{
  "ptid_time": "116_S_4855_2013-02-19",
  "img_path": "/data/qiuhui/data/adni/images/116_S_4855/2013-02-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,269 mm³, 14.4% below the reference mean. With a Z-score of -0.42 (33.8th percentile), this represents normal volume ; hippocampal volume measures 6,670 mm³, 4.3% below the reference mean. With a Z-score of -0.37 (35.6th percentile), this represents normal volume ; whole brain volume measures 1,023,800 mm³, 0.5% below the reference mean. With a Z-score of -0.07 (47.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,069 mm³, 2.5% above the reference mean. With a Z-score of 0.16 (56.5th percentile), this represents normal volume ; fusiform gyrus volume measures 16,935 mm³, 6.3% below the reference mean. With a Z-score of -0.54 (29.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,465 mm³, 8.5% below the reference mean. With a Z-score of -0.76 (22.4th percentile), this represents normal volume . ",
  "text_data": "Age is 84.3 years. Gender is Male. Education: 14 years. MMSE: 28.0. MoCA: 25.0. APOEε4 alleles: 1.0. ",
  "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 based on Z-scores and percentiles. Cognitive scores (MMSE: 28, MoCA: 25) are within normal limits for age, though the MoCA is slightly lower, which is common in older adults. APOE4 carrier status increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to slightly lower MoCA and APOE4 status, but no structural or significant cognitive deficits)",
  "timestamp": "2025-07-26T12:16:31.202875"
}