{
  "ptid_time": "137_S_4536_2018-11-07",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4536/2018-11-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,892 mm³, 24.2% above the reference mean. With a Z-score of 0.65 (74.3th percentile), this represents normal volume ; hippocampal volume measures 5,319 mm³, 18.1% below the reference mean. With a Z-score of -1.45 (7.3th percentile), this represents mild atrophy; whole brain volume measures 954,731 mm³, 2.9% above the reference mean. With a Z-score of 0.34 (63.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,222 mm³, 6.9% below the reference mean. With a Z-score of -0.38 (35.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,592 mm³, 9.2% above the reference mean. With a Z-score of 0.69 (75.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,960 mm³, 0.4% below the reference mean. With a Z-score of -0.03 (48.6th percentile), this represents normal volume . ",
  "text_data": "Age is 84.4 years. Gender is Female. Education: 17 years. MMSE: 27.0. MoCA: 22.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.45, 7.3th percentile), which is a key biomarker for Alzheimer's disease, while other brain regions are within normal ranges. The MoCA score of 22 suggests mild cognitive impairment (MCI), while the MMSE of 27 is borderline normal but may reflect early decline given the hippocampal atrophy.  \n\n**Diagnosis:** **MCI** (Mild Cognitive Impairment)  \n**Confidence:** **Medium** (due to hippocampal atrophy and MoCA score, but MMSE is near-normal and APOE4-negative status reduces certainty)",
  "timestamp": "2025-07-26T16:36:06.332642"
}