{
  "ptid_time": "036_S_4878_2013-08-29",
  "img_path": "/data/qiuhui/data/adni/images/036_S_4878/2013-08-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,326 mm³, 20.5% below the reference mean. With a Z-score of -0.47 (32.0th percentile), this represents normal volume ; hippocampal volume measures 7,462 mm³, 4.9% above the reference mean. With a Z-score of 0.45 (67.3th percentile), this represents normal volume ; whole brain volume measures 902,478 mm³, 7.4% below the reference mean. With a Z-score of -0.93 (17.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,784 mm³, 3.0% above the reference mean. With a Z-score of 0.19 (57.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,608 mm³, 15.3% above the reference mean. With a Z-score of 1.39 (91.7th percentile), this represents mild enlargement; middle temporal gyrus volume measures 17,623 mm³, 8.1% below the reference mean. With a Z-score of -0.70 (24.2th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Female. Education: 14 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild deviations (e.g., fusiform gyrus shows mild enlargement, middle temporal gyrus is slightly below reference). Cognitive scores (MMSE 30, MoCA 26) are within normal limits for age, and there is no APOE4 genetic risk factor. No significant atrophy in key Alzheimer’s regions (hippocampus, entorhinal cortex) is observed.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T06:19:08.092635"
}