BASIS of Ultrasound

Question 1

Piezoelectric effect

Answer 1

Mechanical vibration caused by pulse o electricity , through a set of crystals

Question 2

Acoustic velocity

Answer 2

THE SPEED AT WHICH A SOUND WAVE TRAVELS
THROUGH A MEDIUM. (SPEED IS DETERMINED BY THE
DENSITY/STIFFNESS OF THE MEDIUM)

Question 3

Hypoechoic

Answer 3

Gray or darker

Question 4

Hyperechoic

Answer 4

more echogenic
WHITE<
muscle, fascia

Question 5

In plane

Answer 5

Short axis

Question 6

out of plane

Answer 6

long axis

Question 7

out of plane

Answer 7

long axis
THIS INVOLVES THE NEEDLE INSERTION
PERPENDICULAR TO THE TRANSDUCER. THE NEEDLE IMAGE IS OF THE “CROSS-SECTION” VIEW ONLY.

Question 8

IN plane technique

Answer 8

IN PLANE TECHNIQUE MEANS THE NEEDLE IS PLACED IN THE SAME PLANE AS THE US BEAM; AS A RESULT, THE NEEDLE SHAFT AND TIP MAY BE VISUALIZED IN THE LONGITUDINAL VIEW IN A “REALTIME” SITUATION. IF IMAGE OF THE NEEDLE IS LOST….STOP ANY
ADVANCEMENT UNTIL THE IMAGE IS RECOVERED!

Question 9

IS THE FIRST CONSIDERATION WHEN PERFORMING USGRA.

Answer 9

THE DEPTH OF THE NERVE

Question 10

US is high frequency sound refers to mechanism vibrations above

Answer 10

20Khz

Question 11

Period

Answer 11

time in takes for one cycle to occur