{
  "ptid_time": "941_S_4292_2012-06-20",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4292/2012-06-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,491 mm³, 36.4% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume ; hippocampal volume measures 7,665 mm³, 1.4% above the reference mean. With a Z-score of 0.14 (55.4th percentile), this represents normal volume ; whole brain volume measures 1,034,330 mm³, 4.2% below the reference mean. With a Z-score of -0.54 (29.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,768 mm³, 8.1% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,299 mm³, 8.2% below the reference mean. With a Z-score of -0.70 (24.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,116 mm³, 5.7% below the reference mean. With a Z-score of -0.52 (30.3th percentile), this represents normal volume . ",
  "text_data": "Age is 71.4 years. Gender is Male. Education: 15 years. MMSE: 27.0. MoCA: 25.0. APOEε4 alleles: 0.0. ",
  "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 between -0.87 and 0.14). Cognitive scores (MMSE 27, MoCA 25) are within normal limits for age, and the absence of APOE4 reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T17:37:24.802094"
}