Intro to UTZ PART 2 Flashcards
1
Q
The product of ACOUSTIC PRESSURE to particle VELOCITY at any point in the acoustic field.
A
ACOUSTIC IMPEDANCE
2
Q
HIGH DENSITY SUBSTANCES = ?
A
HIGH ACOUSTIC IMPEDANCE
3
Q
LOW DENSITY SUBSTANCES = ?
A
LOW ACOUSTIC IMPEDANCE
4
Q
FORMULA = ACOUSTIC IMPEDANCE
A
Z = pc
5
Q
p = ?
A
DENSITY OF MATERIAL
6
Q
c = ?
A
SPEED OF SOUND
7
Q
Z = ?
A
ACOUSTIC IMPEDANCE
8
Q
RANGE OF FREQUENCIES contained w/in an UTZ pulse
A
BANDWITH
9
Q
WIDE BANDWIDTH (2)
A
SHORTER SPATIAL PULSE LENGTH
10
Q
WIDE BANDWIDTH (2)
A
WIDER RANGE OF FREQUENCY
11
Q
NARROW BANDWIDTH (2)
A
LONGER SPATIAL PULSE LENGTH
12
Q
NARROW BANDWIDTH (2)
A
NARROWER RANGE OF FREQUENCY
13
Q
affects the UTZ image
A
FREQUENCY
14
Q
HIGHER FREQUENCY (4)
A
- SHORTER WAVELENGTH
15
Q
HIGHER FREQUENCY (4)
A
- BETTER RESOLUTION
16
Q
HIGHER FREQUENCY (4)
A
3.LOWER PENETRATION
17
Q
HIGHER FREQUENCY (4)
A
- HIGHER ABSORPTION
18
Q
LOWER FREQUENCY (4)
A
- LONGER WAVELENGTH
19
Q
LOWER FREQUENCY (4)
A
- POOR RESOLUTION
20
Q
LOWER FREQUENCY (4)
A
- HIGHER PENETRATION
21
Q
LOWER FREQUENCY (4)
A
- LOWER ABSORPTION
22
Q
MORE READILY SCATTERED
A
HIGHER FREQUENCY
23
Q
FOR SUPERFICIAL STRUCTURES
A
HIGHER FREQUENCY
24
Q
LESS LIKELY SCATTERED
A
LOWER FREQUENCY
25
FOR DEEPER STRUCTURES
LOWER FREQUENCY
26
2 DISTINCT UTZ BEAM PATTERN
NEAR FIELD
27
2 DISTINCT UTZ BEAM PATTERN
FAR FIELD
28
NEARFIELD AKA ____
FRESNEL ZONE
29
A SLIGHTLY CONVERGING BEAM OUT TO A DISTANCE
NEARFIELD
30
ADJACENT TO THE TRANSDUCER FACE
NEARFIELD
31
NEARFIELD DETERMINED BY
1. GEOMETRY OF THE TRANSDUCER
32
NEARFIELD DETERMINED BY
2. FREQUENCY OF THE TRANSDUCER
33
LARGE TRANSDUCER SURFACE AS AN INFINITE NUMBER OF POINT SOURCES OF SOUND ENERGY WHERE EACH POINT IS CHARACTERIZED AS RADIAL EMITTER
HUYGEN'S PRINCIPLE
34
INCREASED PHYSICAL TRANSDUCER DIAMETER = ?
INCREASES NEARFIELD DISTANCE
35
INCREASED TRANSDUCER FREQUENCY = ?
INCREASES NEARFIELD DISTANCE
36
THE ABILITY OF THE SYSTEM TO RESOLVE OBJECTS IN A DIRECTION L TO THE BEAM DIRECTION
LATERAL RESOLUTION
37
LATERAL RESOLUTION: BEST AT THE ___
END OF THE NEARFIELD FOR A SINGLE ELEMENT TRANSDUCER
38
LATERAL RESOLUTION: POOR IN ___
AREAS CLOSE TO AND FAR FROM THE TRANSDUCER SURFACE
39
LATERAL RESOLUTION DEPENDENT ON
BEAM DIAMETER
40
WHERE THE BEAM DIVERGES
FAR FIELD/ FRAUNHOFER ZONE
41
HIGHER FREQUENCY TRANSDCER
LESS BEAM DIVERGENCE
42
LARGE BEAM DIAMETER = ?
