{
  "ptid_time": "133_S_0912_2008-11-06",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0912/2008-11-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,476 mm³, 27.0% below the reference mean. With a Z-score of -0.62 (26.8th percentile), this represents normal volume ; hippocampal volume measures 6,685 mm³, 6.0% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume ; whole brain volume measures 951,582 mm³, 2.4% below the reference mean. With a Z-score of -0.30 (38.3th percentile), this represents normal volume ; entorhinal cortex volume measures 2,771 mm³, 24.6% below the reference mean. With a Z-score of -1.51 (6.6th percentile), this represents moderate atrophy; fusiform gyrus volume measures 15,885 mm³, 6.6% below the reference mean. With a Z-score of -0.60 (27.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,358 mm³, 9.4% below the reference mean. With a Z-score of -0.82 (20.6th percentile), this represents normal volume . ",
  "text_data": "Age is 75.9 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex shows moderate atrophy (Z-score -1.51, 6.6th percentile), which is a key early marker for Alzheimer's pathology. However, hippocampal and whole brain volumes are within normal ranges, and the MMSE score of 30 indicates intact cognitive function.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to the isolated entorhinal cortex atrophy, but no other significant structural or cognitive deficits)",
  "timestamp": "2025-07-26T15:28:05.863057"
}