{
  "ptid_time": "127_S_4645_2014-04-17",
  "img_path": "/data/qiuhui/data/adni/images/127_S_4645/2014-04-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,488 mm³, 51.4% above the reference mean. With a Z-score of 1.18 (88.0th percentile), this represents mild enlargement; hippocampal volume measures 7,400 mm³, 4.0% above the reference mean. With a Z-score of 0.37 (64.4th percentile), this represents normal volume ; whole brain volume measures 1,036,270 mm³, 6.3% above the reference mean. With a Z-score of 0.80 (78.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,747 mm³, 2.0% above the reference mean. With a Z-score of 0.12 (54.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,331 mm³, 1.9% above the reference mean. With a Z-score of 0.17 (56.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,779 mm³, 8.4% above the reference mean. With a Z-score of 0.73 (76.7th percentile), this represents normal volume . ",
  "text_data": "Age is 78.3 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.22 SUVR (mild elevated). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild ventricular enlargement but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 30, MoCA 29) are intact, and APOE4 is negative, though AV45 shows mild amyloid elevation.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Mild ventricular enlargement and AV45 elevation suggest early biomarker changes, but cognitive performance remains intact.)",
  "timestamp": "2025-07-26T13:20:51.924422"
}