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4.8 Ensuring Image Quality
The following NOMAD Pro 2 features contribute to high image quality:
• DC voltage X-ray generation is efficient in delivering energy at the level optimized for
diagnostics, with shorter exposure times required.
• The smaller the focal spot, the better the resolution. The NOMAD Pro 2 has a small
0.4mm focal spot.
• Absorption of scatter by the NOMAD Pro 2 backscatter shield reduces incidence of
noise for the image receptor, which tends to increase image contrast.
Motion during Exposures
As with the suspended tubehead of a conventional wall-mounted X-ray system, some
motion of the tubehead during actual exposures is possible. Use both hands to hold the
NOMAD Pro 2 during the exposure and keep steady. The pistol-grip style is ideal for
keeping hands behind the backscatter shield, positioning and aiming (with line of sight
through the clear shield) so as to achieve a quality image and avoid cone-cutting or
retakes.
Image degradation or blurriness does not result due to motion of the handheld X-ray
source.
2
Time Settings, Sensors, and Complete Exposures
To ensure image quality, use correct time settings. The NOMAD Pro 2 comes with pre-sets
to give you a starting point. However, these time settings can be adjusted to achieve the
desired image quality and then saved for future use. See
Section 4.10 Settings Menu for
further help.
The NOMAD Pro 2 works with the fastest sensor technologies in the market to assure that
exposure times are as short as possible, also limiting any effects of motion.
Make sure you are as close to the patient’s cheek as possible without touching. If your
sensor holder prevents you from getting close enough, check with your dental supplier to
find a NOMAD-friendly holder. You can also trim the rod length of your holder, enabling
the NOMAD Pro 2 to be placed directly against the positioning ring.
Always double-check for the Incomplete Exposure alarm on the NOMAD Pro 2 display.
The Incomplete Exposure alarm indicates that the trigger was released prematurely,
resulting in an incomplete exposure. To achieve complete exposures, do the following:
quickly press and release the trigger to enable the X-ray and wait for the device to shift to
the Ready state; press and hold the trigger until the audible tones and the display indicate
the X-ray Complete alert.
2 Third-party studies available upon request. Journal Of the Michigan Dental Association – February 2009 – Brooks SL,
McMinn WE, Benavides E., University of Michigan, Ann Arbor, MI, USA; Gammasonics Institute for Medical Research –
April 2006 – Bruce Waters, Senior Radiographer, Westmead Center for Oral Health, Westmead Hospital, NSW Australia;
University of Texas, San Antonio – Sept. 2006 – Robert P. Langlais, DDS, MS, Director, Graduate OMF Radiology, San
Antonio, TX, USA; Guy’s And St. Thomas’ Hospital Trust – January 2009 – Rosemary Eaton, Physicist, Guy’s And St.
Thomas’ Hospital Trust, London England, UK; Clinical Research Associates (CRA) Foundation – October, 2006 – Clinical
Research Associates (CRA) Foundation, Provo, UT, USA.
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