{
  "ptid_time": "116_S_4483_2018-04-06",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4483/2018-04-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,698 mm³, 48.6% above the reference mean. With a Z-score of 1.11 (86.7th percentile), this represents mild enlargement; hippocampal volume measures 7,328 mm³, 3.0% above the reference mean. With a Z-score of 0.28 (60.8th percentile), this represents normal volume ; whole brain volume measures 966,551 mm³, 0.8% below the reference mean. With a Z-score of -0.10 (45.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,271 mm³, 16.3% above the reference mean. With a Z-score of 1.00 (84.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,624 mm³, 3.6% above the reference mean. With a Z-score of 0.33 (62.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,464 mm³, 3.7% below the reference mean. With a Z-score of -0.32 (37.5th percentile), this represents normal volume . ",
  "text_data": "Age is 75.5 years. Gender is Female. Education: 15 years. MoCA: 28.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.97 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (48.6% above reference mean, Z-score 1.11), which can be associated with age-related atrophy but is not severe. All other brain volumes, including hippocampal, entorhinal cortex, and temporal regions, are within normal ranges. The MoCA score of 28/30 indicates no significant cognitive impairment, and the absence of APOE4 and normal AV45 (amyloid PET) further reduce the likelihood of Alzheimer’s pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T12:12:32.491517"
}