LESS BEAM DIVERGENCE
43
HIGH FREQUENCY = ___ NEAR FIELD DISTANCE
LONGER
44
HIGH FREQUENCY = ___ FAR FIELD DIVERGENCE
LESS
45
LOW FREQUENCY = ___ NEAR FIELD DISTANCE
SHORTER
46
LOW FREQUENCY = ___ FAR FIELD DIVERGENCE
MORE
47
WIDE CRYSTAL DIAMETER = _____ NEAR FIELD DISTANCE
SHORTER
48
WIDE CRYSTAL DIAMETER = _____ FAR FIELD DIVERGENCE
LESS
49
NARROW CRYSTAL DIAMETER = _____ NEAR FIELD DISTANCE
LONGER
50
NARROW CRYSTAL DIAMETER = _____ FAR FIELD DIVERGENCE
MORE
51
THIN CRYSTAL = _____ NEAR FIELD DISTANCE
DECREASED
52
THIN CRYSTAL = _____ FAR FIELD DIVERGENCE
MORE
53
THICK CRYSTAL = _____ NEAR FIELD DISTANCE
INCREASED
54
THICK CRYSTAL = _____ FAR FIELD DIVERGENCE
LESS
55
A DEVICE WHICH CONVERTS ONE FORM OF ENERGY TO ANOTHER
TRANSDUCER/PROBE
56
TRANSDUCER: CERAMIC ELEMENT
PIEZOELECTRIC CRYSTALS
57
CONVERTS ELECTRICAL ENERGY TO MECHANICAL ENERGY
TO PRODUCE UTZ
58
CONVERTS MECHANICAL ENERGY TO ELECTRICAL ENERGY
FOR UTZ DETECTION
59
TRANSDUCER/PROBE: PURPOSE (2)
1. TRANSMIT UTZ BEAM
60
TRANSDUCER/PROBE: PURPOSE (2)
2. RECEIVE REFLECTED ECHOES
61
MAJOR COMPONENTS OF TRANSDUCER (8)
1. PIEZOELECTRIC MATERIALS
62
MAJOR COMPONENTS OF TRANSDUCER (8)
2. MATCHING LAYER
63
MAJOR COMPONENTS OF TRANSDUCER (8)
3. BACKING BLOCK
64
MAJOR COMPONENTS OF TRANSDUCER (8)
4. ACOUSTIC ABSORBER
65
MAJOR COMPONENTS OF TRANSDUCER (8)
5. INSULATING COVER
66
MAJOR COMPONENTS OF TRANSDUCER (8)
6. TURNING COIL
67
MAJOR COMPONENTS OF TRANSDUCER (8)
7. SENSOR ELECTRODES
68
MAJOR COMPONENTS OF TRANSDUCER (8)
8. TRANSDUCER HOUSING
69
FUNCTIONAL COMPONENT OF TRANSDUCER
PIEZOELECTRIC MATERIALS
70
THICKER PIEZOELECTRIC ELEMENTS = ?
LOW FREQUENCY OF OSCILLATION
71
THINNER PIEZOELECTRIC CRYSTALS = ?
