{
  "ptid_time": "036_S_0813_2009-10-09",
  "img_path": "/data/qiuhui/data/adni/images/036_S_0813/2009-10-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,809 mm³, 30.4% below the reference mean. With a Z-score of -0.73 (23.3th percentile), this represents normal volume ; hippocampal volume measures 7,648 mm³, 1.2% above the reference mean. With a Z-score of 0.11 (54.6th percentile), this represents normal volume ; whole brain volume measures 1,036,320 mm³, 4.0% below the reference mean. With a Z-score of -0.52 (30.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,204 mm³, 21.9% below the reference mean. With a Z-score of -1.48 (6.9th percentile), this represents mild atrophy; fusiform gyrus volume measures 14,139 mm³, 24.9% below the reference mean. With a Z-score of -2.12 (1.7th percentile), this represents significant atrophy; middle temporal gyrus volume measures 22,535 mm³, 5.6% above the reference mean. With a Z-score of 0.50 (69.3th percentile), this represents normal volume . ",
  "text_data": "Age is 75.7 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 10.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows normal volumes in most brain regions (ventricular, hippocampal, whole brain, and middle temporal gyrus), but significant atrophy in the fusiform gyrus and mild atrophy in the entorhinal cortex. Despite these findings, cognitive performance (MMSE = 30) is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Atrophy in fusiform gyrus and entorhinal cortex is concerning, but preserved cognition and lack of APOE4 suggest no current impairment.)",
  "timestamp": "2025-07-26T06:05:53.223295"
}