{
  "ptid_time": "116_S_0657_2008-09-16",
  "img_path": "/data/qiuhui/data/adni/images/116_S_0657/2008-09-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,072 mm³, 46.3% above the reference mean. With a Z-score of 1.06 (85.6th percentile), this represents mild enlargement; hippocampal volume measures 6,609 mm³, 7.1% below the reference mean. With a Z-score of -0.65 (25.7th percentile), this represents normal volume ; whole brain volume measures 1,019,580 mm³, 4.6% above the reference mean. With a Z-score of 0.58 (71.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,063 mm³, 16.6% below the reference mean. With a Z-score of -1.02 (15.4th percentile), this represents mild atrophy; fusiform gyrus volume measures 16,403 mm³, 3.6% below the reference mean. With a Z-score of -0.33 (37.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,803 mm³, 19.0% above the reference mean. With a Z-score of 1.65 (95.0th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 79.7 years. Gender is Female. Education: 13 years. MMSE: 27.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild ventricular enlargement and mild entorhinal cortex atrophy, both of which are associated with early neurodegenerative changes. However, hippocampal volume is normal, and MMSE is within the normal range (27/30), suggesting no significant cognitive impairment. The absence of APOE4 also reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild structural changes but preserved cognition)",
  "timestamp": "2025-07-26T11:57:06.455283"
}