{
  "ptid_time": "099_S_0534_2007-05-23",
  "img_path": "/data/qiuhui/data/adni/images/099_S_0534/2007-05-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,509 mm³, 51.6% above the reference mean. With a Z-score of 1.23 (89.0th percentile), this represents mild enlargement; hippocampal volume measures 8,683 mm³, 8.2% above the reference mean. With a Z-score of 0.82 (79.3th percentile), this represents normal volume ; whole brain volume measures 1,189,930 mm³, 4.9% above the reference mean. With a Z-score of 0.69 (75.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,549 mm³, 6.7% above the reference mean. With a Z-score of 0.46 (67.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,537 mm³, 1.9% below the reference mean. With a Z-score of -0.16 (43.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 26,277 mm³, 17.2% above the reference mean. With a Z-score of 1.42 (92.2th percentile), this represents mild enlargement. ",
  "text_data": "Age is 63.8 years. Gender is Male. Education: 18 years. MMSE: 28.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Amyloid beta: 865.40 pg/mL (normal ); Total tau: 146.80 pg/mL (mild reduced); Phosphorylated tau: 12.92 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild ventricular enlargement but otherwise normal hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus volumes. Clinically, the patient has a normal MMSE score (28/30), normal Aβ levels, and mildly reduced tau biomarkers, which do not strongly suggest neurodegeneration.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular enlargement, but other markers are reassuring)",
  "timestamp": "2025-07-26T10:57:50.220798"
}