Exam 1 Mosby

Question 1

Average range for activated PTT

Answer 1

25-35 seconds
- used for screening in invasive procedures

Question 2

The acronym CTDI is used to describe

Answer 2

CT dose index is used to quantify the radiation dose received by the Pt during CT

Question 3

General s/s of shock

Answer 3

• rapid breathing
• tachycardia
• hypOtension
• weak pulse
• pallor
• cyanosis
• cold clammy skin

Question 4

Non-ionic contrast names

Answer 4

Iopamidol (isovue)

Iohexol (omnipaque)

Iopromide (ultravist)

Question 5

Used to measure Pt dose from CT scan

Answer 5

Ionization chamber

Question 6

Complete cardiac diastole corresponds to which portion of the cardiac cycle on an EKG

Answer 6

T wave

Question 7

Effective dose accounts for

Answer 7

The type of tissue that radiation is deposited in.
Unit of measurement is Sv (sievert)

Question 8

Common routes of parental medication administration

Answer 8

Intramuscular
Intravenous
Intradermal
Subcutaneous

Question 9

What does LOCM stand for?

Answer 9

Low osmolar contrast media

Omni, isovue, optiray

Question 10

IOCM meaning

Answer 10

ISO-osmolar contrast media
Iodixanol (visipaque)

Question 11

Radiation exposure and it’s potentially harmful effects have a relationship that is termed ________ in nature

Answer 11

Stochastic

Question 12

Effect that has no threshold dose but increases in probability with increasing dose

Answer 12

Stochastic effect
Like cancer or genetic mutations

Question 13

Radiation dose index calculation that takes into account the variations in absorption across the field of view due to beam hardening

Answer 13

CTDIw

Question 14

Components of a comprehensive CT stroke management protocol typically includes

Answer 14

Pre contrast sequence of brain
CTA brain and carotid
CT perfusion (CTP) of brain

Question 15

Simple cysts have an average attenuation value of

Answer 15

0 to +20 HU
primarily water

Question 16

The arterial phase of a hepatic contrast enhancement occurs as approx

Answer 16

25-35 seconds

Question 17

The abdominal aorta bifurcates at the level of

Answer 17

L4

Question 18

During a spiral or helical CT, the scanner acquires data

Answer 18

Continuously as the patient travels through the the gantry
In the form of a complete volumetric data

Question 19

Which phase of renal contrast enhancement best demonstrates transitional cell carcinoma of the bladder?

Answer 19

Excretory
Delay of 3-15 minutes

Question 20

The right lateral decub position is often used to differentiate what

Answer 20

The pancreatic head and the duodenum

Question 21

The still viable ischemic cerebral tissue that surrounds the infarct core in a PT with an acure stroke is termed the

Answer 21

Ischemic penumbra

Question 22

Diffuse fatty infiltration of the hepatic parenchyma may be referred to as

Answer 22

Steatosis

Question 23

This phase demonstrates optimal enhancement of the renal cortex with maximum differentiation of the cortex from the renal medulla

Answer 23

Corticomedullary phase
30-40 seconds after contrast initiation

Question 24

Routine CT head should have the gantry angled

Answer 24

15° above the IOML

Question 25

An entero vesical fistula is an abnormal communication between

Answer 25

The bowel and the bladder

Question 26

The imaging plane that is parallel to the foot’s plantar surface is called the

Answer 26

Axial plane

Question 27

The ___________ plane is parallel to the metatarsals

Answer 27

Oblique axial plane

Question 28

Refers to the condition of intermittent cramping pain in the legs due to poor circulation

Answer 28

Claudication

Question 29

HRCT of the chest should be performed with _______ sections

Answer 29

Thin, 1-2 mm

Question 30

The pituitary gland is best demonstrated during CT in which plane

Answer 30

Coronal

Question 31

The most common site of organ injury due to blunt abd trauma is the

Answer 31

Spleen

Question 32

What organs are located in the peritoneal cavity?

Answer 32

Stomach
Liver
Gallbladder
Spleen
Ovaries
Transverse colon
Most of the small intestine

Question 33

For a complete pelvis CT, sections should be obtained from the

Answer 33

Iliac crests to the pubic symphysis

Question 34

Air trapping within the trachea and bronchial tree may be optimally demonstrated with the multi planar volume reconstructions (MPVRs) of the thorax known as

Answer 34

mini-IPs (minimum intensity projections)