{
  "ptid_time": "141_S_0810_2007-11-24",
  "img_path": "/data/qiuhui/data/adni/images/141_S_0810/2007-11-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,588 mm³, 14.0% above the reference mean. With a Z-score of 0.41 (65.8th percentile), this represents normal volume ; hippocampal volume measures 7,206 mm³, 3.4% above the reference mean. With a Z-score of 0.29 (61.6th percentile), this represents normal volume ; whole brain volume measures 970,564 mm³, 5.7% below the reference mean. With a Z-score of -0.75 (22.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,514 mm³, 13.7% above the reference mean. With a Z-score of 0.90 (81.6th percentile), this represents normal volume ; fusiform gyrus volume measures 14,204 mm³, 21.4% below the reference mean. With a Z-score of -1.85 (3.2th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 19,475 mm³, 3.5% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume . ",
  "text_data": "Age is 84.3 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows moderate atrophy in the fusiform gyrus (Z-score -1.85, 3.2nd percentile), but all other regions (hippocampus, entorhinal cortex, whole brain, etc.) are within normal ranges. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 alleles reduces genetic risk for Alzheimer’s.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to fusiform gyrus atrophy, but no clinical symptoms or other structural deficits)",
  "timestamp": "2025-07-26T16:49:58.690019"
}