{
  "ptid_time": "133_S_0493_2006-12-04",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0493/2006-12-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 58,863 mm³, 52.8% above the reference mean. With a Z-score of 1.27 (89.7th percentile), this represents mild enlargement; hippocampal volume measures 7,914 mm³, 4.7% above the reference mean. With a Z-score of 0.46 (67.7th percentile), this represents normal volume ; whole brain volume measures 1,076,420 mm³, 0.3% below the reference mean. With a Z-score of -0.04 (48.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,247 mm³, 3.6% above the reference mean. With a Z-score of 0.24 (59.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,470 mm³, 7.3% below the reference mean. With a Z-score of -0.62 (26.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,122 mm³, 3.7% above the reference mean. With a Z-score of 0.33 (62.9th percentile), this represents normal volume . ",
  "text_data": "Age is 78.0 years. Gender is Male. Education: 20 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.27), which can be associated with aging or early neurodegenerative changes, but hippocampal, whole brain, and other regional volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement warrants monitoring, but no other significant structural or cognitive deficits are present)",
  "timestamp": "2025-07-26T15:19:16.666951"
}