{
  "ptid_time": "051_S_1072_2008-07-10",
  "img_path": "/data/qiuhui/data/adni/images/051_S_1072/2008-07-10/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 13,321 mm³, 40.4% below the reference mean. With a Z-score of -1.01 (15.6th percentile), this represents mild atrophy; hippocampal volume measures 8,642 mm³, 12.5% above the reference mean. With a Z-score of 1.40 (91.9th percentile), this represents mild enlargement; whole brain volume measures 1,081,820 mm³, 5.1% above the reference mean. With a Z-score of 0.64 (73.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,167 mm³, 7.0% above the reference mean. With a Z-score of 0.55 (70.7th percentile), this represents normal volume ; fusiform gyrus volume measures 20,124 mm³, 10.5% above the reference mean. With a Z-score of 1.18 (88.2th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,191 mm³, 13.0% above the reference mean. With a Z-score of 1.16 (87.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 61.3 years. Gender is Female. Education: 13 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular atrophy but otherwise normal-to-above-average volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). The MMSE score of 26 is borderline but within normal limits for age, and the absence of APOE4 reduces genetic risk. No significant atrophy in Alzheimer’s-vulnerable regions is observed.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular atrophy, but other markers are reassuring)",
  "timestamp": "2025-07-26T07:31:53.261138"
}