id_name["xxx"],
+    #     "exam_name": exam_id_name["Body"]["xxx"],
     #     "phase_design_text": """""",
     #     "contrast_text": ""
     # },
     # CTA WA
-    ## GI Bleed
+    # GI Bleed
     "cta_wa_gi_bleed": {
         "protocol_name": protocols_id_name["cta_wa_gi_bleed"],
-        "exam_name": exam_id_name["cta_wa"],
+        "exam_name": exam_id_name["Body"]["cta_wa"],
         "phase_design_text": """
 - Plain (whole)
 - CTA (whole)
@@ -415,10 +455,10 @@
 """,
         "contrast_text": "No oral, No rectal"
     },
-    ## Mesenteric Ischemia
+    # Mesenteric Ischemia
     "cta_wa_mesenteric_ischemia": {
         "protocol_name": protocols_id_name["cta_wa_mesenteric_ischemia"],
-        "exam_name": exam_id_name["cta_wa"],
+        "exam_name": exam_id_name["Body"]["cta_wa"],
         "phase_design_text": """
 - Plain (whole)
 - CTA (whole)
@@ -429,7 +469,7 @@
     },
     "cta_wa_aaa_rupture": {
         "protocol_name": protocols_id_name["cta_wa_aaa_rupture"],
-        "exam_name": exam_id_name["cta_wa"],
+        "exam_name": exam_id_name["Body"]["cta_wa"],
         "phase_design_text": """
 - Plain (whole)
 - CTA (maybe ถ้ามีเวลา คนไข้ stable)
@@ -440,7 +480,7 @@
     # CTA for PE
     "cta_pe_no_dvt": {
         "protocol_name": protocols_id_name["cta_pe_no_dvt"],
-        "exam_name": exam_id_name["cta_pe"],
+        "exam_name": exam_id_name["Body"]["cta_pe"],
         "phase_design_text": """
 - CTPA (chest)
 - Venous (chest)
@@ -449,7 +489,7 @@
     },
     "cta_pe_with_dvt": {
         "protocol_name": protocols_id_name["cta_pe_with_dvt"],
-        "exam_name": exam_id_name["cta_pe"],
+        "exam_name": exam_id_name["Body"]["cta_pe"],
         "phase_design_text": """
 - CTPA (chest)
 - Venous (chest, legs)
@@ -458,22 +498,22 @@
     },
     # "protocol_id": {
     #     "protocol_name": protocols_id_name["protocol_id"],
-    #     "exam_name": exam_id_name["xxx"],
+    #     "exam_name": exam_id_name["Body"]["xxx"],
     #     "phase_design_text": """""",
     #     "contrast_text": ""
     # },
     # CT Chest
-    ## Routine Chest
+    # Routine Chest
     "ct_chest_routine": {
         "protocol_name": protocols_id_name["ct_chest_routine"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - **maybe** plain (chest)
 - Late A (chest)
 """,
         "contrast_text": "IV contrast"
-    },   
-    ## CT Chest (non-contrast)
+    },
+    # CT Chest (non-contrast)
     "ct_chest_nc": {
         "protocol_name": None,
         "exam_name": "CT Chest (non-contrast)",
@@ -482,39 +522,39 @@
 """,
         "contrast_text": "No IV contrast"
     },
-    ## Nodule/mass characterization
+    # Nodule/mass characterization
     "ct_chest_nodule_mass": {
         "protocol_name": protocols_id_name["ct_chest_nodule_mass"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - Plain (chest)
 - Late A (chest)
