{
  "ptid_time": "128_S_0770_2007-08-08",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0770/2007-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 37,871 mm³, 1.7% below the reference mean. With a Z-score of -0.04 (48.4th percentile), this represents normal volume ; hippocampal volume measures 8,196 mm³, 8.4% above the reference mean. With a Z-score of 0.82 (79.4th percentile), this represents normal volume ; whole brain volume measures 993,095 mm³, 8.0% below the reference mean. With a Z-score of -1.04 (15.0th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,849 mm³, 6.1% below the reference mean. With a Z-score of -0.42 (33.9th percentile), this represents normal volume ; fusiform gyrus volume measures 19,513 mm³, 3.6% above the reference mean. With a Z-score of 0.31 (62.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,580 mm³, 1.1% above the reference mean. With a Z-score of 0.10 (54.0th percentile), this represents normal volume . ",
  "text_data": "Age is 72.2 years. Gender is Male. Education: 19 years. MMSE: 29.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild whole-brain atrophy (15th percentile) but otherwise normal volumes in key regions like the hippocampus (79th percentile) and entorhinal cortex (33.9th percentile). The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles reduces genetic risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild whole-brain atrophy could warrant monitoring, but no other significant abnormalities support cognitive impairment)",
  "timestamp": "2025-07-26T13:49:47.174043"
}