{
  "ptid_time": "141_S_0717_2008-09-19",
  "img_path": "/data/qiuhui/data/adni/images/141_S_0717/2008-09-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,992 mm³, 1.4% below the reference mean. With a Z-score of -0.03 (48.7th percentile), this represents normal volume ; hippocampal volume measures 8,646 mm³, 14.4% above the reference mean. With a Z-score of 1.40 (92.0th percentile), this represents mild enlargement; whole brain volume measures 1,171,340 mm³, 8.5% above the reference mean. With a Z-score of 1.11 (86.6th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,951 mm³, 3.6% below the reference mean. With a Z-score of -0.25 (40.2th percentile), this represents normal volume ; fusiform gyrus volume measures 19,899 mm³, 5.6% above the reference mean. With a Z-score of 0.48 (68.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,457 mm³, 0.6% above the reference mean. With a Z-score of 0.05 (52.0th percentile), this represents normal volume . ",
  "text_data": "Age is 78.0 years. Gender is Male. Education: 12 years. MMSE: 30.0. Logical Memory: 11.0. 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 30/30 and absence of APOE4 further support normal cognitive function.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:47:11.902160"
}