{
  "ptid_time": "072_S_4769_2012-07-12",
  "img_path": "/data/qiuhui/data/adni/images/072_S_4769/2012-07-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,536 mm³, 0.5% below the reference mean. With a Z-score of -0.01 (49.5th percentile), this represents normal volume ; hippocampal volume measures 7,195 mm³, 7.8% below the reference mean. With a Z-score of -1.09 (13.7th percentile), this represents mild atrophy; whole brain volume measures 999,068 mm³, 4.0% below the reference mean. With a Z-score of -0.48 (31.6th percentile), this represents normal volume ; entorhinal cortex volume measures 2,634 mm³, 28.7% below the reference mean. With a Z-score of -2.25 (1.2th percentile), this represents significant atrophy; fusiform gyrus volume measures 17,032 mm³, 7.6% below the reference mean. With a Z-score of -0.69 (24.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,223 mm³, 11.2% below the reference mean. With a Z-score of -0.93 (17.7th percentile), this represents normal volume . ",
  "text_data": "Age is 58.0 years. Gender is Female. Education: 14 years. Handedness: Left. Race: White. Medical history: Psychiatric; Neurologic; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Smoking; Major Surgical Procedures. MMSE: 30.0. MoCA: 27.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The imaging shows significant atrophy in the entorhinal cortex (Z-score -2.25, 1.2th percentile) and mild hippocampal atrophy (Z-score -1.09, 13.7th percentile), both key regions affected in early Alzheimer's pathology. However, cognitive scores (MMSE 30, MoCA 27) are within normal limits, and amyloid PET (AV45) is negative, making neurodegenerative dementia less likely.  \n\nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium  \n(Confidence is medium due to the discrepancy between structural atrophy and preserved cognition, suggesting possible preclinical changes or non-AD etiology.)",
  "timestamp": "2025-07-26T09:26:03.587101"
}