{
  "ptid_time": "130_S_0969_2007-11-07",
  "img_path": "/data/qiuhui/data/adni/images/130_S_0969/2007-11-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,219 mm³, 18.9% below the reference mean. With a Z-score of -0.45 (32.5th percentile), this represents normal volume ; hippocampal volume measures 6,568 mm³, 13.1% below the reference mean. With a Z-score of -1.28 (10.0th percentile), this represents mild atrophy; whole brain volume measures 1,060,980 mm³, 1.7% below the reference mean. With a Z-score of -0.22 (41.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,853 mm³, 6.0% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,387 mm³, 7.7% below the reference mean. With a Z-score of -0.66 (25.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,383 mm³, 4.5% below the reference mean. With a Z-score of -0.40 (34.4th percentile), this represents normal volume . ",
  "text_data": "Age is 71.0 years. Gender is Male. Education: 18 years. Handedness: Unknown. Race: Unknown. MMSE: 30.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.28, 10th percentile), which is a key biomarker for Alzheimer’s disease, but all other brain volumes are within normal ranges. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to isolated hippocampal atrophy but otherwise normal cognitive and structural findings)",
  "timestamp": "2025-07-26T14:33:20.474443"
}