Quality assurance phantom for digital dental imaging and related method
US8308362B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2010 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Jun 3, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/586
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A quality assurance phantom for intraoral digital dental imaging and related method. The quality assurance phantom measures three different physical properties of an imaging system: dynamic range, contrast detectability, and spatial resolution. The phantom comprises a dynamic range portion having a plurality of steps, each step of the plurality of steps having a different thickness from the other steps; a contrast detail portion having a uniform thickness and a plurality of wells formed therein; a spatial resolution portion having a plurality of line sets, each line set of the plurality of line sets having different line spacing from the other line sets; an attenuating body having uniform thickness positioned between the source and the contrast detail portion and the spatial resolution portion; and a lead mass adjacent to the dynamic range portion.According to the method of the present invention, a series of images is created and analyzed, either manually or automatically with a computer, to determine a baseline quality assurance exposure (BQAE). At subsequent monitoring intervals therefrom, an image is created using the same exposure parameters as the BQAE and compared to the base…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.