{
  "ptid_time": "133_S_0488_2009-06-08",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0488/2009-06-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,836 mm³, 47.1% below the reference mean. With a Z-score of -1.08 (14.0th percentile), this represents mild atrophy; hippocampal volume measures 8,858 mm³, 24.5% above the reference mean. With a Z-score of 2.25 (98.8th percentile), this represents significant enlargement; whole brain volume measures 1,060,820 mm³, 8.8% above the reference mean. With a Z-score of 1.11 (86.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,111 mm³, 11.9% above the reference mean. With a Z-score of 0.73 (76.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,450 mm³, 2.6% above the reference mean. With a Z-score of 0.23 (59.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,760 mm³, 2.1% below the reference mean. With a Z-score of -0.19 (42.6th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Female. Education: 16 years. MMSE: 27.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild ventricular atrophy but otherwise normal-to-above-normal volumes in key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 27 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular atrophy, but other markers and cognitive performance suggest normal aging)",
  "timestamp": "2025-07-26T15:17:15.523927"
}