{
  "ptid_time": "005_S_0602_2007-08-08",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0602/2007-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,607 mm³, 49.1% below the reference mean. With a Z-score of -1.18 (12.0th percentile), this represents mild atrophy; hippocampal volume measures 7,900 mm³, 4.5% above the reference mean. With a Z-score of 0.44 (67.0th percentile), this represents normal volume ; whole brain volume measures 1,084,350 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,349 mm³, 6.1% above the reference mean. With a Z-score of 0.41 (65.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,014 mm³, 0.9% above the reference mean. With a Z-score of 0.08 (53.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,053 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.2th percentile), this represents normal volume . ",
  "text_data": "Age is 71.7 years. Gender is Male. Education: 17 years. MMSE: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1381.00 pg/mL (normal ); Total tau: 206.00 pg/mL (normal ); Phosphorylated tau: 19.40 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Biomarkers (Aβ, T-tau, P-tau) are normal, and cognitive performance (MMSE 30) is intact. No APOE4 risk allele is present.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:12:58.567438"
}