Lecture 5 Head and Neck- Radiology Flashcards
Name some uses of plain radiography in head and neck
- Lateral soft tissue neck
- Facial views (Maxillofacial)
- OPT (Dental assessment)
What is a Sialogram
radiographic examination of the salivary glands
What is a sinogram
Imaging of sinus tract
Define a videofluoroscopy
• A moving x-ray examination of swallowing. You will be asked to chew and swallow different varieties of food and drinks according to your identified difficulties and the images obtained will allow detailed analysis of your swallowing function.
What is a Sestambibi scan
- 6 (sesta) molecules of MIBI (methoxyisobutylisonitrile) attached to Tc99.
- Tc99 is absorbed faster by hyperfunctioning parathyroid gland than a normal one
- Performed to localize parathyroid adenoma, which causes Hyperparathyroidism
What is a SPECT CT
where two different types of scans are taken and the images or pictures from each are fused or merged together. The fused scan can provide more precise information about how different parts of the body function and more clearly identify problems such as tumours (lumps)
Does CT or MRI have radiation
CT- Radiation
MRI- No radiation
What contrast is used in a CT scan
Iodine
What contrast is used for MI
Gadolinium
What is used to scan
Bone
Thyroid
Paratyhroid
Isotope bone scan
Pertech
Sestamibi
When is PET CT used in head and neck
Unknown primary
Detection of recurrence post treatment
Assessment of treatment response
What is a PET scan
a technique that measures physiological function by looking at blood flow, metabolism, neurotransmitters, and radiolabelled drugs
• The technique is based on the detection of radioactivity emitted after a small amount of a radioactive tracer is injected into a peripheral vein. The tracer is administered as an intravenous injection usually 18-fluorodeoxyglucose (FDG)
• A common use for PET is to measure the rate of consumption of glucose in different parts of the body
