{
  "ptid_time": "127_S_0112_2007-02-05",
  "img_path": "/data/qiuhui/data/adni/images/127_S_0112/2007-02-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,386 mm³, 23.0% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; hippocampal volume measures 8,049 mm³, 6.5% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; whole brain volume measures 1,140,550 mm³, 5.7% above the reference mean. With a Z-score of 0.74 (76.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,181 mm³, 2.0% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume ; fusiform gyrus volume measures 20,784 mm³, 10.3% above the reference mean. With a Z-score of 0.88 (81.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,311 mm³, 13.9% above the reference mean. With a Z-score of 1.25 (89.5th percentile), this represents mild enlargement. ",
  "text_data": "Age is 71.6 years. Gender is Male. Education: 18 years. MMSE: 28.0. Logical Memory: 6.0. APOEε4 alleles: 1.0. Biomarker levels: Amyloid beta: 464.40 pg/mL (mild reduced); Total tau: 253.70 pg/mL (normal ); Phosphorylated tau: 26.55 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. MMSE score of 28 is within normal limits, and CSF biomarkers (Aβ mildly reduced, T-tau and P-tau normal) do not strongly support Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mildly reduced Aβ, but no structural or cognitive deficits)",
  "timestamp": "2025-07-26T12:54:46.379840"
}