{
  "ptid_time": "005_S_0448_2006-12-08",
  "img_path": "/data/qiuhui/data/adni/images/005_S_0448/2006-12-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 71,103 mm³, 51.2% above the reference mean. With a Z-score of 1.49 (93.2th percentile), this represents mild enlargement; hippocampal volume measures 6,252 mm³, 10.3% below the reference mean. With a Z-score of -0.89 (18.7th percentile), this represents normal volume ; whole brain volume measures 1,065,060 mm³, 3.5% above the reference mean. With a Z-score of 0.46 (67.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,664 mm³, 7.7% below the reference mean. With a Z-score of -0.50 (30.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,670 mm³, 7.7% below the reference mean. With a Z-score of -0.67 (25.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,515 mm³, 1.7% above the reference mean. With a Z-score of 0.15 (56.1th percentile), this represents normal volume . ",
  "text_data": "Age is 86.0 years. Gender is Male. Education: 17 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular enlargement (51.2% above mean, Z-score 1.49) but otherwise normal brain volumes, including hippocampal volume (Z-score -0.89). The MMSE score of 26 is borderline but within normal limits for age, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular enlargement but otherwise normal findings)",
  "timestamp": "2025-07-25T21:06:40.031840"
}