X-Ray Machine Assessment by Mail

The state Department of Public Health Radiologic Health Branch has mailed to some (not all) dental offices a new screening device, the DIQUAD Analyzer, for mandated inspections of dental radiographic machines. In the past, the agency has sent thermoluminescence devices to dental offices, asked the offices to expose them and then return the devices for analysis. The DIQUAD Analyzer is the successor technology to the old devices.

The DIQUAD Analyzer is able to provide to the agency additional metrics besides estimated patient dose. The agency will compare the results of each analyzer with established standards. Dental offices that have screening results that greatly deviate from the standards will be scheduled for on-site inspections. The state is required to inspect radiographic equipment every five years and anticipates mailing out 3,000 Analyzers in 2009.

Dental offices will receive the Analyzers in envelopes sent from DIQUAD. Each office also will receive a letter on California Department of Public Health RHB letterhead that explains the screening program, gives instructions for using the Analyzer, and provides a postage-paid envelope for returning the Analyzer. Additional information on the DIQUAD Analyzer can be found on the company Web site, diquad.com/Services.html. 

An on-site inspection of dental radiographic equipment is designed to evaluate compliance with radiation protection laws and regulations. The inspection includes measurements such as kVp, timer, exposure and filtration. Processing evaluation and radiation protection procedures — posting of required documentation, patient and worker protection procedures — is also part of the inspection. From the inspection, recommendations are made to correct identified deficiencies. A typical recommendation includes ways to lower patient and worker exposure. A notice of violation may be issued if violations are found.

Dental offices that receive this device must use it and return it as instructed.  In most instances, this assessment replaces an on-site inspection.  Do not throw away the device.  For additional information, see this Web site, ww2.cdph.ca.gov/certlic/radquip/Pages/RadiologicEquipment.aspx.