{
  "ptid_time": "130_S_4817_2013-01-22",
  "img_path": "/data/qiuhui/data/adni/images/130_S_4817/2013-01-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 26,902 mm³, 10.4% below the reference mean. With a Z-score of -0.25 (40.2th percentile), this represents normal volume ; hippocampal volume measures 6,984 mm³, 13.0% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; whole brain volume measures 1,087,760 mm³, 4.1% below the reference mean. With a Z-score of -0.58 (28.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,660 mm³, 14.1% below the reference mean. With a Z-score of -0.98 (16.4th percentile), this represents normal volume ; fusiform gyrus volume measures 20,357 mm³, 2.3% above the reference mean. With a Z-score of 0.19 (57.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,888 mm³, 24.6% below the reference mean. With a Z-score of -2.03 (2.1th percentile), this represents significant atrophy. ",
  "text_data": "Age is 61.2 years. Gender is Male. Education: 20 years. MMSE: 27.0. MoCA: 25.0. Laboratory findings: . APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows significant atrophy in the middle temporal gyrus (Z-score -2.03, 2.1st percentile) and mild hippocampal atrophy (Z-score -1.30, 9.7th percentile), both of which are associated with early neurodegenerative changes. Despite normal cognitive screening scores (MMSE 27, MoCA 25), the presence of APOE4 homozygosity (2.0) increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Cognitive scores are borderline normal, but imaging and genetic risk suggest early decline.)",
  "timestamp": "2025-07-26T14:51:50.118883"
}