{
  "ptid_time": "041_S_5078_2017-08-02",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5078/2017-08-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 51,538 mm³, 83.6% above the reference mean. With a Z-score of 1.91 (97.2th percentile), this represents moderate enlargement; hippocampal volume measures 6,449 mm³, 9.4% below the reference mean. With a Z-score of -0.86 (19.6th percentile), this represents normal volume ; whole brain volume measures 974,185 mm³, 0.0% below the reference mean. With a Z-score of -0.01 (49.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,626 mm³, 25.9% above the reference mean. With a Z-score of 1.59 (94.4th percentile), this represents moderate enlargement; fusiform gyrus volume measures 17,585 mm³, 3.4% above the reference mean. With a Z-score of 0.31 (62.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,950 mm³, 1.1% below the reference mean. With a Z-score of -0.10 (46.0th percentile), this represents normal volume . ",
  "text_data": "Age is 71.9 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows moderate ventricular enlargement (83.6% above mean) and entorhinal cortex enlargement (25.9% above mean), but hippocampal volume is normal (-9.4% below mean). Cognitive scores (MMSE 30, MoCA 26) are within normal range, and amyloid PET (AV45) is negative. No APOE4 risk allele is present.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Structural changes suggest early neurodegeneration, but cognitive performance and amyloid status do not yet support MCI or dementia.)",
  "timestamp": "2025-07-26T07:24:12.799992"
}