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Questions and Answers
What is the main purpose of CTA?
What is the main purpose of CTA?
- To obtain axial MDCT images during contrast infusion for visualization of bones
- To obtain axial MDCT images during contrast infusion for visualization of arteries (correct)
- To obtain axial MDCT images during contrast infusion for visualization of soft tissues
- To obtain axial MDCT images during contrast infusion for visualization of veins
What is the recommended contrast injection rate for lower-limb CTA?
What is the recommended contrast injection rate for lower-limb CTA?
- 4 mL s–1 via a peripheral vein (correct)
- 6 mL s–1 via a peripheral vein
- 8 mL s–1 via a peripheral vein
- 2 mL s–1 via a peripheral vein
What is the preferred technique for delay in lower-limb CTA?
What is the preferred technique for delay in lower-limb CTA?
- Manual adjustment of delay
- Bolus tracking technique (correct)
- Real-time delay adjustment
- Preset empirical delay
What is the recommended slice thickness for lower-limb CTA?
What is the recommended slice thickness for lower-limb CTA?
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What are the indications for lower-limb CTA?
What are the indications for lower-limb CTA?
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Study Notes
CTA Overview
- The main purpose of CTA (Computed Tomography Angiography) is to evaluate the vascular system and diagnose vascular diseases.
CTA Technique
- The recommended contrast injection rate for lower-limb CTA is 4-5 mL/sec.
- The preferred technique for delay in lower-limb CTA is the bolus tracking technique, which involves tracking the contrast bolus to ensure optimal contrast enhancement.
CTA Image Acquisition
- The recommended slice thickness for lower-limb CTA is 0.5-1.5 mm, which provides high-resolution images of the vascular system.
CTA Indications
- Indications for lower-limb CTA include suspected peripheral artery disease, acute limb ischemia, and trauma or injury to the lower limb.
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