{
  "ptid_time": "002_S_4213_2012-03-16",
  "img_path": "/data/qiuhui/data/adni/images/002_S_4213/2012-03-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,962 mm³, 21.0% above the reference mean. With a Z-score of 0.48 (68.5th percentile), this represents normal volume ; hippocampal volume measures 7,555 mm³, 6.2% above the reference mean. With a Z-score of 0.57 (71.5th percentile), this represents normal volume ; whole brain volume measures 987,291 mm³, 1.3% above the reference mean. With a Z-score of 0.16 (56.5th percentile), this represents normal volume ; entorhinal cortex volume measures 5,034 mm³, 37.1% above the reference mean. With a Z-score of 2.27 (98.9th percentile), this represents significant enlargement; fusiform gyrus volume measures 18,214 mm³, 7.1% above the reference mean. With a Z-score of 0.64 (74.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,808 mm³, 1.9% below the reference mean. With a Z-score of -0.16 (43.5th percentile), this represents normal volume . ",
  "text_data": "Age is 78.5 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 28.0. 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 above average, with no significant atrophy. The entorhinal cortex shows significant enlargement, which is atypical for Alzheimer's but not indicative of neurodegeneration. Cognitive scores (MMSE 30, MoCA 28) are excellent, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:20:59.415861"
}