File 21

Question 1

Calibrator need to be checked:
A) Weekly
B) Monthly
C) Annually
D) Quarterly

Answer 1

depends

Dose -> Daily
Consistency -> Daily
Linearity -> Quartly
Accuracy -> Annual
Gemoetry -> installation and any time you move it

Question 2

Mechanism of action of FDG:

Answer 2

Answer: binds to glucose receptor.

Answer: binds to glucose receptor.
Notes:
- FDG is a glucose analogue that is actively transported across the blood-brain barrier (BBB)
and phosphorylated within cells. FDG uptake reflects the tissue glucose metabolism and is
usually high in high-grade tumors and relatively low in low-grade tumors.

Question 3

Picture of ultrasound of the bowel, what is the name of the artifact:

A) Commit tail
B) Mirror
C) Dirty shadow
D) Posterior acoustic shadow

Answer 3

C) Dirty shadow

Question 4

Best angel in ultrasound velocity:
A) 30°
B) 60°
C) 65°
D) 80°

Answer 4

A) 30°

Question 5

Echo density is independent of:

A) Transducer shape
B) Transducer diameter
C) Transducer frequency
D) Tissue depth

Answer 5

B) Transducer diameter

Question 6

Pic of MRI Which parameters will increase contrast but not increase
the patient dose:

A) Increase mAs
B) Increase kVp

Answer 6

B) Increase kVp

Question 7

Measuring the velocity in case of aortic cortication using:

A) Spin echo
B) FLUSH turbo
C) CIN
D) Phase Contrast

Answer 7

D) Phase Contrast

Question 8

To improve cardiac MRI:
A) Decrease pulse
B) Lower heart rate

Answer 8

B) Lower heart rate

Question 9

Most common cause of MRI artifact:

Answer 9

A) Gradient strength

Notes:
- + long echo time → motion artifact.

Question 10

Signal to noise ratio (SNR) in MRI is decreased by:

A) Increase number of acquisitions
B) Increase TR
C) Increase magnetic strength field
D) Decrease the slice thickness

Answer 10

D) Decrease the slice thickness

Answer: D
Notes:
↑ SNR
- ↑ Magnet
- ↑ FOV
- Thick Slices
- ↑ NEX
- ↑ TR ↓ TE
- ↓ Matrix
- ↓ Receiver Bandwidth

Question 11

You are conducting a study about HTN, the measurement 150 + 20, you select confidence level 95%, what is the confidence interval:

A) 110 – 190
B) 130 – 170
C) 145 – 155
D) 90 – 210

Answer 11

A) 110 – 190

Question 12

16-year-old cut her wrist to suicide, what you should do?

A) Treat her and refer to psychiatrist
B) Refer to another physician
C) Refuse to treat
D) Ignore

Answer 12

A) Treat her and refer to psychiatrist

Question 13

Case study about how living in 500-meter-high affect hypertension:

A) Cohort
B) Cross sectional
C) Case control

Answer 13

C) Case control

Question 14

Cohort study, exposed to factor, physician looking for cases who
developing disease, what is the measurement?
A) Odds ratio
B) Standard error
C) Incidence ratio
D) Prevalence ratio

Answer 14

C) Incidence ratio

Question 15

The duty to provide fair access treatment and intervention:
A) Autonomy
B) Justice
C) Beneficence
D) Maleficence

Answer 15

B) Justice

Question 16

Medical errors mean:
A) Ignorance
B) Wrong diagnosis and treatment

Answer 16

B) Wrong diagnosis and treatment

Question 17

Borrowing someone idea or words and failing to document the original:
A) Plagiarism
B) Paraphrasing
C) Editing
D) Writers borrow

Answer 17

A) Plagiarism

Question 18

Pediatric ages 5, 6, 7, 8, 8, 9, 10, 11 the variance s2 = 4, SD:

A) 8 +/- 2
B) 8 +/- 4
C) 9 +/- 2
D) 9 +/- 4

Answer 18

A) 8 +/- 2

Answer: A
Notes:
- Mean = 8
- 4/2 = 2

نجمع ثم نقسم على العدد ثم نقسم على المعامل المعطى

Question 19

When consent in research is waived:
A) Consider not necessary
B) If testes drug is safe
C) Necessary in all situations

Answer 19

A) Consider not necessary

Answer: A
Notes:
- √ Take consent without waives.

Question 20

Measurement of different Wight, the range 75 +/- 10 kg, what is the
proportion of student weighing 65 – 85:

A) 95%
B) 50%
C) 30%
D) 68%

Answer 20

D) 68%

Answer: D
Notes:
- 1 SD = 68%
- 2 SD = 95%
- 3 SD = 99.7%