{
  "ptid_time": "021_S_2125_2011-04-13",
  "img_path": "/data/qiuhui/data/adni/images/021_S_2125/2011-04-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 50,975 mm³, 81.6% above the reference mean. With a Z-score of 1.87 (96.9th percentile), this represents moderate enlargement; hippocampal volume measures 7,199 mm³, 1.2% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; whole brain volume measures 1,131,660 mm³, 16.1% above the reference mean. With a Z-score of 2.03 (97.9th percentile), this represents significant enlargement. ",
  "text_data": "Age is 78.6 years. Gender is Female. Education: 17 years. MMSE: 29.0. MoCA: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is moderately enlarged (81.6% above reference mean, Z-score 1.87), which can indicate atrophy, but hippocampal volume is normal (Z-score 0.11), and whole brain volume is significantly above average (Z-score 2.03). Cognitive scores (MMSE 29, MoCA 27) are within normal range, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Ventricular enlargement raises some concern, but normal hippocampal volume, high cognitive scores, and lack of APOE4 suggest no significant impairment.)",
  "timestamp": "2025-07-26T01:39:34.553497"
}