Infection practice test

Question 1

What is the optimal scanning time for neoplasm when
using 67Ga citrate?
a. 4hours
b. 6hours
c. 24 hours
d. 48 hours

Answer 1

b

Question 2

Which of the following is true of 67Ga citrate
and mIn labeled leukocytes?
a. both require use of a medium energy collimator
b. both can be used to effectively image neoplasms
and infections
c. both have 3 gamma peaks available for imaging
d. all of the above
e. a and b only

Answer 2

a

Question 3

111In pentetreotide is a:

a. potassium analog
b. monoclonal antibody
c. somatostatin analog
d. radiocolloid

Answer 3

c

Question 4

A dose of 11l In satumomab pendetide should
be before injection.
a. shielded
b. filtered
c. assayed
d. all of the above
e. a and c only

Answer 4

d

Question 5

Advantages of 201Tl chloride over 67Ga citrate include:

a. much shorter half life
b. less uptake in inflammatory processes
c. imaging may take place sooner
d. all of the above
e. b and c only

Answer 5

e

Question 6

A monoclonal antibody is developed which displays
cross-reaction. This means:
a. the antibody triggers an immune response in the
patient
b. the antibody will bind antigens other than the one
it was formed with
c. the antibody can be labeled with either 99mTc
or 111In
d. none of the above

Answer 6

b

Question 7

Normal areas of uptake for 67Ga citrate include all
of the following except:
a. intestinal mucosa
b. parathyroid glands
c. liver
d. epiphyses in pediatric patients

Answer 7

b

Question 8

Visualization of kidneys at 48 hours is on a scan
using 111In pentetreotide and on a 67Ga citrate
scan.
a. normal, abnormal
b. abnormal, normal
c. normal, normal
d. abnormal, abnormal

Answer 8

a

Question 9

On a Monday morning, a technologist learns that
a patient needs to be scheduled for imaging with 67Ga
citrate, and also a lower GI. If the ordering physician
wishes that both exams be done within the week,
how should these studies be scheduled?
a. lower GI on Monday morning, and 67Ga citrate
on Monday afternoon
b. lower GI on Monday morning, and 67Ga citrate
on Wednesday
c. 67Ga injection on Monday morning followed by
imaging each day, lower GI at noon on Friday
d. inject patient with 67Ga citrate on Monday morning,
send for lower GI, and then perform first imaging
of gallium on Monday afternoon

Answer 9

c

Question 10

If a low energy collimator is using for imaging 67Ga,
what will be the effect?
a. there is increased septal penetration
b. poor spatial resolution
c. decreased sensitivity
d. aandc
e. a and b

Answer 10

e

Question 11

In general, the best radiopharmaceutical to use for a
suspected abdominal abscess is:
a. 67Ga citrate
b. mIn labeled leukocytes
c. mIn satumomab pendetide
d. mIn octreotide

Answer 11

b

Question 12

For imaging of inflammation or infection, leukocytes
may be labeled with:
a. 1uin oxine
b. 99mTc exametazime
c. 67 Ga citrate
d. all of the above
e. a and b only

Answer 12

e

Question 13

The images in Figure 12.1 were obtained 24 hours
following the injection of radiopharmaceutical to
visualize infection in the right leg. The radiopharmaceutical used was:
a. 99mTc sulfur colloid
b. 111 In labeled WBCs
c. 67Ga citrate
d. 99mTc exametazime

Answer 13

b

Question 14

If platelets are inadvertently labeled along with
leukocytes during labeling with Ill In oxine for imaging
infection, the resulting scan may be:
a. false pos
b. false neg

Answer 14

b

Question 15

The collection of whole blood for leukocyte labeling
should be performed:
a. with a small bore needle
b. through an existing IV line
c. using a heparinized syringe
d. with a shielded syringe

Answer 15

c

Question 16

To screen for infection in a severely leukopenic patient,
the best choice of radiopharmaceutical would be:
a. 99mTc labeled WBCs
b. 67Ga citrate
c. 111In labeled WBCs
d. 99mTc sulfur colloid

Answer 16

b

Question 17

Gravity sedimentation involves the settling of cells:

a. after centrifugation
b. after time has passed
c. after the syringe or test tube is inverted
d. after the sample has been placed over a magnet

Answer 17

b

Question 18

The most appropriate dose to inject for imaging inflammation with min labeled leukocytes is:

a. 0.5-1.0 mCi
b. 2.0-4.0 mCi
c. 5-10 mCi
d. 6-8 mCi

Answer 18

a

Question 19

67Ga is often used with 3 phase bone scans to detect:

a. arthritis
b. lung metastases
c. osteomyelitis
d. avascular necrosis
e. rib fractures

Answer 19

c

Question 20

On planar abdominal images obtained with 67Ga citrate,
suspicious activity is noticed. Which technique would be
the first choice for further investigation of that activity?
a. sequential SPECT scanning to observe change
in the activity
b. subtract images obtained with 99mTc sulfur colloid
c. hydrate the patient and encourage voiding before
reimaging
d. perform another exam with mIn leukocytes

Answer 20

a

Question 21

Chewing gum between injection of 18FDG and PET
scanning will have no effect on the resulting images.
a. True
b. False

Answer 21

b

Question 22

Why is it important to know if a patient has an inflammatory condition before performing an 18FDG-PET
scan?
a. 18FDG and certain anti-inflammatory medications
cause severe reactions when used simultaneously.
b. 18FDG can exacerbate inflammatory conditions.
c. some inflammatory conditions cause areas of increased uptake of 18FDG.
d. none of the above

Answer 22

c

Question 23

Patient preparation for an 18FDG-PET scan includes:
a. NPO after midnight the evening before imaging
b. fasting state of at least 4 hours prior to the exam
c. avoiding intense physical activity the day before the
exam
d. all of the above
e. b and c only

Answer 23

e

Question 24

Which dose and route of administration is the best
choice when performing a whole body PET scan with
18FDG and a dedicated PET scanner?
a. 2 mCi IV
b. 2 mCi IM
c. 10 mCi IV
d. 10 mCi IM
e. 30 mCI IV

Answer 24

c

Question 25

Fill in the blank. High blood glucose levels may
_____________ 18FDG uptake in tumors.
a. decrease
b. increase

Answer 25

a