{
  "ptid_time": "041_S_6401_2019-05-14",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6401/2019-05-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,608 mm³, 15.3% below the reference mean. With a Z-score of -0.37 (35.7th percentile), this represents normal volume ; hippocampal volume measures 8,605 mm³, 13.8% above the reference mean. With a Z-score of 1.35 (91.1th percentile), this represents mild enlargement; whole brain volume measures 1,130,950 mm³, 4.8% above the reference mean. With a Z-score of 0.62 (73.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,830 mm³, 6.6% below the reference mean. With a Z-score of -0.45 (32.7th percentile), this represents normal volume ; fusiform gyrus volume measures 17,882 mm³, 5.1% below the reference mean. With a Z-score of -0.43 (33.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,636 mm³, 3.3% below the reference mean. With a Z-score of -0.30 (38.4th percentile), this represents normal volume . ",
  "text_data": "Age is 76.7 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 29.0. Logical Memory: 13.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with no significant atrophy in key regions like the hippocampus (which is mildly enlarged) or entorhinal cortex. Cognitive scores (MMSE 30, MoCA 29) are intact, and there is no clinical evidence of impairment. The presence of one APOE4 allele increases genetic risk but does not indicate current pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:30:07.347417"
}