{
  "ptid_time": "136_S_0186_2006-09-18",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0186/2006-09-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,292 mm³, 41.5% above the reference mean. With a Z-score of 1.12 (86.9th percentile), this represents mild enlargement; hippocampal volume measures 7,475 mm³, 15.1% above the reference mean. With a Z-score of 1.21 (88.7th percentile), this represents mild enlargement; whole brain volume measures 990,479 mm³, 6.7% above the reference mean. With a Z-score of 0.81 (79.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,652 mm³, 5.5% above the reference mean. With a Z-score of 0.30 (61.6th percentile), this represents normal volume ; fusiform gyrus volume measures 17,455 mm³, 8.4% above the reference mean. With a Z-score of 0.63 (73.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,468 mm³, 8.0% above the reference mean. With a Z-score of 0.71 (76.1th percentile), this represents normal volume . ",
  "text_data": "Age is 80.9 years. Gender is Female. Education: 16 years. MMSE: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mild enlargement in the ventricles and hippocampus, but all other regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. The MMSE score of 27 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": "2025-07-26T15:57:27.547475"
}