{
  "ptid_time": "129_S_6459_2020-07-23",
  "img_path": "/data/qiuhui/data/adni/images/129_S_6459/2020-07-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,404 mm³, 40.0% below the reference mean. With a Z-score of -1.00 (15.8th percentile), this represents mild atrophy; hippocampal volume measures 8,400 mm³, 9.3% above the reference mean. With a Z-score of 1.04 (85.2th percentile), this represents mild enlargement; whole brain volume measures 1,050,050 mm³, 2.0% above the reference mean. With a Z-score of 0.25 (60.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,551 mm³, 8.8% below the reference mean. With a Z-score of -0.68 (24.8th percentile), this represents normal volume ; fusiform gyrus volume measures 16,727 mm³, 8.1% below the reference mean. With a Z-score of -0.92 (18.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,678 mm³, 10.5% above the reference mean. With a Z-score of 0.93 (82.5th percentile), this represents normal volume . ",
  "text_data": "Age is 68.0 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even slightly enlarged volumes in key regions like the hippocampus and middle temporal gyrus. Cognitive scores (MMSE, MoCA) are intact, and amyloid PET (AV45) is normal. No APOE4 risk alleles are present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T14:20:05.768226"
}