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result sql = Feasibility of low-tube-voltage excretory phase images during CT urography: assessment using a dual-energy CT scanner.
Feasibility of low-tube-voltage excretory phase images during CT urography: assessment using a dual-energy CT scanner.
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char = a;code = 97
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = (;code = 40
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = W;code = 87
char = i;code = 105
char = l;code = 108
char = c;code = 99
char = o;code = 111
char = x;code = 120
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = (;code = 40
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = M;code = 77
char = c;code = 99
char = N;code = 78
char = e;code = 101
char = m;code = 109
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = s;code = 115
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = R;code = 82
char = E;code = 69
char = S;code = 83
char = U;code = 85
char = L;code = 76
char = T;code = 84
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = -;code = 45
char = k;code = 107
char = V;code = 86
char = p;code = 112
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = y;code = 121
char = i;code = 105
char = e;code = 101
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = p;code = 112
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = l;code = 108
char = v;code = 118
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
char = );code = 41
char = ;;code = 59
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
char = );code = 41
char = ;;code = 59
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
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char = (;code = 40
char = 5;code = 53
char = .;code = 46
char = 2;code = 50
char = ;code = 32
char = v;code = 118
char = s;code = 115
char = ;code = 32
char = 1;code = 49
char = 1;code = 49
char = .;code = 46
char = 9;code = 57
char = ;code = 32
char = m;code = 109
char = S;code = 83
char = v;code = 118
char = );code = 41
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = t;code = 116
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char = t;code = 116
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = k;code = 107
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = r;code = 114
char = ;code = 32
char = =;code = 61
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 8;code = 56
char = 6;code = 54
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = -;code = 45
char = k;code = 107
char = V;code = 86
char = p;code = 112
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = );code = 41
char = .;code = 46
char = ;code = 32
char = Q;code = 81
char = u;code = 117
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
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char = o;code = 111
char = p;code = 112
char = a;code = 97
char = c;code = 99
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char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = b;code = 98
char = l;code = 108
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = -;code = 45
char = k;code = 107
char = V;code = 86
char = p;code = 112
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = =;code = 61
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 2;code = 50
char = );code = 41
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = l;code = 108
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = -;code = 45
char = k;code = 107
char = V;code = 86
char = p;code = 112
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 0;code = 48
char = 1;code = 49
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char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = o;code = 111
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char = e;code = 101
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
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char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = s;code = 115
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char = m;code = 109
char = i;code = 105
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = .;code = 46
char = ;code = 32
char = O;code = 79
char = f;code = 102
char = ;code = 32
char = 4;code = 52
char = 2;code = 50
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char = u;code = 117
char = r;code = 114
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char = n;code = 110
char = a;code = 97
char = r;code = 114
char = y;code = 121
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char = f;code = 102
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
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char = s;code = 115
char = ,;code = 44
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char = 4;code = 52
char = 0;code = 48
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
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char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = -;code = 45
char = k;code = 107
char = V;code = 86
char = p;code = 112
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = <;code = 60
char = ;code = 32
char = 2;code = 50
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char = m;code = 109
char = m;code = 109
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char = c;code = 99
char = a;code = 97
char = l;code = 108
char = y;code = 121
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char = e;code = 101
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = c;code = 99
char = i;code = 105
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
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char = l;code = 108
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
char = ;code = 32
char = g;code = 103
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = e;code = 101
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char = t;code = 116
char = ;code = 32
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = );code = 41
char = .;code = 46
char = ;code = 32
char = O;code = 79
char = f;code = 102
char = ;code = 32
char = 1;code = 49
char = 3;code = 51
char = 7;code = 55
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 3;code = 51
char = 0;code = 48
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
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result sql = OBJECTIVE : The purpose of this study is to assess the feasibility of low-tube-voltage images during excretory phase CT urography.

