{
  "ptid_time": "007_S_0068_2008-12-02",
  "img_path": "/data/qiuhui/data/adni/images/007_S_0068/2008-12-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,286 mm³, 7.9% above the reference mean. With a Z-score of 0.18 (57.2th percentile), this represents normal volume ; hippocampal volume measures 7,239 mm³, 1.7% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; whole brain volume measures 924,839 mm³, 5.1% below the reference mean. With a Z-score of -0.64 (26.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,328 mm³, 9.4% below the reference mean. With a Z-score of -0.58 (28.2th percentile), this represents normal volume ; fusiform gyrus volume measures 15,579 mm³, 8.4% below the reference mean. With a Z-score of -0.77 (22.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,968 mm³, 14.6% above the reference mean. With a Z-score of 1.27 (89.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 77.4 years. Gender is Female. Education: 12 years. MMSE: 28.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements, including hippocampal and entorhinal cortex volumes, are within normal ranges (Z-scores close to 0, percentiles near 50th). The MMSE score of 28 is within the normal range (≥26), and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:44:17.708357"
}