Head And Neck Imaging Flashcards
Head and Neck imaging methods & reasons
Is it useful to do an XRAY of the paranasal sinuses?
No, it is not specific enough, and does not help therapeutic decision making
Indication of low dose CT of paranasal sinuses
Prolonged or recurrent ventilation deficit / sinusitis
What is the imaging modality of choice for sinuses of the head?
Normal dose CT - more detailed bony and soft tissue structures
What are the imaging modalities for oral cavity, tongue, salivary glands?
MR, CT, US
What could be an echogenic / hyperdense structure with parotid gland swelling?
Obstructing salivary stone
What does an abscess look like in CT?
Ring like enhancement with central hypodense area
How can we confirm the presence of a head tumor in CT?
Using dynamic contrast enhanced MR sequence - it shows early intensive enhancement
Is dysphagia an appropriate indication for an MR study?
No, it is not
Indications for barium swallowing study?
- Dysphagia
- Achalasia
- Foreign body
- Reflux
What is the imaging modality indicated for dysphagia?
Barium swallow study
What is the curative possibility for advanced / non surgical tumors?
Complete regression can be achieved, with radio-chemotherapy - especially in HPV associated planocellular cancer
What imaging modality can we use to find out primary tumors?
PET-CT
What is the imaging modality for hearing / acoustic system?
High resolution CT or MRI
Why is HRCT or MRI preferred for the hearing / acoustic system?
- HRCT : It depicts outer and middle ear with great spatial resolution
- MRI : demonstrates the structures of the inner ear and cerebellopontine angle
