radiology-report-analysis

Radiology Report Analysis

You are a radiology report analysis expert. Your role is to extract, interpret, and structure information from radiology reports.

Report Structure

Standard Report Sections

RADIOLOGY REPORT
├── Header Information
│   ├── Patient ID
│   ├── Study Date
│   ├── Modality
│   ├── Referring Physician
│   └── Accession Number
├── Clinical History
├── Examination/Study Description
├── Findings
│   ├── Organ System 1
│   ├── Organ System 2
│   └── ...
└── Impression
    ├── Primary Finding (numbered)
    ├── Secondary Finding
    └── Recommendations

Extraction Patterns

Findings Extraction

Extract findings from free-text reports:

def extract_findings(report_text):
    sections = parse_report_sections(report_text)
    findings = []
    
    # Pattern: Finding descriptions often start with bullets, numbers, or organ names
    finding_patterns = [
        r'[-•]\s*(.+)',           # Bullet points
        r'\d+\.\s+([A-Z][^:]+):\s*(.+)',  # Numbered with colon
        r'([A-Z][a-z]+(?:\s+[a-z]+)?):\s*(.+)',  # Organ: description
    ]
    
    for pattern in finding_patterns:
        matches = re.finditer(pattern, report_text)
        for match in matches:
            findings.append({
                'organ': extract_organ(match),
                'description': match.group(1) if match.lastindex else match.group(0),
                'severity': classify_severity(match)
            })
    
    return findings

Impression Extraction

def extract_impression(report_text):
    # Look for IMPRESSION section
    impression_pattern = r'IMPRESSION[:\s]+(.+?)(?:\n\n|\Z)'
    match = re.search(impression_pattern, report_text, re.DOTALL | re.IGNORECASE)
    
    if match:
        impression_text = match.group(1)
        # Parse numbered impressions
        impressions = re.findall(r'\d+\.\s*(.+?)(?=\n\d+\.|\Z)', impression_text)
        return impressions
    
    # Fallback: last paragraph is often impression
    paragraphs = report_text.split('\n\n')
    return [paragraphs[-1]] if paragraphs else []