Medical Knowledge Diagnostic Procedures & Imaging 2

Question 1

An elevated serum troponin level is most indicative of which condition?

Accepted Answer

Myocardial injury or infarction

Answer

Acute pancreatitis

Answer

Pulmonary embolism

Answer

Acute liver failure

Question 2

Which diagnostic test is considered the gold standard for confirming type 2 diabetes mellitus?

Accepted Answer

Fasting plasma glucose ≥126 mg/dL or HbA1c ≥6.5% confirmed on two occasions

Answer

Random blood glucose measurement alone

Answer

Urine glucose dipstick test

Answer

C-peptide level and insulin resistance index

Question 3

A chest X-ray is most useful for primarily evaluating which structures?

Accepted Answer

Cardiac silhouette, lung fields, and mediastinum

Answer

Brain lesions and intracranial hemorrhage

Answer

Abdominal organ size and bowel obstruction

Answer

Bone density and osteoporosis risk

Question 4

What is the primary diagnostic purpose of a tissue biopsy?

Accepted Answer

To obtain tissue samples for histopathological microscopic analysis

Answer

To measure enzyme activity in the circulating blood

Answer

To visualize internal organ structures in real time

Answer

To assess organ perfusion and regional blood flow

Question 5

Which liver function test is most specific for hepatocellular (liver cell) damage?

Accepted Answer

Alanine aminotransferase (ALT)

Answer

Alkaline phosphatase (ALP)

Answer

Gamma-glutamyl transferase (GGT)

Answer

Total serum bilirubin

Question 6

MRI creates diagnostic images primarily using which physical principle?

Accepted Answer

Strong magnetic fields and radiofrequency pulses interacting with hydrogen nuclei

Answer

High-frequency sound waves reflected from tissue interfaces

Answer

Ionizing X-ray beams attenuated by tissue density

Answer

Radioactive tracer uptake measured by gamma cameras

Question 7

Pulse oximetry is a non-invasive device that measures which parameter?

Accepted Answer

Peripheral arterial oxygen saturation (SpO₂)

Answer

Partial pressure of carbon dioxide (PaCO₂) in arterial blood

Answer

Total hemoglobin concentration in whole blood

Answer

Respiratory rate and tidal volume simultaneously