{
  "ptid_time": "137_S_0283_2007-05-03",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0283/2007-05-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,679 mm³, 48.9% below the reference mean. With a Z-score of -1.17 (12.1th percentile), this represents mild atrophy; hippocampal volume measures 7,463 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.1th percentile), this represents normal volume ; whole brain volume measures 1,143,300 mm³, 5.9% above the reference mean. With a Z-score of 0.77 (77.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,327 mm³, 18.9% below the reference mean. With a Z-score of -1.28 (10.0th percentile), this represents mild atrophy; fusiform gyrus volume measures 18,675 mm³, 0.9% below the reference mean. With a Z-score of -0.07 (47.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,555 mm³, 1.0% above the reference mean. With a Z-score of 0.09 (53.6th percentile), this represents normal volume . ",
  "text_data": "Age is 79.4 years. Gender is Male. Education: 12 years. MMSE: 30.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild atrophy in the ventricular volume and entorhinal cortex, but hippocampal and whole brain volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions despite normal cognition)",
  "timestamp": "2025-07-26T16:07:45.528678"
}