{
  "ptid_time": "036_S_0672_2009-08-19",
  "img_path": "/data/qiuhui/data/adni/images/036_S_0672/2009-08-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 9,692 mm³, 56.6% below the reference mean. With a Z-score of -1.42 (7.8th percentile), this represents mild atrophy; hippocampal volume measures 8,099 mm³, 5.4% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; whole brain volume measures 998,387 mm³, 3.0% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,828 mm³, 1.7% below the reference mean. With a Z-score of -0.13 (44.9th percentile), this represents normal volume ; fusiform gyrus volume measures 15,726 mm³, 13.6% below the reference mean. With a Z-score of -1.54 (6.2th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 19,748 mm³, 3.8% below the reference mean. With a Z-score of -0.33 (36.9th percentile), this represents normal volume . ",
  "text_data": "Age is 65.0 years. Gender is Female. Education: 12 years. MMSE: 30.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. Biomarker levels: Total tau: 194.10 pg/mL (normal ); Phosphorylated tau: 17.19 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement and moderate fusiform gyrus atrophy, but hippocampal, whole brain, entorhinal cortex, and middle temporal gyrus volumes are within normal ranges. Clinically, the patient has a normal MMSE score (30/30), no APOE4 risk allele, and normal CSF biomarkers (T-tau, P-tau), suggesting no significant cognitive impairment or neurodegenerative pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:03:11.044949"
}