4 Imaging programs
4.11 Selecting resolution and FOV
The resolution selection has an effect to the image quality and to the patient dose. For
example High resolution will give better image quality than Standard resolution, but on
the other hand the patient dosage is also higher. The unit offers a Low Dose Technology
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(LDT) resolution (see table 1 below) which can be used for example in treatment follow-
up cases. The LDT resolution will result in images of reduced image quality (in other
words image quality is proportional to dose) and it is up to the dental professional to
decide when it is sufficient to use this mode.
To follow the ALARA (As Low As Reasonably Achievable) principle, always use the
smallest possible FOV size for the patient case.
NOTICE!
Blurring can occur on the upper corners of the cylinderical 3D volume.
Nevertheless, the best possible image quality relative to the selected resolution is
presented.
3D Resolution setting
General recommendations for the use
LDT resolution
Treatment follow up, children
Standard resolution
Implants, 3rd molars, TMJ, impacted teeth, resorptions
High resolution
Pathologies, alveolar bone defects, root fractures
Endo resolution
Endodontic cases (periapical infections, root canals,
fractures, etc.)
3D FOV selection
General recommendations for the use
61 x 41 mm
50 x 50 mm
Optimized for single site implants or localized diagnostics,
for example 3rd molar extractions, impacted teeth´s,
single TMJ analysis, endodontics, and children.
61 x 78 mm
Multiple implant placement using surgical guides, covers
complete dental arch, optimized for one jaw.
78 x 78 mm
Entire dentition, both mandibula and maxilla as well as a
portion of maxillary sinus.
78 x 150 mm
Both mandibula and maxilla including airway and upper
cervical spine or the sinus, both TM joints.
130 x 150 mm (optional)
Covers entire maxillofacial region, from maxilla to frontal
sinus or from mandibula to maxillary sinus.
4.12 3D Automatic Dose Control (ADC)
With OP 3D Pro medium panel units, it is possible to take CBCT exposure with Automatic
Dose Control with Endo, High and Standard resolutions. With Low Dose resolution 3D
ADC cannot be utilized.
When ADC for 3D is selected, one short (0.1 ms) projection shot is taken in PA direction
in the beginning of imaging sequence to automatically set the exposure factors for
proper dose. After the exposure, the adjusted values are shown on the display.
The 3D ADC will stay engaged unless set to manual mode. The signal to noise ratio can
be adjusted while keeping ADC engaged. Adjustment is done from the GUI service menu.
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ORTHOPANTOMOGRAPH
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OP 3D Pro