{
  "ptid_time": "136_S_0874_2006-11-06",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0874/2006-11-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,187 mm³, 23.1% below the reference mean. With a Z-score of -0.58 (28.2th percentile), this represents normal volume ; hippocampal volume measures 6,224 mm³, 19.0% below the reference mean. With a Z-score of -2.13 (1.6th percentile), this represents significant atrophy; whole brain volume measures 1,063,190 mm³, 3.3% above the reference mean. With a Z-score of 0.41 (66.0th percentile), this represents normal volume ; entorhinal cortex volume measures 2,623 mm³, 32.6% below the reference mean. With a Z-score of -2.53 (0.6th percentile), this represents significant atrophy; fusiform gyrus volume measures 15,424 mm³, 15.3% below the reference mean. With a Z-score of -1.72 (4.2th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 15,099 mm³, 26.4% below the reference mean. With a Z-score of -2.35 (0.9th percentile), this represents significant atrophy. ",
  "text_data": "Age is 66.1 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. Medical history: Malignancy. MMSE: 25.0. Logical Memory: 5.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in the hippocampus, entorhinal cortex, and middle temporal gyrus—key regions affected in Alzheimer's disease. The MMSE score of 25 suggests mild cognitive impairment, and the presence of two APOE4 alleles increases Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (likely prodromal Alzheimer's disease)  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T16:04:31.236873"
}