{
  "ptid_time": "131_S_0441_2009-05-14",
  "img_path": "/data/qiuhui/data/adni/images/131_S_0441/2009-05-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,846 mm³, 17.0% above the reference mean. With a Z-score of 0.39 (65.2th percentile), this represents normal volume ; hippocampal volume measures 6,778 mm³, 4.7% below the reference mean. With a Z-score of -0.43 (33.2th percentile), this represents normal volume ; whole brain volume measures 956,425 mm³, 1.9% below the reference mean. With a Z-score of -0.24 (40.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,471 mm³, 5.5% below the reference mean. With a Z-score of -0.34 (36.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,466 mm³, 2.7% above the reference mean. With a Z-score of 0.24 (59.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,647 mm³, 7.9% below the reference mean. With a Z-score of -0.69 (24.5th percentile), this represents normal volume . ",
  "text_data": "Age is 75.7 years. Gender is Female. Education: 16 years. MMSE: 30.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. ",
  "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. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:06:23.409522"
}