Re: Skin Dose Monitor

[Chris Alston <alstonc@odrge.odr.georgetown.edu>]

I agree that the PEMNET is a much better way to go, especially if it will be
an integral part of a new installation, in which case the cost is relatively
minor. My most recent information on pricing is that the file server, which
can cover up to eight generators, is ~$US7500. Each monitoring unit (one
needed per generator) is ~US$9500. So one can get off the ground for US$17K,
and add new tubes to the system for US$9500 each. There are also some costs
of installation, which would vary with location. The caveat is, of course,
that prices are always subject to change without notice.

chris alston
P.S. These opinions are mine alone.

At 05:49  01/06/98 -0500, you wrote:
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>Bill,
>
>We tried to work with it but there are difficulties.  First, it is
>difficult to position it in the center of the field after the patient is
>on the table.  Second, as soon as it is positioned the cardiologist
>decides to change the projection slightly and the detector is not longer
>at the peak of the field or even in the feild.  Consequently, I suspect
>that all measurements with this device underestimates the actual skin
>exposure.
>
>The alternatives-- Clinical Microsystems PEMNET-- expensive.  It is
>about $12,000 per x-ray tube in a multitube setup.  You could also
>consider a dose-area-product meter but these do not give you skin dose.
>PTW makes a DAP which also gives entrance skin exposure.
>
>Good Luck!!
>
>          Joel
>
>Joel E. Gray, Ph.D., Consultant
>2804 Second Street SW, Suite 334
>Rochester, Minnesota 55902
>
>Ph  507-286-8910
>Cell Ph  507-269-4247
>Fax  507-286-8910
>e-mail  joelgray@sprynet.com
>
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>
>
>On Jan 6,  2:46pm, William Potvin wrote:
>> Subject: Skin Dose Monitor
>>
>>          ** Mail from Medphys Listserver **
>> If you reply to this message, it will be posted on Medphys for all the
>> subscribers to review ...
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>>
>>      Colleagues -
>>
>>      We are contemplating routine skin dose measurements for patients
>>      undergoing certain cardiovascular procedures.  Does anyone have
>>      experience to share with the use of the McMahon Skin Dose Monitor
>>      system? It uses a 1 mm scintillation detector coupled by fiber
>optics
>>      to a reader/display unit.
>>
>>
>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>>
>>      William J. Potvin, Ph.D.
>>      Senior Medical Physicist
>>      Flower Hospital
>>      Sylvania, Ohio
>>
>>      Voice:  419-824-1212
>>      FAX:    419-824-1752
>>      E-mail: William.Potvin@promedica.org
>>-- End of excerpt from William Potvin
>