{
  "ptid_time": "002_S_0559_2008-08-15",
  "img_path": "/data/qiuhui/data/adni/images/002_S_0559/2008-08-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 39,154 mm³, 16.7% below the reference mean. With a Z-score of -0.49 (31.4th percentile), this represents normal volume ; hippocampal volume measures 7,327 mm³, 5.2% above the reference mean. With a Z-score of 0.45 (67.2th percentile), this represents normal volume ; whole brain volume measures 1,093,720 mm³, 6.3% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,977 mm³, 0.2% above the reference mean. With a Z-score of 0.01 (50.5th percentile), this represents normal volume ; fusiform gyrus volume measures 19,246 mm³, 6.5% above the reference mean. With a Z-score of 0.57 (71.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,257 mm³, 15.3% above the reference mean. With a Z-score of 1.37 (91.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 81.3 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 14.0. APOEε4 alleles: 1.0. Biomarker levels: Amyloid beta: 876.80 pg/mL (normal ); Total tau: 166.80 pg/mL (normal ); Phosphorylated tau: 13.76 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within or above normal ranges, with no significant atrophy. MMSE is intact (30/30), and CSF biomarkers (Aβ, T-tau, P-tau) are normal or mildly reduced, ruling out Alzheimer's pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:02:46.169287"
}