{
  "ptid_time": "010_S_0420_2009-08-25",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0420/2009-08-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,016 mm³, 45.4% below the reference mean. With a Z-score of -1.09 (13.8th percentile), this represents mild atrophy; hippocampal volume measures 7,214 mm³, 4.6% below the reference mean. With a Z-score of -0.45 (32.8th percentile), this represents normal volume ; whole brain volume measures 1,031,240 mm³, 4.5% below the reference mean. With a Z-score of -0.58 (28.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,107 mm³, 0.2% above the reference mean. With a Z-score of 0.01 (50.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,903 mm³, 5.7% above the reference mean. With a Z-score of 0.48 (68.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,018 mm³, 3.2% above the reference mean. With a Z-score of 0.29 (61.3th percentile), this represents normal volume . ",
  "text_data": "Age is 76.4 years. Gender is Male. Education: 19 years. MMSE: 30.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.20 SUVR (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (mild atrophy) but otherwise normal volumes in key regions such as the hippocampus, entorhinal cortex, and temporal structures. The MMSE score of 30/30 is intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:31:13.318198"
}