{
  "ptid_time": "127_S_1427_2007-08-20",
  "img_path": "/data/qiuhui/data/adni/images/127_S_1427/2007-08-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,314 mm³, 13.5% below the reference mean. With a Z-score of -0.34 (36.7th percentile), this represents normal volume ; hippocampal volume measures 8,585 mm³, 11.7% above the reference mean. With a Z-score of 1.32 (90.6th percentile), this represents mild enlargement; whole brain volume measures 1,071,630 mm³, 4.1% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,575 mm³, 8.2% below the reference mean. With a Z-score of -0.63 (26.3th percentile), this represents normal volume ; fusiform gyrus volume measures 15,827 mm³, 13.1% below the reference mean. With a Z-score of -1.47 (7.0th percentile), this represents mild atrophy; middle temporal gyrus volume measures 23,302 mm³, 13.6% above the reference mean. With a Z-score of 1.21 (88.6th percentile), this represents mild enlargement. ",
  "text_data": "Age is 69.6 years. Gender is Female. Education: 12 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Musculoskeletal; Gastrointestinal; Hematopoietic-Lymphatic; Renal-Genitourinary; Allergies or Drug Sensitivities; Smoking; Major Surgical Procedures. MMSE: 27.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.43 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mixed findings, with some regions (hippocampus, middle temporal gyrus) mildly enlarged and others (fusiform gyrus) mildly atrophied. The MMSE score of 27 is within the normal range, and the absence of APOE4 reduces genetic risk. No significant atrophy is seen in key Alzheimer’s-related regions like the hippocampus or entorhinal cortex.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to conflicting regional volume changes but preserved cognitive function and lack of high-risk markers)",
  "timestamp": "2025-07-26T13:09:09.105704"
}