{
  "ptid_time": "010_S_0904_2008-06-27",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0904/2008-06-27/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 63,019 mm³, 34.0% above the reference mean. With a Z-score of 0.99 (83.9th percentile), this represents normal volume ; hippocampal volume measures 7,193 mm³, 3.2% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume ; whole brain volume measures 1,106,600 mm³, 7.5% above the reference mean. With a Z-score of 0.99 (83.8th percentile), this represents normal volume ; entorhinal cortex volume measures 2,975 mm³, 25.0% below the reference mean. With a Z-score of -1.64 (5.1th percentile), this represents moderate atrophy; fusiform gyrus volume measures 19,888 mm³, 10.1% above the reference mean. With a Z-score of 0.87 (80.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,195 mm³, 0.1% above the reference mean. With a Z-score of 0.01 (50.4th percentile), this represents normal volume . ",
  "text_data": "Age is 85.6 years. Gender is Male. Education: 16 years. MMSE: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The entorhinal cortex shows moderate atrophy (25% below reference mean, Z-score -1.64), which is a key early marker for Alzheimer's pathology. However, hippocampal and whole brain volumes are normal, and MMSE (26/30) is only mildly impaired, suggesting preserved global cognition. The absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Entorhinal atrophy is concerning, but other structures and cognitive scores are relatively preserved, making dementia less likely at this stage.)",
  "timestamp": "2025-07-25T22:34:35.309167"
}