{
  "ptid_time": "011_S_0021_2006-11-02",
  "img_path": "/data/qiuhui/data/adni/images/011_S_0021/2006-11-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,771 mm³, 50.9% below the reference mean. With a Z-score of -1.17 (12.2th percentile), this represents mild atrophy; hippocampal volume measures 8,337 mm³, 17.2% above the reference mean. With a Z-score of 1.58 (94.2th percentile), this represents moderate enlargement; whole brain volume measures 986,093 mm³, 1.2% above the reference mean. With a Z-score of 0.15 (55.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,342 mm³, 9.0% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,733 mm³, 4.2% above the reference mean. With a Z-score of 0.39 (65.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,419 mm³, 9.1% below the reference mean. With a Z-score of -0.79 (21.4th percentile), this represents normal volume . ",
  "text_data": "Age is 73.6 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild ventricular atrophy but otherwise largely normal brain volumes, including a notably above-average hippocampal volume. The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor. No significant cognitive impairment is evident.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:39:41.543547"
}