{
  "ptid_time": "114_S_1103_2007-07-03",
  "img_path": "/data/qiuhui/data/adni/images/114_S_1103/2007-07-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,018 mm³, 0.0% above the reference mean. With a Z-score of 0.00 (50.0th percentile), this represents normal volume ; hippocampal volume measures 5,643 mm³, 19.0% below the reference mean. With a Z-score of -1.64 (5.0th percentile), this represents moderate atrophy; whole brain volume measures 943,758 mm³, 8.3% below the reference mean. With a Z-score of -1.09 (13.8th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,166 mm³, 20.2% below the reference mean. With a Z-score of -1.32 (9.3th percentile), this represents mild atrophy; fusiform gyrus volume measures 13,895 mm³, 23.1% below the reference mean. With a Z-score of -2.00 (2.3th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 18,126 mm³, 10.1% below the reference mean. With a Z-score of -0.91 (18.2th percentile), this represents normal volume . ",
  "text_data": "Age is 83.5 years. Gender is Male. Education: 18 years. MMSE: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows moderate atrophy (5th percentile), and the entorhinal cortex and fusiform gyrus also exhibit mild to moderate atrophy, which are key regions affected in Alzheimer's disease. However, the MMSE score of 28 is within the normal range, and there is no APOE4 allele, which reduces genetic risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to conflicting imaging and cognitive findings—significant atrophy in AD-related regions but preserved cognition)",
  "timestamp": "2025-07-26T11:43:31.471378"
}