 """,
         "contrast_text": "IV contrast"
     },
-    ## Tracheobronchomalacia
+    # Tracheobronchomalacia
     "ct_chest_tbm": {
         "protocol_name": protocols_id_name["ct_chest_tbm"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - Plain (chest, dynamic expiration)
 """,
         "contrast_text": "No IV contrast"
     },
-    ## Dysphagia
+    # Dysphagia
     "ct_chest_dysphagia": {
         "protocol_name": protocols_id_name["ct_chest_dysphagia"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - Plain (chest)
 - Venous (chest)
 """,
         "contrast_text": "IV contrast, Oral (limited water)"
     },
-    ## CT esophagogram
+    # CT esophagogram
     "ct_chest_eso": {
         "protocol_name": protocols_id_name["ct_chest_eso"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - Plain (Chest, reduced dose) ก่อนกิน CM
 - จากนั้น กิน CM 1 cup (250 ml) ที่เตียง
@@ -524,7 +564,7 @@
     },
     "ct_chest_svc": {
         "protocol_name": protocols_id_name["ct_chest_svc"],
-        "exam_name": exam_id_name["ct_chest"],
+        "exam_name": exam_id_name["Body"]["ct_chest"],
         "phase_design_text": """
 - Plain (Chest, reduced dose)
 - Late A (Chest)
@@ -533,10 +573,10 @@
         "contrast_text": "IV contrast"
     },
     # CTA Chest
-    ## Hemoptysis
+    # Hemoptysis
     "cta_chest_hemoptysis": {
         "protocol_name": protocols_id_name["cta_chest_hemoptysis"],
-        "exam_name": exam_id_name["cta_chest"],
+        "exam_name": exam_id_name["Body"]["cta_chest"],
         "phase_design_text": """
 - Plain (Chest)
 - CTA (Apex to L2) → Systemic arterial phase
@@ -545,10 +585,10 @@
 """,
         "contrast_text": "IV contrast"
     },
-    ## CTA Chest trauma
+    # CTA Chest trauma
     "cta_chest_trauma": {
         "protocol_name": protocols_id_name["cta_chest_trauma"],
-        "exam_name": exam_id_name["cta_chest"],
+        "exam_name": exam_id_name["Body"]["cta_chest"],
         "phase_design_text": """
 - CTA (chest)
 - Venous (chest)
@@ -556,21 +596,21 @@
         "contrast_text": "IV Contrast"
     },
     # CTA Aorta
-    ## Aorta first time
+    # Aorta first time
     "cta_aorta_first": {
         "protocol_name": protocols_id_name["cta_aorta_first"],
-        "exam_name": exam_id_name["cta_aorta"],
+        "exam_name": exam_id_name["Body"]["cta_aorta"],
         "phase_design_text": """
 - Plain (whole aorta)
 - CTA (whole aorta)
 - Immediate delay (whole aorta)
 """,
         "contrast_text": "IV contrast"
-    },    
-    ## Aortic Dissection
+    },
+    # Aortic Dissection
     "cta_aorta_dissect": {
         "protocol_name": protocols_id_name["cta_aorta_dissect"],
-        "exam_name": exam_id_name["cta_aorta"],
+        "exam_name": exam_id_name["Body"]["cta_aorta"],
         "phase_design_text": """
 - Plain (whole aorta)
 - CTA (whole aorta)
@@ -578,10 +618,10 @@
