{
  "ptid_time": "094_S_1241_2007-08-23",
  "img_path": "/data/qiuhui/data/adni/images/094_S_1241/2007-08-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,025 mm³, 16.9% below the reference mean. With a Z-score of -0.40 (34.3th percentile), this represents normal volume ; hippocampal volume measures 7,196 mm³, 4.8% below the reference mean. With a Z-score of -0.47 (32.0th percentile), this represents normal volume ; whole brain volume measures 1,105,900 mm³, 2.5% above the reference mean. With a Z-score of 0.32 (62.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,312 mm³, 5.2% above the reference mean. With a Z-score of 0.35 (63.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,034 mm³, 14.9% below the reference mean. With a Z-score of -1.27 (10.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 20,026 mm³, 6.2% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume . ",
  "text_data": "Age is 72.6 years. Gender is Male. Education: 20 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mostly normal measurements, with only mild atrophy in the fusiform gyrus (Z-score -1.27, 10.2th percentile). The hippocampal volume is within normal limits (Z-score -0.47), and the MMSE score of 29 is intact. No APOE4 alleles further reduce Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild fusiform atrophy could warrant monitoring, but no significant cognitive or biomarker evidence of impairment)",
  "timestamp": "2025-07-26T10:17:12.670901"
}