{
  "ptid_time": "023_S_1190_2007-07-17",
  "img_path": "/data/qiuhui/data/adni/images/023_S_1190/2007-07-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,793 mm³, 25.9% below the reference mean. With a Z-score of -0.59 (27.6th percentile), this represents normal volume ; hippocampal volume measures 7,933 mm³, 11.5% above the reference mean. With a Z-score of 1.06 (85.4th percentile), this represents mild enlargement; whole brain volume measures 978,153 mm³, 0.4% above the reference mean. With a Z-score of 0.05 (51.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,100 mm³, 11.6% above the reference mean. With a Z-score of 0.71 (76.2th percentile), this represents normal volume ; fusiform gyrus volume measures 18,025 mm³, 5.9% above the reference mean. With a Z-score of 0.54 (70.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,550 mm³, 2.0% above the reference mean. With a Z-score of 0.17 (56.8th percentile), this represents normal volume . ",
  "text_data": "Age is 77.0 years. Gender is Female. Education: 13 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges or even slightly above the reference mean, particularly in the hippocampus and entorhinal cortex. The MMSE score of 30 is perfect, and the absence of APOE4 alleles further reduces Alzheimer's risk. There are no structural or cognitive indicators of impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T02:55:20.005366"
}