{
  "ptid_time": "023_S_0061_2007-12-13",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0061/2007-12-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,877 mm³, 20.7% above the reference mean. With a Z-score of 0.47 (68.2th percentile), this represents normal volume ; hippocampal volume measures 7,181 mm³, 0.9% above the reference mean. With a Z-score of 0.09 (53.4th percentile), this represents normal volume ; whole brain volume measures 896,991 mm³, 8.0% below the reference mean. With a Z-score of -1.00 (15.8th percentile), this represents mild atrophy; entorhinal cortex volume measures 5,157 mm³, 40.4% above the reference mean. With a Z-score of 2.48 (99.3th percentile), this represents significant enlargement; fusiform gyrus volume measures 16,788 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,430 mm³, 14.3% below the reference mean. With a Z-score of -1.24 (10.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 79.0 years. Gender is Female. Education: 15 years. MMSE: 27.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 995.70 pg/mL (normal ); Total tau: 250.50 pg/mL (normal ); Phosphorylated tau: 22.52 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the whole brain and middle temporal gyrus, but other key regions (hippocampus, entorhinal cortex, fusiform gyrus) are normal or even enlarged. Biomarkers (Aβ, T-tau, P-tau) are normal, and MMSE (27/30) is within the normal range for age. No significant cognitive impairment is evident.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions, but no clinical or biomarker evidence of impairment)",
  "timestamp": "2025-07-26T02:31:37.171395"
}