Test Your Ultrasound Knowledge

1. When performing an abdominal ultrasound, which transducer frequency is most appropriate for imaging deep abdominal structures in a large-breed dog?
A high-frequency linear transducer (10–15 MHz)
A mid-frequency curvilinear transducer (5–8 MHz)
A phased array transducer (5–8 MHz)
Frequency does not affect image quality in abdominal scanning
2. Which of the following is the correct technique for assessing the spleen on abdominal ultrasound?
Place the transducer in the right lateral intercostal space with the patient in dorsal recumbency
Use a sagittal and left intercostal approach from the left cranial abdomen with the patient in dorsal or right lateral recumbency
Only image the splenic head, as the body and tail are not reliably visualized
Increase transducer pressure to improve contact with the abdominal wall
3. True or False: The presence of a clean acoustic shadow deep to a structure suggests the presence of mineralization or calculi.
True
False
4. A 7-year-old intact female DSH presents for lethargy and polyuria/polydipsia. On ultrasound, you identify a tubular structure between the urinary bladder and colon with a thickened, irregular wall, containing echogenic fluid. What is the most likely diagnosis?
Normal gravid uterus
Hydroureter secondary to urolithiasis
Pyometra
Intestinal intussusception
5. Which of the following best describes the normal sonographic appearance of the canine liver?
Hypoechoic compared to the spleen, with well-defined vascular margins
Isoechoic to the spleen and hyperechoic to the renal cortex, with visible portal and hepatic vessels
Hypoechoic compared to surrounding fat, with diffuse nodular texture
Echogenicity is not a reliable parameter for hepatic evaluation
6. True or False: Anisotropy is an artifact unique to musculoskeletal imaging and does not affect abdominal soft tissue ultrasound.
True
False
7. During scanning, image quality degrades despite optimal machine settings. Which transducer technique adjustment is most likely to improve your image?
Increase the depth setting to capture more tissue
Apply more coupling gel and adjust the angle of insonation to achieve perpendicular contact
Decrease the frequency
Reduce the gain to eliminate artifact
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