{
  "ptid_time": "135_S_4566_2014-04-07",
  "img_path": "/data/qiuhui/data/adni/images/135_S_4566/2014-04-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,588 mm³, 22.7% below the reference mean. With a Z-score of -0.61 (27.0th percentile), this represents normal volume ; hippocampal volume measures 7,422 mm³, 14.3% above the reference mean. With a Z-score of 1.14 (87.4th percentile), this represents mild enlargement; whole brain volume measures 963,979 mm³, 3.9% above the reference mean. With a Z-score of 0.46 (67.8th percentile), this represents normal volume . ",
  "text_data": "Age is 85.4 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.27 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal ventricular and whole brain volumes, with mild hippocampal enlargement, which is unusual for Alzheimer's but not necessarily pathological. Cognitive scores (MMSE 30, MoCA 27) are within normal limits, and while AV45 shows mild amyloid elevation, there is no significant structural or cognitive impairment.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild AV45 elevation but no other supporting evidence of decline)",
  "timestamp": "2025-07-26T15:38:21.165239"
}