{
  "ptid_time": "099_S_0090_2006-08-03",
  "img_path": "/data/qiuhui/data/adni/images/099_S_0090/2006-08-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,387 mm³, 31.5% below the reference mean. With a Z-score of -0.75 (22.5th percentile), this represents normal volume ; hippocampal volume measures 7,526 mm³, 0.4% below the reference mean. With a Z-score of -0.04 (48.3th percentile), this represents normal volume ; whole brain volume measures 999,433 mm³, 7.4% below the reference mean. With a Z-score of -0.96 (16.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,306 mm³, 5.0% above the reference mean. With a Z-score of 0.34 (63.3th percentile), this represents normal volume ; fusiform gyrus volume measures 12,733 mm³, 32.4% below the reference mean. With a Z-score of -2.76 (0.3th percentile), this represents significant atrophy; middle temporal gyrus volume measures 20,071 mm³, 5.9% below the reference mean. With a Z-score of -0.53 (29.7th percentile), this represents normal volume . ",
  "text_data": "Age is 70.3 years. Gender is Male. Education: 20 years. MMSE: 30.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The fusiform gyrus shows significant atrophy (Z-score -2.76, 0.3rd percentile), which is concerning for neurodegenerative changes, but other key regions (hippocampus, entorhinal cortex) are within normal ranges. The MMSE score of 30 is intact, and while APOE4 homozygosity increases Alzheimer's risk, there is no clear cognitive impairment.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to isolated fusiform atrophy but preserved cognition and other structures)",
  "timestamp": "2025-07-26T10:52:45.293874"
}