HIGH FREQUENCY OF OSCILLATION
72
PIEZEIN MEANS "____"
PRESS OR PRESSURE
73
ABILITY OF A MATERIAL TO GENERATE ELECTRICAL CHARGE IN RESPONSE TO APPLIED PRESSURE
PIEZOELECTRIC EFFECT
74
PIEZOELECTRIC EFFECT BY ___
JACCQUES AND PIERRE CURIE
75
SANDWICH B/N THE PIEZOELECTRIC CRYSTALS AND THE PX
IMPEDANCE MATCHING LAYER
76
IMPEDANCE MATCHING LAYER: PURPOSE (3)
1. TO IMPROVE TRANSMISSION INTO THE BODY
77
IMPEDANCE MATCHING LAYER: PURPOSE (3)
2. PROVIDES INTERFACE B/N RAW TRANSDUCER ELEMENT AND THE TISSUE
78
IMPEDANCE MATCHING LAYER: PURPOSE (3)
3. MINIMIZES THE ACOUSTIC IMPEDANCE DIFFERENCES B/N THE TRANSDUCER AND THE PX
79
LAYERED ON THE BACK OF PIEZOELECTRIC ELEMENT
DAMPING BLOCK
80
DAMPING BLOCK PURPOSE (4)
1. ABSORBS THE BACKWARD DIRECTED UTZ ENERGY
81
DAMPING BLOCK PURPOSE (4)
2. ATTENUATES THE STRAY UTZ SIGNALS FROM THE HOUSING
82
DAMPING BLOCK PURPOSE (4)
3. DAMPENS THE TRANSDUCER VIBRATION "RING DOWN"
83
DAMPING BLOCK PURPOSE (4)
4. CONTROLS THE LENGTH OF VIBRATIONS FROM THE FRONT FACE
84
IMPROVES AXIAL RESOLUTION
DAMPING BLOCK
85
DAMPING BLOCK: COMPOSITION (4)
1. PLASTIC OR EPOXY RESIN
86
DAMPING BLOCK: COMPOSITION (4)
2. CORK
87
DAMPING BLOCK: COMPOSITION (4)
3. RUBBER
88
DAMPING BLOCK: COMPOSITION (4)
4. ARALDITE LOADED W/ TUNGSTEN POWDER
89
CONTAINS ALL INDIVIDUAL COMPONENT
PHYSICAL HOUSING
90
ACTS AS AN ELECTRICAL AND ACOUSTIC INSULATOR
PHYSICAL HOUSING
91
REDUCE THE BEAM WIDTH OF THE TRANSDUCER
ACOUSTIC LENS
92
IMPROVES THE IMAGE RESOLUTION
ACOUSTIC LENS
93
DETERMINES THE LATERAL RESOLUTION
WIDTH OF THE BEAM
94
ACOUSTIC LENS COMPOSITION (3)
1. ALUMINUM
95
ACOUSTIC LENS COMPOSITION (3)
2. PERSPEX
96
ACOUSTIC LENS COMPOSITION (3)
3. POLYSTYRENE
97
TRANSDUCER ARRAYS (4)
1. LINEAR ARRAY
98
TRANSDUCER ARRAYS (4)
2. PHASED ARRAY
99
TRANSDUCER ARRAYS (4)
3. CURVILINEAR ARRAY
100
TRANSDUCER ARRAYS (4)
4. CONVEX TRANSDUCER
101
FREQUENCY ABOVE 4 MHz
LINEAR ARRAY TRANSDUCER
102
256-512 ELEMENTS
LINEAR ARRAY TRANSDUCER
103
LINEAR ARRAY : ____ FOV
RECTANGULAR
104
LINEAR ARRAY : ____ SCAN LINES
PARALLEL
105
FOR VASCULAR, SMALL PARTS, MUSKOSKELETAL APPLICATIONS
LINEAR ARRAY
106
64-128 ELEMENTS
PHASED ARRAY
107
PHASED ARRAY : ___ FOV
WIDE
108
PHASED ARRAY: APPLICATION (2)
1. CARDIAC UTZ
109
PHASED ARRAY: APPLICATION (2)
2. CRANIAL UTZ
110
FREQUENCY: 3.5 MHz
SECTOR/CURVILINEAR ARRAY
111
SECTOR/CURVILINEAR ARRAY: ___ FOV
TRAPEZOIDAL "WIDE"
112
SECTOR/ CURVILINEAR ARRAY : APPLICATION (2)
1. ABDOMINAL
113
SECTOR/ CURVILINEAR ARRAY : APPLICATION (2)
2. OBSTETRIC SCANNING
114
WIDE FAN-SHAPED
CONVEX TRANSDUCER
115
CONVEX: USEFUL FOR ALL PARTS OF THE BODY EXCEPT ___
ECHOCARDIOGRAPHY
