{
  "ptid_time": "098_S_0172_2007-04-07",
  "img_path": "/data/qiuhui/data/adni/images/098_S_0172/2007-04-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,075 mm³, 49.9% below the reference mean. With a Z-score of -1.14 (12.7th percentile), this represents mild atrophy; hippocampal volume measures 7,708 mm³, 8.3% above the reference mean. With a Z-score of 0.77 (77.8th percentile), this represents normal volume ; whole brain volume measures 1,005,750 mm³, 3.2% above the reference mean. With a Z-score of 0.40 (65.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,651 mm³, 26.6% above the reference mean. With a Z-score of 1.63 (94.9th percentile), this represents moderate enlargement; fusiform gyrus volume measures 16,407 mm³, 3.6% below the reference mean. With a Z-score of -0.32 (37.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,525 mm³, 1.9% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume . ",
  "text_data": "Age is 71.6 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Total tau: 242.30 pg/mL (normal ); Phosphorylated tau: 21.91 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even above-average volumes in key regions like the hippocampus, entorhinal cortex, and whole brain. Cognitive testing (MMSE 30/30) and CSF biomarkers (normal tau) are unremarkable, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:38:45.934938"
}