{
  "ptid_time": "128_S_2002_2018-08-28",
  "img_path": "/data/qiuhui/data/adni/images/128_S_2002/2018-08-28/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,643 mm³, 54.2% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; hippocampal volume measures 7,416 mm³, 1.9% below the reference mean. With a Z-score of -0.19 (42.7th percentile), this represents normal volume ; whole brain volume measures 1,077,550 mm³, 0.2% below the reference mean. With a Z-score of -0.02 (49.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,711 mm³, 9.5% below the reference mean. With a Z-score of -0.64 (26.0th percentile), this represents normal volume ; fusiform gyrus volume measures 20,902 mm³, 11.0% above the reference mean. With a Z-score of 0.93 (82.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,459 mm³, 5.2% above the reference mean. With a Z-score of 0.47 (68.1th percentile), this represents normal volume . ",
  "text_data": "Age is 72.8 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (mild atrophy) but otherwise normal volumes in key regions like the hippocampus, entorhinal cortex, and temporal structures. Cognitive scores (MMSE 29, MoCA 26) are within normal limits for age, and amyloid PET (AV45) is negative. No APOE4 risk allele is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T13:57:19.649044"
}