t/f

1. 1. Humans are exposed to ionizing radiation
from natural resources:
• A. FALSE
• B. TRUE

2. 2. Children are more susceptible to ionizing
radiation than adults:
• A. FALSE
• B. TRUE

3. 3. The organogenesis phase during pregnancy
is the most susceptible to radiation effects:
• A. FALSE
• B. TRUE

4. 4. X-rays travel in wavy lines and are attenuated
according to density and thickness of body tissues:
• A. FALSE
• B. TRUE

5. 5. MRI scanners produce magnetic fields that
interacts with the electrons in the body:
• A. FALSE
• B. TRUE

6. 6. The closer the object from an Xray film, the
more an object is magnified
• A. FALSE
• B. TRUE

7. 7. The further the object from an Xray film,
the more an object is magnified
• A. FALSE
• B. TRUE

8. 8. Ultrasound can be used to find fractures
with high specificity and sensitivity:
• A. FALSE
• B. TRUE

9. 9. Higher position of the right hilum versus
the left hilum is pathological:
• A. FALSE
• B. TRUE

10. 10. Poor inspiratory effort/result makes the
diaphragm and heart appear enlarged:
• A. FALSE
• B. TRUE

11. 11. The chest xray is the most sensitive xray
study to detect pneumoperitoneum:
• A. FALSE
• B. TRUE

12. 12: The “C” in PACS stands for
“Computation”:
• A. FALSE
• B. TRUE

13. 13. The bone is the most radio-opaque
among the radiographic densities:
• A. FALSE
• B. TRUE

14. 14. The most anterior of the four chambers is
the right atrium:
• A. FALSE
• B. TRUE

15. 15. Air has zero Hounsfield Unit:
• A. FALSE
• B. TRUE

16. 16. Water has zero Hounsfield Unit:
• A. FALSE
• B. TRUE

17. 17. In chest postero-anterior (PA) view, the
normal cardiothoracic ratio (CTR) is <50%:
• A. FALSE
• B. TRUE

18. 18. In chest antero-posterior (AP) view, the
normal cardiothoracic ratio (CTR) is <57%:
• A. FALSE
• B. TRUE

19. 19. Only about 15% of urinary calculi are
visible on conventional radiology:
• A. FALSE
• B. TRUE

20. 20. Only about 15% of gallstones contain sufficient
calcium to be identified on conventional radiology:
• A. FALSE
• B. TRUE

21. 21. A 6 cm cecum is considered dilated:
• A. FALSE
• B. TRUE

22. 22. Most colonic obstructions occur in the cecum
where the bowel lumen is narrower and the stool
is more formed:
• A. FALSE
• B. TRUE

23. 23. Fecal impaction is the MCC of large bowel
obstruction in elderly and bedridden patients:
• A. FALSE
• B. TRUE

24. 24: MRI is considered the gold standard for
evaluating cardiac function:
• A. FALSE
• B. TRUE

25. 24: Metastases are the most common
malignant masses in the liver:
• A. FALSE
• B. TRUE

26. ANSWER KEY:
1. T
2. T
3. T
4. F
5. F
6. F
7. T
8. T
9. T
10. T
11. T
12. F
13. F
14. F
15. F
16. T
17. T
18. T
19. F
20. T
21. F
22. F
23. T
24. T
25. T