{
  "ptid_time": "018_S_4400_2012-07-17",
  "img_path": "/data/qiuhui/data/adni/images/018_S_4400/2012-07-17/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,553 mm³, 49.2% below the reference mean. With a Z-score of -1.18 (11.9th percentile), this represents mild atrophy; hippocampal volume measures 8,465 mm³, 12.0% above the reference mean. With a Z-score of 1.17 (87.9th percentile), this represents mild enlargement; whole brain volume measures 1,024,420 mm³, 5.1% below the reference mean. With a Z-score of -0.66 (25.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,924 mm³, 4.3% below the reference mean. With a Z-score of -0.29 (38.5th percentile), this represents normal volume ; fusiform gyrus volume measures 18,088 mm³, 4.0% below the reference mean. With a Z-score of -0.34 (36.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,933 mm³, 11.3% below the reference mean. With a Z-score of -1.01 (15.5th percentile), this represents mild atrophy. ",
  "text_data": "Age is 71.6 years. Gender is Male. Education: 20 years. MMSE: 29.0. MoCA: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild ventricular and middle temporal gyrus atrophy, but hippocampal volume is above average, and other regions are within normal ranges. Cognitive scores (MMSE 29, MoCA 28) are intact, and APOE4 heterozygous status alone does not confirm pathology.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (imaging shows some atrophy but no significant cognitive impairment)",
  "timestamp": "2025-07-26T00:58:21.237032"
}