{
  "ptid_time": "014_S_0169_2007-08-30",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0169/2007-08-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,286 mm³, 47.1% above the reference mean. With a Z-score of 1.08 (86.0th percentile), this represents mild enlargement; hippocampal volume measures 7,224 mm³, 1.5% above the reference mean. With a Z-score of 0.14 (55.6th percentile), this represents normal volume ; whole brain volume measures 1,023,420 mm³, 5.0% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,595 mm³, 2.1% below the reference mean. With a Z-score of -0.13 (44.8th percentile), this represents normal volume ; fusiform gyrus volume measures 15,060 mm³, 11.5% below the reference mean. With a Z-score of -1.04 (14.8th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,125 mm³, 5.4% below the reference mean. With a Z-score of -0.47 (31.8th percentile), this represents normal volume . ",
  "text_data": "Age is 73.4 years. Gender is Female. Education: 16 years. MMSE: 28.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (47.1% above mean, Z-score 1.08), while hippocampal and whole brain volumes are normal. The fusiform gyrus exhibits mild atrophy (11.5% below mean, Z-score -1.04), but other regions (entorhinal cortex, middle temporal gyrus) are within normal limits. The MMSE score of 28 is normal, and APOE4 status (heterozygous) suggests some genetic risk.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (Mild ventricular enlargement and fusiform atrophy could indicate early changes, but preserved cognition and normal hippocampal volume support CN.)",
  "timestamp": "2025-07-25T23:38:38.952114"
}