{
  "ptid_time": "002_S_4262_2012-10-25",
  "img_path": "/data/qiuhui/data/adni/images/002_S_4262/2012-10-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 65,851 mm³, 134.6% above the reference mean. With a Z-score of 3.08 (99.9th percentile), this represents profound enlargement; hippocampal volume measures 7,023 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume ; whole brain volume measures 952,560 mm³, 2.3% below the reference mean. With a Z-score of -0.29 (38.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,708 mm³, 1.0% above the reference mean. With a Z-score of 0.06 (52.3th percentile), this represents normal volume ; fusiform gyrus volume measures 15,500 mm³, 8.9% below the reference mean. With a Z-score of -0.81 (20.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,452 mm³, 6.7% above the reference mean. With a Z-score of 0.58 (71.9th percentile), this represents normal volume . ",
  "text_data": "Age is 73.8 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The ventricular volume is significantly enlarged (Z-score 3.08), which is a marker of brain atrophy, but hippocampal, whole brain, and other regional volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 27) are intact, and there is no APOE4 risk allele.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (ventricular enlargement is notable, but cognitive performance and other volumes are normal; clinical correlation is needed to rule out early",
  "timestamp": "2025-07-25T20:26:00.902075"
}