{
  "ptid_time": "133_S_0771_2008-10-14",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0771/2008-10-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,734 mm³, 30.9% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; hippocampal volume measures 6,448 mm³, 9.4% below the reference mean. With a Z-score of -0.86 (19.5th percentile), this represents normal volume ; whole brain volume measures 977,283 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,393 mm³, 7.6% below the reference mean. With a Z-score of -0.47 (32.0th percentile), this represents normal volume ; fusiform gyrus volume measures 16,529 mm³, 2.8% below the reference mean. With a Z-score of -0.26 (39.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,812 mm³, 1.9% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume . ",
  "text_data": "Age is 76.1 years. Gender is Female. Education: 19 years. MMSE: 30.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (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 reduces genetic risk for Alzheimer's.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:26:23.154768"
}