{
  "ptid_time": "137_S_0686_2008-08-21",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0686/2008-08-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,640 mm³, 5.5% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume ; hippocampal volume measures 8,366 mm³, 10.7% above the reference mean. With a Z-score of 1.04 (85.1th percentile), this represents mild enlargement; whole brain volume measures 1,119,560 mm³, 3.7% above the reference mean. With a Z-score of 0.48 (68.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,991 mm³, 2.7% below the reference mean. With a Z-score of -0.18 (42.8th percentile), this represents normal volume ; fusiform gyrus volume measures 18,449 mm³, 2.1% below the reference mean. With a Z-score of -0.18 (43.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,849 mm³, 2.3% below the reference mean. With a Z-score of -0.21 (41.8th percentile), this represents normal volume . ",
  "text_data": "Age is 74.0 years. Gender is Male. Education: 20 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 755.40 pg/mL (normal ); Total tau: 166.00 pg/mL (normal ); Phosphorylated tau: 14.08 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges or mildly enlarged (hippocampus), with no significant atrophy. Biomarkers (Aβ, T-tau, P-tau) are normal, and cognitive performance (MMSE 30/30) is intact.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:15:27.679649"
}