 """,
         "contrast_text": "IV contrast"
     },
-    ## AAA Post-op
+    # AAA Post-op
     "cta_aorta_aaa_postop": {
         "protocol_name": protocols_id_name["cta_aorta_aaa_postop"],
-        "exam_name": exam_id_name["cta_aorta"],
+        "exam_name": exam_id_name["Body"]["cta_aorta"],
         "phase_design_text": """
 - Plain (whole aorta)
 - CTA (whole aorta)
@@ -592,7 +632,7 @@
     # CTA Runoff
     "cta_runoff_old": {
         "protocol_name": protocols_id_name["cta_runoff_old"],
-        "exam_name": exam_id_name["cta_runoff"],
+        "exam_name": exam_id_name["Body"]["cta_runoff"],
         "phase_design_text": """
 ขา → Aortic bifurcation to feet
 แขน → mid-heart to hands
@@ -601,10 +641,10 @@
 - Immediate delay
 """,
         "contrast_text": "IV contrast"
-    },   
+    },
     "cta_runoff_young": {
         "protocol_name": protocols_id_name["cta_runoff_young"],
-        "exam_name": exam_id_name["cta_runoff"],
+        "exam_name": exam_id_name["Body"]["cta_runoff"],
         "phase_design_text": """
 ขา → Aortic bifurcation to feet
 แขน → mid-heart to hands
@@ -612,10 +652,54 @@
 - Immediate delay
 """,
         "contrast_text": "IV contrast"
-    },   
+    },
+    # Neuro
+    # CT Brain
+    ## CT Brain 
+    "ct_brain_nc_routine": {
+        "protocol_name": None,
+        "exam_name": exam_id_name["Neuro"]["ct_brain_nc"],
+        "phase_design_text": None,
+        "contrast_text": "No IV contrast"
+    },
+    # CTA Brain
+    ## Intracranial aneurysm
+    "cta_brain_aneurysm": {
+        "protocol_name": protocols_id_name["cta_brain_aneurysm"],
+        "exam_name": "CTA Brain",
+        "phase_design_text": """
+- Plain, CTA, post-contrast (Brain)
+""",
+        "contrast_text": "IV contrast"
+    },
+    "ctv_brain_vst": {
+        "protocol_name": protocols_id_name["ctv_brain_vst"],
+        "exam_name": "CTV Brain",
+        "phase_design_text": """
+- Plain, CTV, post-contrast (Brain)
+""",
+        "contrast_text": "IV contrast"
+    },
+    "ct_brain_with_cm_routine": {
+        "protocol_name": None,
+        "exam_name": exam_id_name["Neuro"]["ct_brain_with_cm"],
+        "phase_design_text": """
+- Plain, post-contrast (Brain)
+""",
+        "contrast_text": "IV contrast"
+    },
+    "cta_neck_trauma": {
+        "protocol_name": protocols_id_name["cta_neck_trauma"],
+        "exam_name": exam_id_name["Neuro"]["ct_neuro_trauma"],
+        "phase_design_text": """
+- CTA (brain, neck) COW to arch
+- Post-contrast (brain)
+""",
+        "contrast_text": "IV contrast"
+    },
     # "protocol_id": {
     #     "protocol_name": protocols_id_name["protocol_id"],
-    #     "exam_name": exam_id_name["xxx"],
+    #     "exam_name": exam_id_name["Neuro"]["xxx"],
     #     "phase_design_text": """""",
     #     "contrast_text": ""
     # },
@@ -624,18 +708,25 @@
 
