{
  "ptid_time": "137_S_4596_2013-04-12",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4596/2013-04-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 33,465 mm³, 11.5% above the reference mean. With a Z-score of 0.27 (60.7th percentile), this represents normal volume ; whole brain volume measures 1,051,730 mm³, 7.3% below the reference mean. With a Z-score of -1.03 (15.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,264 mm³, 23.4% below the reference mean. With a Z-score of -1.62 (5.2th percentile), this represents moderate atrophy; fusiform gyrus volume measures 16,702 mm³, 16.1% below the reference mean. With a Z-score of -1.34 (9.0th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,748 mm³, 20.8% below the reference mean. With a Z-score of -1.71 (4.3th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 66.7 years. Gender is Male. Education: 20 years. MMSE: 27.0. MoCA: 21.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild to moderate atrophy in key Alzheimer's-related regions (entorhinal cortex, fusiform gyrus, middle temporal gyrus), alongside cognitive scores suggesting mild impairment (MoCA 21/30, MMSE 27/30). The absence of APOE4 reduces genetic risk but does not rule out neurodegeneration.  \n**Diagnosis:** Mild Cognitive Impairment (MCI)  \n**Confidence:** Medium (imaging supports MCI, but clinical scores are borderline and APOE4-negative status lowers Alzheimer's-specific certainty).",
  "timestamp": "2025-07-26T16:37:39.306274"
}