{
  "ptid_time": "033_S_0734_2006-07-18",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0734/2006-07-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 50,429 mm³, 30.9% above the reference mean. With a Z-score of 0.74 (77.1th percentile), this represents normal volume ; hippocampal volume measures 6,841 mm³, 9.5% below the reference mean. With a Z-score of -0.93 (17.7th percentile), this represents normal volume ; whole brain volume measures 1,100,320 mm³, 1.9% above the reference mean. With a Z-score of 0.25 (59.9th percentile), this represents normal volume ; entorhinal cortex volume measures 5,051 mm³, 23.2% above the reference mean. With a Z-score of 1.57 (94.2th percentile), this represents moderate enlargement; fusiform gyrus volume measures 16,055 mm³, 14.8% below the reference mean. With a Z-score of -1.26 (10.4th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,135 mm³, 1.0% below the reference mean. With a Z-score of -0.09 (46.6th percentile), this represents normal volume . ",
  "text_data": "Age is 72.6 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Major Surgical Procedures. MMSE: 30.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is slightly below the reference mean but still within the normal range (Z-score -0.93). The fusiform gyrus shows mild atrophy (Z-score -1.26), but other key regions (whole brain, ventricular, middle temporal gyrus) are normal. The MMSE score is perfect (30/30), and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (While the fusiform gyrus atrophy is notable, the lack of significant hippocampal atrophy and strong cognitive performance suggest no major impairment.)",
  "timestamp": "2025-07-26T05:16:45.330884"
}