{
  "ptid_time": "941_S_6471_2020-09-01",
  "img_path": "/data/qiuhui/data/adni/images/941_S_6471/2020-09-01/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,940 mm³, 66.4% below the reference mean. With a Z-score of -1.59 (5.6th percentile), this represents moderate atrophy; hippocampal volume measures 8,793 mm³, 16.3% above the reference mean. With a Z-score of 1.59 (94.4th percentile), this represents moderate enlargement; whole brain volume measures 1,215,270 mm³, 12.6% above the reference mean. With a Z-score of 1.63 (94.9th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,412 mm³, 7.6% above the reference mean. With a Z-score of 0.52 (69.7th percentile), this represents normal volume ; fusiform gyrus volume measures 22,994 mm³, 22.1% above the reference mean. With a Z-score of 1.88 (97.0th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 23,954 mm³, 12.3% above the reference mean. With a Z-score of 1.10 (86.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 73.8 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 0.93 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows moderate ventricular atrophy (Z-score -1.59) but other regions, including the hippocampus, whole brain, and temporal structures, are enlarged or normal. Cognitive scores (MMSE 30, MoCA 27) are within normal limits, and there is no APOE4 risk allele. The atrophy is likely age-related rather than pathological.  \nDiagnosis: CN (Cognitively Normal)  \nConf",
  "timestamp": "2025-07-26T17:48:27.778592"
}