Sound Beam's

Question 1

Near zone is known as?

Answer 1

Fresnel

Question 2

Farmers own is known as?

Answer 2

Fraunhofer

Question 3

Imaging is better in the

Answer 3

Near field

Question 4

Imaging worsens in the

Answer 4

Far field

Question 5

Focal depth or focal length formula is?

Answer 5

FL= ap^2 x operat freq/ 4 x C

Question 6

In the focal beam lower frequency transducer has

Answer 6

Shallow focus

Question 7

In the focal beam higher frequency has

Answer 7

Deeper Focus

Question 8

In the focal beam the lower transducer diameter equals

Answer 8

Shorter focal length

Question 9

In the focal beam the increase of a transducer diameter has a

Answer 9

Local focal length

Question 10

Focal depth changes the

Answer 10

Diameter of the crystal

Question 11

What is Huygen’s principle?

Answer 11

Constructive and deconstructive interference of wavelets.

Hourglass shaped

Question 12

High-frequency transducer improves both

Answer 12

Lateral and longitudinal resolution

Question 13

Higher frequency transducers produce less divergent (narrow) sound be in

Answer 13

Ford Field

Question 14

Lower frequency transducers produce wider divergent sound beam in the

Answer 14

Far field

Question 15

Focusing is created at the

Answer 15

Narrowing of the beam

Question 16

Focusing improves what type of resolution?

Answer 16

Lateral

Question 17

Focus is mainly affected in the

Answer 17

NZL

Focal zone

Question 18

Can fixed Focus be adjusted by the sonographer

Answer 18

No

Question 19

Electronic focusing is used by what kind of transducers?

Answer 19

Phased array

Question 20

Electronic focusing is also known as?

Answer 20

Dynamic Focus or transmission zone

Question 21

What are the two types of scanning?

Answer 21

Mechanical scanning

electronic scanning

Question 22

what is Mechanical scanning?

Answer 22

Transducer with single crystals circular disc shaped crystals that are physically moved or rotated through a scanner pathway