{
  "ptid_time": "005_S_0553_2008-08-21",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0553/2008-08-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,909 mm³, 17.2% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; hippocampal volume measures 7,457 mm³, 7.0% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; whole brain volume measures 1,008,350 mm³, 2.0% below the reference mean. With a Z-score of -0.26 (39.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,792 mm³, 4.5% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume ; fusiform gyrus volume measures 15,360 mm³, 15.0% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,424 mm³, 6.2% above the reference mean. With a Z-score of 0.56 (71.1th percentile), this represents normal volume . ",
  "text_data": "Age is 86.6 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 22.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) are within normal ranges except for mild atrophy in the fusiform gyrus (Z-score -1.30, 9.7th percentile). The MMSE score of 30 is intact, and there is no APOE4 genetic risk factor.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:10:00.963594"
}