{
  "ptid_time": "041_S_5100_2013-09-13",
  "img_path": "/data/qiuhui/data/adni/images/041_S_5100/2013-09-13/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,956 mm³, 37.5% above the reference mean. With a Z-score of 0.90 (81.5th percentile), this represents normal volume ; hippocampal volume measures 8,594 mm³, 13.7% above the reference mean. With a Z-score of 1.34 (90.9th percentile), this represents mild enlargement; whole brain volume measures 1,210,020 mm³, 12.1% above the reference mean. With a Z-score of 1.57 (94.2th percentile), this represents moderate enlargement; entorhinal cortex volume measures 3,447 mm³, 15.9% below the reference mean. With a Z-score of -1.08 (14.0th percentile), this represents mild atrophy; fusiform gyrus volume measures 19,277 mm³, 2.3% above the reference mean. With a Z-score of 0.20 (57.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,447 mm³, 4.2% below the reference mean. With a Z-score of -0.38 (35.4th percentile), this represents normal volume . ",
  "text_data": "Age is 71.7 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal and whole brain volumes are above the reference mean, while the entorhinal cortex shows mild atrophy. Cognitive scores (MMSE 29, MoCA 28) are within normal limits, and there is no APOE4 risk allele. The mild entorhinal atrophy is notable but not accompanied by significant cognitive decline.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild entorhinal atrophy but otherwise normal findings)",
  "timestamp": "2025-07-26T07:26:05.871668"
}