CT and MRI fundamentals Flashcards
week 4
What are the three components of a CT scanner?
- The gantry
- The operator’s console
- The computer(s)
What is the primary use of CT in trauma cases?
To assess multiple injuries to osseous and soft tissue structures from one imaging series.
What imaging technique excels in evaluating spinal stenosis?
CT myelography.
What are the advantages of CT over MRI?
- Less time consuming
- Usually less expensive
- Less problematic for patients with claustrophobia
What is the standard protocol in trauma for immediate assessment of intracranial bleeding?
Head CT.
What imaging characteristics can be adjusted in CT by setting radiodensities?
Windowing.
What is the primary function of Magnetic Resonance Imaging (MRI)?
To produce cross-sectional images using a magnetic field and radiofrequency signals.
What does T1 imaging measure?
Energy from structures such as fat that give up energy rapidly.
What does T2 imaging measure?
Energy late in the decay of transverse relaxation, focusing on structures rich in water.
What is the main clinical application of MRI in sports injuries?
Differentiating between partial and complete tears of tendons and ligaments.
What is the best modality for evaluating disk herniations?
MRI.
Fill in the blank: CT is the modality of choice for neuroimaging in _______ settings.
acute
True or False: MRI is more sensitive than a bone scan for detecting bone metastases.
True
What is the disadvantage of CT related to radiation?
Relatively high radiation exposure.
What does MRI excel in displaying?
Soft tissue detail.
What are the key components of the PT specific Hypothetico-deductive model?
- Bodychart/intake form
- Subjective
- Objective Exam
- ROM
- MMTs
- Special Tests
- Palpation
- Treatment
- Follow up
What is a common misconception communicated through medical imaging results?
Words that harm such as ‘You have inflammation’ or ‘Your X-rays show misalignment’.
What is the significance of thinner slices in CT imaging?
They improve spatial resolution.
What is the primary challenge when distinguishing the architecture of bone in CT images?
The radiodensities of cortical and cancellous bone appear very bright.
