{
  "ptid_time": "057_S_0818_2009-09-30",
  "img_path": "/data/qiuhui/data/adni/images/057_S_0818/2009-09-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,725 mm³, 54.7% below the reference mean. With a Z-score of -1.25 (10.5th percentile), this represents mild atrophy; hippocampal volume measures 7,972 mm³, 12.1% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement; whole brain volume measures 951,806 mm³, 2.3% below the reference mean. With a Z-score of -0.30 (38.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,475 mm³, 5.4% below the reference mean. With a Z-score of -0.33 (37.0th percentile), this represents normal volume ; fusiform gyrus volume measures 15,778 mm³, 7.3% below the reference mean. With a Z-score of -0.66 (25.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,078 mm³, 4.7% above the reference mean. With a Z-score of 0.41 (66.0th percentile), this represents normal volume . ",
  "text_data": "Age is 77.0 years. Gender is Female. Education: 10 years. MMSE: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal or even slightly enlarged hippocampal volume, with no significant atrophy in other key regions. The MMSE score of 30 is intact, and the absence of APOE4 alleles reduces genetic risk. There are no clear structural or cognitive deficits suggestive of neurodegeneration.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T08:05:17.995864"
}