{
  "ptid_time": "082_S_2121_2019-05-16",
  "img_path": "/data/qiuhui/data/adni/images/082_S_2121/2019-05-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,494 mm³, 26.5% above the reference mean. With a Z-score of 0.61 (72.8th percentile), this represents normal volume ; hippocampal volume measures 6,332 mm³, 11.0% below the reference mean. With a Z-score of -1.01 (15.7th percentile), this represents mild atrophy; whole brain volume measures 1,049,750 mm³, 7.7% above the reference mean. With a Z-score of 0.97 (83.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,570 mm³, 2.8% below the reference mean. With a Z-score of -0.17 (43.2th percentile), this represents normal volume ; fusiform gyrus volume measures 20,323 mm³, 19.5% above the reference mean. With a Z-score of 1.77 (96.2th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 20,943 mm³, 9.3% above the reference mean. With a Z-score of 0.80 (78.9th percentile), this represents normal volume . ",
  "text_data": "Age is 76.3 years. Gender is Female. Education: 14 years. MMSE: 28.0. MoCA: 22.0. Logical Memory: 15.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.01, 15.7th percentile), which is a key biomarker for Alzheimer's disease, while other brain regions are largely normal or even enlarged. The MoCA score of 22 suggests mild cognitive impairment (MCI), while the MMSE of 28 is borderline normal, indicating possible early cognitive decline. The presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to the hippocampal atrophy and MoCA score, but MMSE is near-normal and some brain regions show no atrophy)",
  "timestamp": "2025-07-26T10:04:01.210538"
}