{
  "ptid_time": "023_S_0058_2008-12-09",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0058/2008-12-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,190 mm³, 32.0% below the reference mean. With a Z-score of -0.77 (22.2th percentile), this represents normal volume ; hippocampal volume measures 7,663 mm³, 1.4% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume ; whole brain volume measures 982,501 mm³, 9.0% below the reference mean. With a Z-score of -1.17 (12.2th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,586 mm³, 12.5% below the reference mean. With a Z-score of -0.85 (19.7th percentile), this represents normal volume ; fusiform gyrus volume measures 18,019 mm³, 4.3% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,775 mm³, 2.6% below the reference mean. With a Z-score of -0.24 (40.6th percentile), this represents normal volume . ",
  "text_data": "Age is 73.1 years. Gender is Male. Education: 16 years. MMSE: 29.0. Logical Memory: 14.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy (Z-score -1.17, 12.2th percentile), but hippocampal, entorhinal cortex, and other key regions are within normal ranges. The MMSE score of 29 is normal, and there are no significant structural deficits in Alzheimer’s-related regions.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild whole-brain atrophy could warrant monitoring, but no clear cognitive or biomarker evidence of impairment)",
  "timestamp": "2025-07-26T02:30:13.854050"
}