{
  "ptid_time": "137_S_0301_2014-04-14",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0301/2014-04-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,594 mm³, 49.7% below the reference mean. With a Z-score of -1.34 (9.0th percentile), this represents mild atrophy; hippocampal volume measures 7,511 mm³, 15.6% above the reference mean. With a Z-score of 1.25 (89.5th percentile), this represents mild enlargement; whole brain volume measures 1,021,800 mm³, 10.1% above the reference mean. With a Z-score of 1.21 (88.7th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,366 mm³, 26.1% above the reference mean. With a Z-score of 1.41 (92.1th percentile), this represents mild enlargement; fusiform gyrus volume measures 15,623 mm³, 3.0% below the reference mean. With a Z-score of -0.23 (41.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,417 mm³, 7.7% above the reference mean. With a Z-score of 0.69 (75.3th percentile), this represents normal volume . ",
  "text_data": "Age is 81.4 years. Gender is Female. Education: 13 years. MMSE: 27.0. MoCA: 26.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal-to-above-average volumes in key regions (hippocampus, whole brain, entorhinal cortex). Cognitive scores (MMSE 27, MoCA 26) are within normal limits for age, and there is no APOE4 genetic risk.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild ventricular atrophy, but preserved cognition and no other concerning biomarkers)",
  "timestamp": "2025-07-26T16:09:08.374221"
}