{
  "ptid_time": "072_S_0315_2009-05-08",
  "img_path": "/data/qiuhui/data/adni/images/072_S_0315/2009-05-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,707 mm³, 20.3% below the reference mean. With a Z-score of -0.49 (31.4th percentile), this represents normal volume ; hippocampal volume measures 8,303 mm³, 9.8% above the reference mean. With a Z-score of 0.96 (83.1th percentile), this represents normal volume ; whole brain volume measures 1,146,020 mm³, 6.2% above the reference mean. With a Z-score of 0.80 (78.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,996 mm³, 2.6% below the reference mean. With a Z-score of -0.17 (43.1th percentile), this represents normal volume ; fusiform gyrus volume measures 15,979 mm³, 15.2% below the reference mean. With a Z-score of -1.29 (9.8th percentile), this represents mild atrophy; middle temporal gyrus volume measures 20,368 mm³, 4.6% below the reference mean. With a Z-score of -0.41 (34.1th percentile), this represents normal volume . ",
  "text_data": "Age is 74.5 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, and middle temporal gyrus) are within normal ranges except for the fusiform gyrus, which shows mild atrophy. The MMSE score of 30/30 is optimal, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T09:07:25.829924"
}