mix

Question 1

which radiographic device shows real-time images by sending sound waves into the body which then bounces back to create an image?

Answer 1

u/s

Question 2

why can’t u/s capture images of lung or bones?

Answer 2

bcz lungs are filled with air, which is not a good medium for sound waves to be transmitted in;
and bones are so dense & calcified, they strongly reflect the waves

Question 3

What is the source of image data in CT?

Answer 3

Difference of Attenuation of radiofrequency signals

Question 4

What is the source of image data in MRI ?

Answer 4

Relaxation time of excited hydrogen atoms in the tissue

Question 5

List most resistant tissues to least resistent

Answer 5

Tissue cells[bone& nervous syst]
Blood vessels
Skin cells
Reproductive organ cells
Digestive syst cells
Red blood cells
White blood cells

Question 6

Which radiation is non-ionizing?

Answer 6

MRI and U/S

Question 7

CT number=

Answer 7

Hounsfield unit

Question 8

How does MRI work?

Answer 8

The hydrogen inside the body are excited by RF pulse then after relaxation we receive the signal from H+ relaxation time

Question 9

What is inside the superconductive magnet in MRI?

Answer 9

Helium and nitrogen

Question 10

When losing ur superconductivity means losing the magnetic field which leads to…?

Answer 10

QUENCH

Question 11

**Before which radiographic tests do you ask for blood creatine levels?

Answer 11

Before performing angiography and iodinated contrast CT

Question 12

Anterior contour of heart=

Answer 12

Right ventricle

Question 13

Posterior contour of heart=

Answer 13

Left atrium &left ventricle

Question 14

Cardiac enlargement is over what %?

Answer 14

> 50%

Question 15

When do you ask for a CT or MRI for heart pathology[indications]?

Answer 15

Cardiac tumor, thrombus, calcification,
Myocardial perfusion
Demostration of coronary arteries

Question 16

When to do chest x-ray for pericardial effusion?

Answer 16

Symptomatic: Must be 200-300ml of fluid collected

Question 17

**For vessels [s.a thoracic/abdominal Aorta] dx?

Answer 17

CTA

Question 18

For vessels [s.a thoracic/abdominal Aorta] Tx?

Answer 18

catheter angiography DSA

Question 19

**Supra-aortic arteries;carotid or subclavian a. [superficial vessels] diagnosis?

Answer 19

Doppler U/S

Question 20

What are the DVT symptoms?

Answer 20

1-resting pain
2-pink leg
3-swelling
4-ulceration &bleeding
5-petechia
6-edema &swelling
7-bruising

Question 21

PAD[acute arterial ischemia] Tx?

Answer 21

Endovascular tx

Question 22

Which radiograph examination do you perform when suspecting ileus(hypo-active bowel)?

Answer 22

ERECT[POSITION] ABDOMINAL RADIOGRAPH

Question 23

What is the indication for Erect abdominal radiography?

Answer 23

***Ileus (Hypo-active bowel)
Air-fluid levels