Radiology

Question 1

What is a characteristic appearance of the abdomen on plain radiograph in a patient with ascites?

Answer 1

Hazy picture with no kidney silhouette or psoas margins. Bowel loops are centrally located.

Question 2

What is suspected when a plain radiograph reveals air under the diaphragm?

Answer 2

Pneumoperitonitis most likely caused by bowel perforation.

Question 3

What are the measurements that indicate dilated bowels for:

1. Small Bowel
2. Large Bowel
3. Cecum

Answer 3

1. > 2.5-3cm
2. > 5cm
3. > 8cm

Question 4

Most common type of malignant liver tumor.

Answer 4

Metastatic

Question 5

Method of choice for viewing the gallbladder.

Answer 5

Ultrasound

Question 6

How does HIDA scan reveal gallbladder pathology.

Answer 6

In the absence of disease, the gallbladder is visualized within 1 hour of the injection of the radioactive tracer. If the gallbladder is not visualized within 4 hours after the injection, this indicates either cholecystitis or cystic duct obstruction.

Question 7

Which part of the duodenum has the worst prognosis when lesions are found?

Answer 7

4th part. All lesions are malignant tumors

Question 8

What is the most common neoplasm of the bowel and the best imaging study to observe them?

Answer 8

Carcinoid tumors (tumors that secrete serotonin and kallikrein)

Small bowel follow thru: contrast ingested and images taken at time intervals

Question 9

Imaging method of choice to confirm an appendicitis diagnosis.

Answer 9

CT