NMTCB Anatomy & Physiology for Nuclear Medicine

Question 1

Which coronary artery supplies the lateral wall of the left ventricle and is most commonly assessed in myocardial perfusion imaging?

Accepted Answer

Left circumflex artery (LCx)

Answer

The left circumflex artery (LCx) supplies the lateral wall of the left ventricle, and perfusion defects in this territory appear on the lateral wall in myocardial perfusion studies.

Question 2

In a thyroid uptake study, which anatomical structure must be identified to ensure the probe is correctly positioned over the thyroid?

Accepted Answer

Thyroid cartilage (Adam's apple)

Answer

The thyroid cartilage (Adam's apple) is used as the key anatomical landmark to center the uptake probe over the thyroid gland.

Question 3

During a renal scan, tracer is seen accumulating in the renal pelvis with delayed drainage. Which anatomical structure is the likely site of obstruction?

Accepted Answer

Ureteropelvic junction (UPJ)

Answer

Obstruction at the ureteropelvic junction (UPJ) prevents drainage from the renal pelvis, causing tracer retention seen on MAG3 or DTPA renal scans.

Question 4

Which lung lobe is located in the right lower zone and is supplied by the right lower lobe bronchus, commonly assessed in V/Q scans?

Accepted Answer

Right lower lobe

Answer

The right lower lobe is the largest lobe of the right lung and is commonly implicated in pulmonary emboli detected by V/Q scanning.

Question 5

In hepatobiliary imaging, which sphincter controls bile flow from the common bile duct into the duodenum?

Accepted Answer

Sphincter of Oddi

Answer

The sphincter of Oddi regulates bile and pancreatic juice flow into the duodenum; dysfunction causes impaired biliary drainage seen on HIDA scans.

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

(NMTCB) Nuclear Medicine Technology Certification Board Practice Test

NMTCB Anatomy & Physiology for Nuclear Medicine