Imaging

Question 1

how to ensure XR safety

Answer 1

.

Question 2

mechanism of diagnostic USG

Answer 2

.

Question 3

IVU phases

Answer 3

plain
nephrogram
pyelogram
pre post compression

Question 4

Gy

Sv

unit

Answer 4

absorbed dose J per kg

effective dose

Question 5

background radiation dose to fetus during pregnancy

Answer 5

1mGy

Question 6

what is Hounsfield unit

Answer 6

0

Question 7

mechanism of DECT

Answer 7

dataset
software
color coded

Question 8

uric acid stone on DECT

Answer 8

red

Question 9

CTU

what phases and timing?

Answer 9

30s
80 to 100s
8 to 10min

Question 10

PET scan

mechanism

Answer 10

radiolabelling

Question 11

Bone scan

mechanism

Answer 11

3 to 4hrs

Question 12

68Ga 18F

half life
method of production

Answer 12

68min 109min

generator cyclotron

Question 13

what is PSMA

Answer 13

.

Question 14

what is Lutetium
half life
mean path length

Answer 14

6.7d

Question 15

what is MRI

Answer 15

proton magnetisation

alignment

Question 16

what is T1W

what is T2W

Answer 16

relaxation and relignment into longitudinal plane

transverse plane

Question 17

what is mpMRI

Answer 17

functional sequences

Question 18

what is DWI

Answer 18

Brownian motion of water moelcules

Question 19

what is b-value in MRI

Answer 19

diffusion weighting

Question 20

When to prefer mpMRI over bpMRI

Answer 20

4

Question 21

PROMIS
what is it
results

Answer 21

paired-cohort confirmatory study

NPV 89%

Question 22

PRECISION
what is it
results

Answer 22

noninferiority study
csCA 12% more
insigificant 13% less

Question 23

MRI first study
what is it
results

Answer 23

paired diagnostic study
only systematic miss 8%
only target miss 5%

Question 24

Proportion of csCA according to PIRADS

3 v 4 v 5

Answer 24

10
60
90

Question 25

how to ensure MRI safety

Answer 25

3

Question 26

what is renal scintigraphy

Answer 26

.

Question 27

Half life of 99m-Tc

Answer 27

6hr

Question 28

radiation risk (Sv) MAG3: DMSA:

Answer 28

0.4mSv | 1 - 3mSv

Question 29

DMSA what images are acquired when

Answer 29

A, P, L R PO | 3-4hr

Question 30

what are O'Reilly curves

Answer 30

.

Question 31

what is Whitaker test | what is the cut-off values for the pressure gradient

Answer 31

1973 pressure/perfusion study < 15; > 22 Equivocal 15 - 22

Question 32

what is DEXA scan

Answer 32

.

Question 33

Frequency of TRUS probe

Answer 33

7.5MHz

Question 34

Frequency of abdominal USG probe

Answer 34

3.5MHz

Question 35

Frequency of high-resolution micro USG

Answer 35

29MHz | ExactVu

Question 36

what is mpUSG?

Answer 36

greyscale shearwave elastography CEUSG

Question 37

mpUSG Advantages Disadvantages

Answer 37

0.07mm (microUSG)