Interventional CT & CT-Fluoroscopy Quiz - Chapter 23

Most laboratory evaluations for CT-guided biopsy procedures include prothrombin time, partial thromboplastin time, and ____________.

platelet count

True or False? CT and CT fluoroscopy (CTF) must be used separately and cannot be used in combination.

False

True or False? CT fluoroscopy (CTF) capabilities are not standard on scanners.

True

True or False? CT fluoroscopy (CTF) allows for the near real-time capabilities of traditional fluoroscopy but does not provide the superior contrast resolution of CT.

False

Which is not a high-density material?

Metal

Bone

Synthetic catheters

Gas

gas

Two different imaging techniques are used for CT-guided interventions: sequential CT and ____________.

CTF

When CTF is used it is very important that CTF exposure time and ________ be kept as low as possible.

tube current (mA)

What is the primary complication of all types of biopsy procedures?

Bleeding

What is the primary complication of CT-guided lung biopsies?

Pneumothorax

Which statement about CT interventional procedures is not true?

A. Because of radiation dose concerns, patients are limited to a single position during the procedure.

B. Because the tip of the needle within the structure can be visualized and slice thickness can be as narrow as 0.5 mm, interventions can be performed on small structures.

C. CT images permit the clinician to plan an access route to the lesion by showing the relationship of surrounding structures.

D. High-resolution CT images provide precise three-dimensional localization of lesions.

A. Because of radiation dose concerns, patients are limited to a single position during the procedure.

The overall complication rate for a fine-needle biopsy is approximately what percent?

2%

How can dose rates be minimized when CTF is used?

By exclusively using intermittent fluoroscopy

Which is a drawback to using sequential CT scanning for intervention procedures?

The procedure can be lengthy.

What are the most common interventional procedures?

Drainage of abscesses

CT-guided biopsies

Percutaneous diskectomy of herniated disks

Percutaneous administration of chemotherapeutic agents

CT-guided biopsies