{
  "ptid_time": "002_S_0295_2008-07-23",
  "img_path": "/data/qiuhui/data/adni/images/002_S_0295/2008-07-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,423 mm³, 9.8% below the reference mean. With a Z-score of -0.28 (38.8th percentile), this represents normal volume ; hippocampal volume measures 6,839 mm³, 1.9% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume ; whole brain volume measures 1,067,480 mm³, 3.7% above the reference mean. With a Z-score of 0.49 (68.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,855 mm³, 2.9% below the reference mean. With a Z-score of -0.19 (42.5th percentile), this represents normal volume ; fusiform gyrus volume measures 18,159 mm³, 0.5% above the reference mean. With a Z-score of 0.04 (51.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,269 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 86.8 years. Gender is Male. Education: 18 years. MMSE: 29.0. Logical Memory: 10.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges (Z-scores close to 0, percentiles near 50th). The MMSE score of 29 is within the normal range (≥26), and while APOE4 is a risk factor, there is no structural or cognitive evidence of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T19:59:57.723608"
}