 # Reverse Mapping
 
+# Level 2 (reversed)
 ## Map `exam_name` to `exam_id`
-exam_name_id_map = {v: k for k, v in exam_id_name.items()}
+## exam_name_id = {v: k for k, v in exam_id_name.items()}
+exam_name_id = {}
+
+for key, value_dict in exam_id_name.items():
+    value_dict_inv = {v: k for k, v in value_dict.items()}
+    exam_name_id[key] = value_dict_inv
 
-## Map `protocol_name` to `protocol_id`
-protocols_name_id_map = {v: k for k, v in protocols_id_name.items()}
+# Map `protocol_name` to `protocol_id`
+protocols_name_id = {v: k for k, v in protocols_id_name.items()}
 
+# Level 3 (reversed)
 ## Group `protocol_name` in each `exam_id`
-exam_id_protocols_name_map = {}
+exam_id_protocol_name = {}
 
-## Loop through each key and list in dict1
-for key, value_list in id_exam_protocols.items():
+# Loop through each key and list in dict1
+for key, value_list in exam_id_protocol_id.items():
     # Map each value in the list to its corresponding value in dict2
     mapped_list = [protocols_id_name[value] for value in value_list]
     # Store the mapped list in the result dictionary
-    exam_id_protocols_name_map[key] = mapped_list
+    exam_id_protocol_name[key] = mapped_list
diff --git a/dev/test-merger/pro_body_mini.py b/dev/test-merger/pro_body_mini.py
index c442e59..b70d942 100644
--- a/dev/test-merger/pro_body_mini.py
+++ b/dev/test-merger/pro_body_mini.py
@@ -1,4 +1,4 @@
-body_id_exam_protocols = {
+body_exam_id_protocol_id = {
     "ct_wa": ["ct_wa_routine"],
     "ct_kub": ["ct_kub_nc", "ct_kub_stone"]
 }
diff --git a/dev/testing.ipynb b/dev/testing.ipynb
index b7d6369..8de2165 100644
--- a/dev/testing.ipynb
+++ b/dev/testing.ipynb
@@ -112,7 +112,7 @@
     }
    ],
    "source": [
-    "designcter.proto.exam_id_protocols_name_map"
+    "designcter.proto.exam_id_protocol_name"
    ]
   },
   {
@@ -228,8 +228,8 @@
     "   \"ct_upperabd\": \"CT Upper Abd\"\n",
     "}\n",
     "\n",
-    "exam_name_id_map = {v: k for k, v in exam_id_name.items()}\n",
-    "exam_name_id_map"
+    "exam_name_id = {v: k for k, v in exam_id_name.items()}\n",
+    "exam_name_id"
    ]
   },
   {
@@ -289,6 +289,58 @@
    "source": [
     "type(datetime.date.today().strftime('%d/%m/%Y'))"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'Body': {'CTWA': 'ct_wa',\n",
+       "  'CTA Whole Abd': 'cta_wa',\n",
+       "  'CT Upper Abd': 'ct_upperabd',\n",
+       "  'CT Lower Abd': 'ct_lowerabd',\n",
+       "  'CT KUB': 'ct_kub',\n",
+       "  'CTA for PE': 'cta_pe',\n",
+       "  'CT Chest': 'ct_chest',\n",
+       "  'CTA Chest': 'cta_chest',\n",
+       "  'CTA Whole Aorta': 'cta_aorta',\n",
+       "  'CTA runoff': 'cta_runoff'}}"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "exam_id_name = {\n",
+    "    \"Body\": {\n",
+    "        # exam_id: exam_name\n",
+    "        \"ct_wa\": \"CTWA\",\n",
+    "        \"cta_wa\": \"CTA Whole Abd\",\n",
+    "        \"ct_upperabd\": \"CT Upper Abd\",\n",
+    "        \"ct_lowerabd\": \"CT Lower Abd\",\n",
+    "        \"ct_kub\": \"CT KUB\",\n",
+    "        \"cta_pe\": \"CTA for PE\",\n",
+    "        \"ct_chest\": \"CT Chest\",\n",
+    "        \"cta_chest\": \"CTA Chest\",\n",
+    "        \"cta_aorta\": \"CTA Whole Aorta\",\n",
+    "        \"cta_runoff\": \"CTA runoff\"\n",
+    "    }\n",
+    "}\n",
+    "\n",
+    "\n",
+    "exam_name_id = {}\n",
+    "\n",
+    "for key, value_dict in exam_id_name.items():\n",
+    "    value_dict_inv = {v: k for k, v in value_dict.items()}\n",
+    "    exam_name_id[key] = value_dict_inv\n",
+    "\n",
+    "exam_name_id"
+   ]
   }
  ],
  "metadata": {
diff --git a/main.py b/main.py
index 4836d5b..2a7fdf6 100644
--- a/main.py
+++ b/main.py
@@ -10,10 +10,10 @@
 )
 import designcter
 from designcter.proto import (
-    exam_id_name, 
-    exam_name_id_map, 
-    protocols_name_id_map,
-    exam_id_protocols_name_map
+    category,
+    exam_id_name, exam_name_id,
+    exam_id_protocol_name,
+    protocols_name_id, 
 )
 from designcter._utils import dash_if_blank
 
