{
  "ptid_time": "136_S_0186_2007-03-05",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0186/2007-03-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,849 mm³, 43.0% above the reference mean. With a Z-score of 1.16 (87.7th percentile), this represents mild enlargement; hippocampal volume measures 7,913 mm³, 21.8% above the reference mean. With a Z-score of 1.75 (96.0th percentile), this represents moderate enlargement; whole brain volume measures 1,025,370 mm³, 10.5% above the reference mean. With a Z-score of 1.26 (89.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,931 mm³, 13.5% above the reference mean. With a Z-score of 0.73 (76.7th percentile), this represents normal volume ; fusiform gyrus volume measures 18,626 mm³, 15.6% above the reference mean. With a Z-score of 1.17 (88.0th percentile), this represents mild enlargement; middle temporal gyrus volume measures 19,773 mm³, 9.7% above the reference mean. With a Z-score of 0.86 (80.5th percentile), this represents normal volume . ",
  "text_data": "Age is 81.4 years. Gender is Female. Education: 16 years. MMSE: 28.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 911.00 pg/mL (normal ); Total tau: 171.10 pg/mL (normal ); Phosphorylated tau: 15.60 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild to moderate enlargement in several regions (ventricular, hippocampal, whole brain, fusiform gyrus), but all are above the reference mean, suggesting no significant atrophy. Cognitive testing (MMSE 28/30) is normal, and CSF biomarkers (Aβ, T-tau, P-tau) are within normal ranges, with no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:57:40.972644"
}