{
  "ptid_time": "128_S_0545_2009-06-17",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0545/2009-06-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,270 mm³, 21.4% below the reference mean. With a Z-score of -0.51 (30.4th percentile), this represents normal volume ; hippocampal volume measures 7,595 mm³, 0.5% above the reference mean. With a Z-score of 0.05 (51.8th percentile), this represents normal volume ; whole brain volume measures 1,148,380 mm³, 6.4% above the reference mean. With a Z-score of 0.83 (79.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,729 mm³, 9.1% below the reference mean. With a Z-score of -0.61 (26.9th percentile), this represents normal volume ; fusiform gyrus volume measures 20,431 mm³, 8.5% above the reference mean. With a Z-score of 0.72 (76.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,130 mm³, 15.0% below the reference mean. With a Z-score of -1.35 (8.8th percentile), this represents mild atrophy. ",
  "text_data": "Age is 74.8 years. Gender is Male. Education: 19 years. MMSE: 30.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the middle temporal gyrus. The MMSE score of 30 is intact, and there are no genetic risk factors (APOE4 negative). No significant cognitive impairment is indicated.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T13:47:00.900715"
}