Procedures - Chest

Question 1

What are clinical indications for a chest CT?

Answer 1

Interstitial lung disease
Evaluation of the mediastinum
Detection and differentiation of pulmonary nodules/masses 
Oncologist staging 
CTA of major vessels
Cardiac CT 
Assessment of airways

Question 2

What is a one of the key attributes of helical MDCT?

Answer 2

Speed

Question 3

What is a few advantages to MDCT for a chest scan?

Answer 3

Retrospective recons
Better visualization of small pulmonary nodules
High-quality MPR and 3-D techniques, and simultaneous high-resolution CT

Question 4

How is the patient positioned for a chest CT?

Answer 4

Supine with arms above head

Question 5

What is the scan plane for a chest scan?

Answer 5

Above the spices through the costophrenic angles

Question 6

What is the scan plane for an oncologist CT survey of the chest?

Answer 6

Apices through adrenal glands

Question 7

What anatomical structure is a common site for metastatic deposit?

Answer 7

Adrenal glands

Question 8

When is data acquisition performed for a CT chest?

Answer 8

End of full inspiration

Question 9

What size detector width is used for a CT chest on a 64slice or higher scanner?

Answer 9

Narrow detector width

Question 10

What is the typical detector width range for a ct chest on a 64slice scanner or higher?

Answer 10

0.5-2mm

Question 11

What is the width for reconstructions of a CT chest on a 64-slice and higher?

Answer 11

3-5mm

Question 12

What are the kvp, mAs and rotational speed factors used for a ct chest?

Answer 12

80-120kvp
40-300mA
0.33-1.0sec

Question 13

For whom should a low-dose ct be considered?

Answer 13

For all patients

Question 14

What factor must be set in accordance with the patient’s abilities to hold the breath for the length of the scan?

Answer 14

Pitch

Question 15

What algorithm is used for evaluation of the mediastinum and soft tissues?

Answer 15

Standard algorithm

Question 16

What are indications for adding a high-spatial frequency/bone algorithm?

Answer 16

Small airway disease, bone metastases, and fractures to the thorax

Question 17

What algorithm should NOT be used for evaluation of small pulmonary nodules because of risk of a false-positive demonstration of nodule calcification?

Answer 17

High spatial frequency algorithm

Question 18

What anatomical region consists of a wide range of anatomical structures no densities?

Answer 18

Chest

Question 19

What is the WW and WL for lung parenchyma?

Answer 19

WW 1400 WL -450

Question 20

What is the WW and WL of mediastinum?

Answer 20

WW 350 WL 40

Question 21

What is the WW and WL of bone in the chest?

Answer 21

WW 2,000 WL 300

Question 22

What type of image reconstructions assist in differentiating surrounding pulmonary vasculature from true nodules?

Answer 22

MIP

Question 23

How much overlap is required to create MPR and 3D images from thin sections for a chest ct?

Answer 23

50%