{
  "ptid_time": "027_S_1045_2007-05-25",
  "img_path": "/data/qiuhui/data/adni/images/027_S_1045/2007-05-25/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,869 mm³, 13.8% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; hippocampal volume measures 5,528 mm³, 14.9% below the reference mean. With a Z-score of -1.19 (11.6th percentile), this represents mild atrophy; whole brain volume measures 941,566 mm³, 1.4% above the reference mean. With a Z-score of 0.17 (56.9th percentile), this represents normal volume ; entorhinal cortex volume measures 2,427 mm³, 29.9% below the reference mean. With a Z-score of -1.61 (5.3th percentile), this represents moderate atrophy; fusiform gyrus volume measures 16,350 mm³, 1.5% above the reference mean. With a Z-score of 0.11 (54.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,831 mm³, 6.6% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume . ",
  "text_data": "Age is 83.1 years. Gender is Female. Education: 14 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and entorhinal cortex volumes show mild to moderate atrophy (Z-scores -1.19 and -1.61, respectively), which are key regions affected in Alzheimer's disease. However, the MMSE score of 28 is within the normal range, and other brain volumes (ventricular, whole brain, fusiform gyrus, middle temporal gyrus) are normal. The absence of APOE4 alleles and preserved cognitive function suggest no significant impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to structural changes in memory-related regions but intact cognition)",
  "timestamp": "2025-07-26T03:44:07.350925"
}