Radiology Exam 4

What is echogenicity?

appearance of the tissues on ultrasound, based on the ability of the tissues to reflect sound waves
› Refers to the ‘brightness’ of tissues that are being projected in B-mode

What is a cine loop?

Continuous feed that allows AOI to be observed over a period of time

What is B-mode?

B represents brightness of the intensity and speed of returning echo

• 2D image, tissue classified as either hyper or hypoechoic

What is M-mode?

M represents motion

• Displays motion over B-mode

• Useful in eval of the heart, can determine thickness and diameter of ventricular wall

What is Doppler mode?

Images the flow of blood while measuring velocities

• Blue = blood flow away from transducer

• Red = blood flow toward transducer

Color, power color (sensitive to blood flow), pulse wave (small sample volume, peripheral), or continuous wave (high velocity blood flow)

What is harmonic mode?

Penetrating frequencies emitted into body w/ harmonic overtone

• Helpful in obese patients

What does A FAST stand for?

Abdominal Focused Assessment w/ Sonography for Trauma

1. Cavitary effusion

2. Direct stabilization efforts

• Pericardial, peritoneal, and pleural spaces

1. Diaphragmatic-hepatic

2. Splenorenal

3. Cystocolic

4. Hepatorenal

What are 3 transducer types?

1. Linear - Fine detail, high resolution

2. Convex - Wide, good for general scans

3. Photo Array Sector - Cardiac studies

Difference between OFA and PennHip

1. OFA = 2 years or older, Penn = 16 weeks

2. OFA = not mandatory submission, Penn = mandatory

3. OFA = VD extended ± sedation, Penn = VD extended, compression, distraction views + heavy sedation

4. Penn = owned by Antech

What skull view is needed for brachycephalic breeds?

Better image for nasal cavity = closed mouth caudoventral to rostrodorsal oblique w/ hard palate tipped down 30 degrees

T/F The primary beam cannot be centered less than 10cm from the ground in equine/LA

True

T/F For oblique and lateral radiographic views in LA, the proximal end faces up and the dorsal side facing to the left

True

T/F Directional markers should be placed on the lateral aspect of the limb for DP and oblique views and the cranial side for lateral views

True

T/F The DMPLO and DLPMO views are aimed 45 degrees medially and laterally respectively

True