{
  "ptid_time": "033_S_1098_2017-12-04",
  "img_path": "/data/qiuhui/data/adni/images/033_S_1098/2017-12-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,230 mm³, 15.5% below the reference mean. With a Z-score of -0.42 (33.8th percentile), this represents normal volume ; hippocampal volume measures 5,442 mm³, 16.2% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; whole brain volume measures 859,541 mm³, 7.4% below the reference mean. With a Z-score of -0.89 (18.7th percentile), this represents normal volume ; entorhinal cortex volume measures 2,653 mm³, 23.4% below the reference mean. With a Z-score of -1.26 (10.3th percentile), this represents mild atrophy; fusiform gyrus volume measures 12,422 mm³, 22.9% below the reference mean. With a Z-score of -1.72 (4.3th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 16,803 mm³, 6.8% below the reference mean. With a Z-score of -0.61 (27.3th percentile), this represents normal volume . ",
  "text_data": "Age is 83.0 years. Gender is Female. Education: 15 years. MMSE: 25.0. MoCA: 16.0. Logical Memory: 8.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.89 SUVR (profound elevated). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild to moderate atrophy in key Alzheimer's-related regions (hippocampus, entorhinal cortex, fusiform gyrus), alongside cognitive scores suggesting impairment (MoCA 16, MMSE 25). The presence of APOE4 and elevated AV45 (amyloid PET) further supports Alzheimer's pathology.  \n\n**Diagnosis:** **Dementia (likely Alzheimer’s disease)**  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T05:29:53.668228"
}