{
  "ptid_time": "032_S_5289_2017-05-09",
  "img_path": "/data/qiuhui/data/adni/images/032_S_5289/2017-05-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,157 mm³, 84.3% above the reference mean. With a Z-score of 2.11 (98.3th percentile), this represents significant enlargement; hippocampal volume measures 7,858 mm³, 2.3% above the reference mean. With a Z-score of 0.25 (60.0th percentile), this represents normal volume ; whole brain volume measures 1,042,160 mm³, 1.3% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,065 mm³, 4.4% above the reference mean. With a Z-score of 0.34 (63.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,911 mm³, 1.6% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,236 mm³, 18.1% above the reference mean. With a Z-score of 1.61 (94.6th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 63.2 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 14.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.12 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant ventricular enlargement (Z-score 2.11) and moderate middle temporal gyrus enlargement (Z-score 1.61), which are atypical for normal aging but not yet accompanied by hippocampal or other key regional atrophy. Cognitive scores (MMSE 30, MoCA 30) are intact, and amyloid PET (AV45) is normal, making neurodegenerative dementia unlikely. APOE4 heterozygosity raises AD risk but isn’t diagnostic.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement may reflect early pathology, but normal cognition and amyloid status suggest no current dementia/MCI)",
  "timestamp": "2025-07-26T05:07:47.126923"
}