MATERIALS AND METHODS : In this retrospective study, we examined 70 consecutive CT urograms (35 men and 35 women; mean age, 58.5 years) performed on a dual-energy CT scanner and compared excretory phase images obtained at 80 kVp and 340 mAs with blended images (0.3 × 140 kVp and 80 mAs; and 0.7 × 80 kVp and 340 mAs). Quantitative measurements of urinary system opacification (Hounsfield units), image noise (Hounsfield units), and effective dose (millisieverts) were compared using Student paired t test. Image noise was correlated with patient thickness. Two independent blinded readers qualitatively assessed opacification, image quality (both compared using Wilcoxon test), overall acceptability (compared using McNemar test), and detectability of urinary and extraurinary findings.

RESULTS : The 80-kVp images yielded significantly higher opacification of renal pelvis (p < 0.0001), ureter (p < 0.0001), bladder (p < 0.0001), and aorta (p < 0.0001); higher image noise (p < 0.0001); and lower radiation dose (5.2 vs 11.9 mSv). Image noise increased along with increasing patient thickness (r = 0.86 for 80-kVp images). Qualitative opacification scores were better only in the bladder on 80-kVp images (p = 0.002). Although 80-kVp image quality was lower (p < 0.0001), the overall acceptability was similar. Of 42 urinary findings, 40 were detected on 80-kVp images (< 2-mm calyceal calculus and tiny foci of collecting system gas were missed in one patient each, both large patients). Of 137 extraurinary findings, 130 were detected on 80-kVp images (no findings of high clinical significance were missed).

CONCLUSION : Low tube voltage (80 kVp) during excretory phase CT urography is feasible, with improved urinary system opacification, acceptable image quality, and lower radiation dose.

Publication: AJR Am J Roentgenol 2011 Nov ;197(5)::1146-51. :doi: 10.2214/AJR.11.6799.
Publication Date: 2011 Nov
Study Author(s): Shinagare, Atul B;Sahni, V Anik;Sadow, Cheryl A;Erturk, Sukru M;Silverman, Stuart G;
Institution: Division of Abdominal Imaging and Intervention, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
Shortcut link to this study:
OBJECTIVE : The purpose of this study is to assess the feasibility of low-tube-voltage images during excretory phase CT urography.

MATERIALS AND METHODS : In this retrospective study, we examined 70 consecutive CT urograms (35 men and 35 women; mean age, 58.5 years) performed on a dual-energy CT scanner and compared excretory phase images obtained at 80 kVp and 340 mAs with blended images (0.3 × 140 kVp and 80 mAs; and 0.7 × 80 kVp and 340 mAs). Quantitative measurements of urinary system opacification (Hounsfield units), image noise (Hounsfield units), and effective dose (millisieverts) were compared using Student paired t test. Image noise was correlated with patient thickness. Two independent blinded readers qualitatively assessed opacification, image quality (both compared using Wilcoxon test), overall acceptability (compared using McNemar test), and detectability of urinary and extraurinary findings.

RESULTS : The 80-kVp images yielded significantly higher opacification of renal pelvis (p < 0.0001), ureter (p < 0.0001), bladder (p < 0.0001), and aorta (p < 0.0001); higher image noise (p < 0.0001); and lower radiation dose (5.2 vs 11.9 mSv). Image noise increased along with increasing patient thickness (r = 0.86 for 80-kVp images). Qualitative opacification scores were better only in the bladder on 80-kVp images (p = 0.002). Although 80-kVp image quality was lower (p < 0.0001), the overall acceptability was similar. Of 42 urinary findings, 40 were detected on 80-kVp images (< 2-mm calyceal calculus and tiny foci of collecting system gas were missed in one patient each, both large patients). Of 137 extraurinary findings, 130 were detected on 80-kVp images (no findings of high clinical significance were missed).

CONCLUSION : Low tube voltage (80 kVp) during excretory phase CT urography is feasible, with improved urinary system opacification, acceptable image quality, and lower radiation dose.
PMID: 22021507

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