{
  "ptid_time": "052_S_1251_2007-08-31",
  "img_path": "/data/qiuhui/data/adni/images/052_S_1251/2007-08-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,433 mm³, 34.3% below the reference mean. With a Z-score of -0.79 (21.6th percentile), this represents normal volume ; hippocampal volume measures 7,891 mm³, 10.9% above the reference mean. With a Z-score of 1.00 (84.2th percentile), this represents mild enlargement; whole brain volume measures 997,651 mm³, 2.4% above the reference mean. With a Z-score of 0.30 (61.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,094 mm³, 11.5% above the reference mean. With a Z-score of 0.70 (75.9th percentile), this represents normal volume ; fusiform gyrus volume measures 16,992 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,196 mm³, 10.6% above the reference mean. With a Z-score of 0.92 (82.1th percentile), this represents normal volume . ",
  "text_data": "Age is 74.7 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 all within normal ranges or even slightly above average, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:45:29.428683"
}