{
  "ptid_time": "128_S_0138_2006-08-31",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0138/2006-08-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 59,295 mm³, 26.1% above the reference mean. With a Z-score of 0.76 (77.6th percentile), this represents normal volume ; hippocampal volume measures 6,488 mm³, 6.9% below the reference mean. With a Z-score of -0.60 (27.6th percentile), this represents normal volume ; whole brain volume measures 994,200 mm³, 3.4% below the reference mean. With a Z-score of -0.45 (32.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,220 mm³, 18.9% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy; fusiform gyrus volume measures 17,225 mm³, 4.7% below the reference mean. With a Z-score of -0.40 (34.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,012 mm³, 0.8% below the reference mean. With a Z-score of -0.07 (47.2th percentile), this represents normal volume . ",
  "text_data": "Age is 86.8 years. Gender is Male. Education: 15 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and whole brain volumes are within normal limits, but the entorhinal cortex shows mild atrophy (Z-score -1.24, 10.8th percentile). However, cognitive performance (MMSE: 30) is intact, and there are no other significant structural abnormalities. APOE4-negative status further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild entorhinal atrophy despite normal cognition)",
  "timestamp": "2025-07-26T13:34:32.179664"
}