|
NEWTOM 3G CBCT TOMOGRAFİ CİHAZI DOZ DEKLARASYONU
( CBCT = Cone Beam Volumetric Tomografy )
Technique |
Effective
Dose in
uSv - 1990
ICRP
tissue
weights |
Dose as
multiple
of single
Panoramic
Dose
(ICRP-1990)
|
Dose in
days of
per capita
background
dose |
Dose in
terms of
% medical
CT
equivalent |
Dose in
terms of
% annual
per capita
background
dose |
NewTom3G - Full (12”) FOV*
|
45 |
7 |
4 |
2,1% |
1,2% |
NewTom3G - chin tilt & Thyroid Shield*
|
28 |
4 |
3 |
1,3% |
0,8% |
CB Mercuray - F (12”) FOV 10 mA-100 kV*
|
477 |
74 |
48 |
22,7% |
13,2% |
CB Mercuray - P (9”) FOV*
|
289 |
45 |
29 |
13,8% |
8,0% |
CB Mercuray - I (6”) FOV (maxillary)*
|
169 |
26 |
17 |
12,0% |
4,7% |
CB Mercuray - I (6”) FOV w/ chin tilt*
|
125 |
19 |
12 |
5,9% |
3,5% |
i-CAT - Full (12”) FOV*
|
135 |
21 |
13 |
6,4% |
3,7% |
i-CAT - chin tilt & thyroid shield*
|
57 |
9 |
6 |
2,7% |
1,6% |
Panormic (OrthoPhos Plus DS)†
|
6 |
1 |
1 |
0,3% |
0,2% |
CT Maxillo-Mandibular‡
|
2100 |
385 |
243 |
100,0% |
58,3% |
CT Maxillary‡
|
1400 |
164 |
103 |
100,0% |
38,9% |
*Ludlow JB, Davies-Ludlow LE, Brooks,
SL, Howerton B. Dosimetry of 3 CBCT Units for Oral and Maxillofacial
Radiology. Abstract accepted for 15th International Congress of the
International Association of Dento-Maxillo-Facial Radiology, Cape
Town, South Africa June 2005.
† Ludlow JB, Davies-Ludlow
LE, Brooks, SL. Dosimetry of two extraoral direct digital imaging
devices: NewTom cone beam CT and Orthophos Plus DS panoramic unit.
Dentomaxillofacial Radiology 2003;32:229-34
‡ Ngan DC, Kharbanda
OP, Geenty JP, Darendeliler MA. Comparison of radiation levels from
computed tomography and conventional dental radiographs. Aust Orthod
J. 2003;19:67-75 |
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