[FoRK] medical file Re: Aaron does (some of) it for me (re: iPad)
sdw at lig.net
Fri Feb 5 09:34:20 PST 2010
Damien Morton wrote:
> On Thu, Feb 4, 2010 at 6:33 AM, Stephen Williams <sdw at lig.net> wrote:
>> My dentist has color monitors they use for this. Probably not 16 bit+, but
>> could be. The x-ray machine is all digital, no film. They put a sensor in
>> your mouth.
> My dentist used a sensor as well - fucking huge lump of plastic. Really
> uncomfortable. Much prefer the film in a flexible plastic cover.
I'm with you. What lame product designer couldn't think of rounding the
edges and corners??
Looks like a booming market. I found these specs:
> Maximum Gray Levels 4096 4096
> 1. Resolution: The pixel resolution of the high resolution (HiRes)
> sensors exceeds 15 lp/mm. The standard resolution of an X-Ray image,
> as measured by the modulation transfer function (MTF) exceeds 12
> lp/mm. This is measured by using a standard 60 kV intraoral X-ray source.
> 2. Dose Efficiency: The sensor will produce a high quality image
> with an X-Ray dose that is only a fraction of the standard dose
> required by Dental X-Ray film.
> 3. Diagnostic Efficacy: The system will produce a superior image
> quality of images obtained when using standard dental X-Ray film. This
> allows the dentist to diagnose standard intraoral pathologies
> encountered during screening procedures.
> 4. Wide dynamic range: The sensor pixel well capacity is very high,
> allowing a higher accommodation of greyscale (bone density) dynamic range.
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