{
  "ptid_time": "002_S_0413_2006-11-15",
  "img_path": "/data/qiuhui/data/adni/images/002_S_0413/2006-11-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,245 mm³, 0.6% above the reference mean. With a Z-score of 0.01 (50.6th percentile), this represents normal volume ; hippocampal volume measures 6,888 mm³, 3.2% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume ; whole brain volume measures 1,064,560 mm³, 9.2% above the reference mean. With a Z-score of 1.16 (87.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,150 mm³, 13.0% above the reference mean. With a Z-score of 0.80 (78.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,346 mm³, 13.7% above the reference mean. With a Z-score of 1.25 (89.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 20,430 mm³, 6.6% above the reference mean. With a Z-score of 0.57 (71.6th percentile), this represents normal volume . ",
  "text_data": "Age is 76.8 years. Gender is Female. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or mildly enlarged structures, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:00:54.212424"
}