@@ -21,13 +21,20 @@
 class InputDesign(ft.UserControl):
     def __init__(self):
         super().__init__()
-        ## Input: Exam Name
+        ## DropDown 1: Category
+        self.input_category = ft.Dropdown(
+            label="Category", hint_text="Category",
+            options=[ft.dropdown.Option(x) for x in category],
+            on_change=self.input_category_changed
+        )
+        
+        ## DropDown 2: Exam Name
         self.input_exam_name = ft.Dropdown(
             label="Exam", hint_text="Type of Study",
-            options=[ft.dropdown.Option(x) for x in exam_id_name.values()],
+            # options=[ft.dropdown.Option(x) for x in exam_id_name.values()],
             on_change=self.input_exam_name_changed
         )
-        ## Input: Protocol Name
+        ## DropDown 3: Protocol Name
         self.input_protocol_name = ft.Dropdown(
             label="Protocol", hint_text="Protocol Name",
             on_change=self.input_protocol_name_changed
@@ -53,28 +60,36 @@ def __init__(self):
         self.input_ref_phy_name = ft.TextField(label="Ref physician name", hint_text="Name of Ref physician")
         ## TextField: ref_phy_tel
         self.input_ref_phy_tel = ft.TextField(label="Ref physician tel", hint_text="PCT of Ref physician")
+    
+    # Level 1 DropDown
+    def input_category_changed(self, e):
+        print(f"Dropdown Category: {self.input_category.value}")
         
+        exam_id_name_selected = exam_id_name[self.input_category.value]
+        ## Update Level 2 DropDown Option
+        self.input_exam_name.options = [ft.dropdown.Option(x) for x in exam_id_name_selected.values()]
+        self.input_exam_name.update()
         
-        
+    # Level 2 DropDown
     def input_exam_name_changed(self, e):
         print(f"Dropdown Exam: {self.input_exam_name.value}")
-        self.input_exam_name.update()
         
-        # Value of `input_protocol_name` depend on `input_exam_name`
-        exam_id = exam_name_id_map[self.input_exam_name.value]
-        protocol_names = exam_id_protocols_name_map[exam_id]
-        self.input_protocol_name.options = [ft.dropdown.Option(x) for x in protocol_names]
+        exam_id_selected = exam_name_id[self.input_category.value][self.input_exam_name.value]
+        protocol_names_selected = exam_id_protocol_name[exam_id_selected]
+        
+        self.input_protocol_name.options = [ft.dropdown.Option(x) for x in protocol_names_selected]
         self.input_protocol_name.update()
         
+
     def input_protocol_name_changed(self, e):
         print(f"Dropdown Protocol: {self.input_protocol_name.value}")
-        self.input_protocol_name.update()
 
     ## Build Input UI
     def build(self):
         return Container(
             content=Column(
-                [self.input_exam_name,
+                [self.input_category,
+                 self.input_exam_name,
                  self.input_protocol_name,
                  Row([self.input_ETT, self.input_C1, self.input_pregnancy], alignment=ft.MainAxisAlignment.START),
                  Row([self.input_eGFR_value, self.input_eGFR_date], alignment=ft.MainAxisAlignment.START),
@@ -88,7 +103,7 @@ def build(self):
     ## Get All Selected Input Values
     def get(self):
         out = {
-            "protocol_id": protocols_name_id_map[self.input_protocol_name.value],
+            "protocol_id": protocols_name_id[self.input_protocol_name.value],
             "NPO_time": dash_if_blank(self.input_NPO_time.value),
             "eGFR_value": dash_if_blank(self.input_eGFR_value.value), 
             "eGFR_date": self.input_eGFR_date.value,
@@ -176,8 +191,8 @@ def theme_changed(e):
     # Page Size
     page.window_min_width = 780
     page.window_width = 780
-    page.window_min_height = 725
-    page.window_height = 725
+    page.window_min_height = 790
+    page.window_height = 790
     # App Bar
     page.appbar = ft.CupertinoAppBar(
         leading=ft.Icon(ft.icons.PALETTE),