{
  "ptid_time": "068_S_2315_2011-10-18",
  "img_path": "/data/qiuhui/data/adni/images/068_S_2315/2011-10-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,018 mm³, 43.3% above the reference mean. With a Z-score of 1.08 (86.1th percentile), this represents mild enlargement; hippocampal volume measures 7,794 mm³, 1.4% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; whole brain volume measures 940,268 mm³, 8.6% below the reference mean. With a Z-score of -1.08 (14.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 4,217 mm³, 8.3% above the reference mean. With a Z-score of 0.65 (74.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,071 mm³, 11.7% below the reference mean. With a Z-score of -1.32 (9.3th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,718 mm³, 3.9% below the reference mean. With a Z-score of -0.35 (36.4th percentile), this represents normal volume . ",
  "text_data": "Age is 68.7 years. Gender is Female. Education: 13 years. MMSE: 28.0. MoCA: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild ventricular enlargement and mild whole brain atrophy, along with mild atrophy in the fusiform gyrus, while hippocampal and entorhinal cortex volumes are normal. Cognitive scores (MMSE 28, MoCA 26) are within normal limits, and there is no APOE4 risk allele. The mild structural changes without significant cognitive impairment suggest early neurodegenerative changes but not yet meeting criteria for dementia.  \n\n**Diagnosis:** Mild Cognitive Impairment (MCI)  \n**Confidence:** Medium (structural changes are present, but cognitive performance remains intact, making early MCI more likely than dementia or normal aging alone)",
  "timestamp": "2025-07-26T08:57:13.799681"
}