{
  "ptid_time": "123_S_0072_2006-07-19",
  "img_path": "/data/qiuhui/data/adni/images/123_S_0072/2006-07-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,461 mm³, 26.1% below the reference mean. With a Z-score of -0.63 (26.6th percentile), this represents normal volume ; hippocampal volume measures 7,998 mm³, 5.8% above the reference mean. With a Z-score of 0.57 (71.4th percentile), this represents normal volume ; whole brain volume measures 1,072,980 mm³, 0.6% below the reference mean. With a Z-score of -0.08 (46.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,784 mm³, 16.7% above the reference mean. With a Z-score of 1.13 (87.1th percentile), this represents mild enlargement; fusiform gyrus volume measures 20,352 mm³, 8.0% above the reference mean. With a Z-score of 0.68 (75.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,214 mm³, 8.8% above the reference mean. With a Z-score of 0.79 (78.5th percentile), this represents normal volume . ",
  "text_data": "Age is 71.1 years. Gender is Male. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, fusiform gyrus, middle temporal gyrus) are within normal ranges or even slightly above average. The entorhinal cortex shows mild enlargement, which is atypical for Alzheimer's but not indicative of pathology. The MMSE score of 29 is within the normal range, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:21:30.260080"
}