Impact of a structured quantitative program on [18F]FP-CIT PET interpretation: a multicenter study of diagnostic...

Area of Science:

• Neurology
• Nuclear Medicine
• Radiology

Background:

• Idiopathic Parkinson's disease (IPD) diagnosis can be challenging, often requiring advanced imaging techniques.
• Differentiating IPD from essential tremor or drug-induced parkinsonism is crucial for appropriate patient management.
• [18F]FP-CIT PET scans are utilized for evaluating parkinsonian syndromes.

Purpose of the Study:

• To assess the impact of a structured quantitative analysis program on the interpretation of [18F]FP-CIT PET scans.
• To evaluate improvements in diagnostic performance, interrater reliability, and reader confidence.
• To determine the program's effectiveness in distinguishing IPD from other parkinsonian conditions.

Main Methods:

• Retrospective multicentre study involving 637 patients undergoing [18F]FP-CIT PET and MRI.
• Readers performed qualitative assessments pre-program and quantitative assessments post-program.
• Diagnostic metrics, interrater reliability (Cohen's κ), and reader confidence were compared.

Main Results:

• Interrater reliability improved significantly from substantial to almost perfect (Cohen's κ: 0.768 to 0.970).
• Reader confidence significantly increased, with a shift toward high-confidence ratings.
• Diagnostic accuracy improved from 92.8% to 94.3% post-program.

Conclusions:

• A structured quantitative analysis program enhances [18F]FP-CIT PET interpretation.
• The program leads to improved diagnostic accuracy, interrater reliability, and reader confidence.
• Integrating quantitative analysis tools can improve diagnostic consistency in clinical practice.