Ct Registry Ch7 Pt1

Front 1

IV contrast agents may be administered for evaluating masses of the chest, hilar masses, lymphoma, __________________, or to enhance _________________________.

Back 1

cardiac masses

the aorta and other vessels of the chest

Front 2

Reasons to scan the chest from the most inferior portion to the most superior portion include ___________________ and _____________________.

Back 2

avoid streak artifacts from IV contrast bolus in subclavian

help to cover the most critical portion of the lungs where diseases typically occur most, on patient's that cannot hold their breath long

Front 3

In order to minimize the artifacts from cardiac motion when imaging the chest, it is desirable to utilize ____________________.

Back 3

the shortest scan times possible. Also cardiac gating techniques may be used

Front 4

The _______________ is the mass of tissues and organs separating the pleural spaces.

Back 4

mediastinum

Front 5

The mediastinum includes:(9)

Back 5

heart
origins of great vessels
trachea
bronchi
esophagus
thymus
lymph nodes
thoracic duct
phrenic and vagus nerves

Front 6

CT of Mediastinum:
region covered?

Back 6

apices of the lungs superiorly through the level of the adrenals inferiorly

Front 7

CT of Mediastinum:
IV contrast speed and delay if used?

Back 7

speed:
3mL/sec

delay:
20 to 25 seconds

Front 8

CT of Mediastinum:
mAs?

Back 8

200 to 300

Front 9

CT of Mediastinum:
settings for filming and post-processing?

Back 9

soft tissue reconstruction algorithm
WW 300
WL 0

Bone settings(if required)
WW 2000
WL 400

Front 10

CT of Mediastinum:
In what situation would a sharp reconstruction algorithm be useful to this evaluation?

Back 10

emphysema, sarcoidosis, AIDS, or bronchiechtasis

Front 11

CT of Lungs:
Because it can be very difficult to differentiate lung nodules from peripheral pulmonary blood vessels, the CT lung scan can only differentiate nodules which are _________________________ than the vessels in that region.

Back 11

larger in cross section

Front 12

CT of Lungs:
Lung surveys always include the adrenal glands, since this is a frequent location of ______________________.

Back 12

metastatic lesions

Front 13

CT of Lungs:
scan coverage?

Back 13

sternal notch superiorly through the level of the adrenals inferiorly

Front 14

CT of Lungs:
Reconstructed slice thickness?(2)

Back 14

5mm slices for standard lung scans

0.5 to 1mm overlapping slices if a nodule is suspected or found

Front 15

CT of Lungs:
mAs?

Back 15

200 to 300 mAs

Front 16

CT of Lungs:
filming and post-processing?

Back 16

soft tissues at WW 300 WL 0

Lung window at WW 1500 to 2000 WL -400 to -600

Front 17

CT of Pulmonary Vessels:
Pulmonary Embolism accounts for about ___________ deaths per year in the United States and is the _______ leading cause of cardiovascular death.

Back 17

50,000

third

Front 18

The Prospective Investigation of Pulmonary Embolism Diagnosis study demonstrated that _____ of all patients with suspected pulmonary embolus require additional testing following a ventilation-perfusion scan to confirm the presence of absence of a PE.

Back 18

75%

Front 19

Cardiac CT:
What BPM is necessary for a cardiac CT?

Back 19

60 BPM or lower unless the scanner is fast enough

Front 20

Cardiac CT:
scan coverage?

Back 20

carina to 1 cm below the base of the heart

Front 21

Cardiac CT:
what kind of slice thickness is typically used?

Back 21

3mm slices for calcium scoring

Less than 1mm for coronary CTA

Front 22

Cardiac CT:
Filming and post-processing?

Back 22

Soft tissue with WW 450 WL 40

Thin MIP double oblique planes of the coronary arteries