{
  "ptid_time": "024_S_2239_2019-06-03",
  "img_path": "/data/qiuhui/data/adni/images/024_S_2239/2019-06-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,687 mm³, 38.6% below the reference mean. With a Z-score of -1.04 (14.9th percentile), this represents mild atrophy; hippocampal volume measures 7,039 mm³, 8.4% above the reference mean. With a Z-score of 0.67 (74.9th percentile), this represents normal volume ; whole brain volume measures 978,515 mm³, 5.4% above the reference mean. With a Z-score of 0.65 (74.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,908 mm³, 12.9% above the reference mean. With a Z-score of 0.69 (75.6th percentile), this represents normal volume ; fusiform gyrus volume measures 18,993 mm³, 17.9% above the reference mean. With a Z-score of 1.35 (91.1th percentile), this represents mild enlargement; middle temporal gyrus volume measures 21,818 mm³, 21.0% above the reference mean. With a Z-score of 1.87 (96.9th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 82.0 years. Gender is Female. Education: 15 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.23 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal or even enlarged volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 27, MoCA 25) are within normal limits for age, and AV45 shows only mild amyloid elevation.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to mild ventricular atrophy and AV45 elevation, but preserved cognitive function and no significant atrophy in AD-vulnerable regions)",
  "timestamp": "2025-07-26T03:17:04.550075"
}