{
  "ptid_time": "137_S_4631_2013-06-17",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4631/2013-06-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 30,629 mm³, 20.5% below the reference mean. With a Z-score of -0.49 (31.2th percentile), this represents normal volume ; hippocampal volume measures 8,038 mm³, 6.3% above the reference mean. With a Z-score of 0.62 (73.2th percentile), this represents normal volume ; whole brain volume measures 1,169,570 mm³, 8.4% above the reference mean. With a Z-score of 1.08 (86.1th percentile), this represents mild enlargement; entorhinal cortex volume measures 3,631 mm³, 11.5% below the reference mean. With a Z-score of -0.78 (21.9th percentile), this represents normal volume ; fusiform gyrus volume measures 21,062 mm³, 11.8% above the reference mean. With a Z-score of 1.01 (84.3th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,866 mm³, 11.8% above the reference mean. With a Z-score of 1.06 (85.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 70.5 years. Gender is Male. Education: 20 years. MMSE: 28.0. MoCA: 25.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or mildly enlarged volumes in most regions, including the hippocampus, which is typically affected in Alzheimer's. The entorhinal cortex is slightly below the mean but still within the normal range. Cognitive scores (MMSE 28, MoCA 25) are within normal limits for age, and the absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T16:39:19.038190"
}