{
  "ptid_time": "100_S_0069_2007-01-09",
  "img_path": "/data/qiuhui/data/adni/images/100_S_0069/2007-01-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,054 mm³, 14.2% below the reference mean. With a Z-score of -0.34 (36.7th percentile), this represents normal volume ; hippocampal volume measures 8,099 mm³, 7.1% above the reference mean. With a Z-score of 0.70 (75.7th percentile), this represents normal volume ; whole brain volume measures 1,189,350 mm³, 10.2% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,121 mm³, 0.5% above the reference mean. With a Z-score of 0.03 (51.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,185 mm³, 1.8% above the reference mean. With a Z-score of 0.16 (56.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,742 mm³, 11.3% above the reference mean. With a Z-score of 1.01 (84.4th percentile), this represents mild enlargement. ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within or above the normal reference range, with no significant atrophy. The MMSE score of 30/30 indicates intact cognitive function, and the absence of APOE4 further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:16:07.954058"
}