[Histonet] Xray contrast

Dickey, Coral cad <@t> Stowers-Institute.org
Thu Jan 31 17:07:18 CST 2008

The Faxitron is not digital. 

-----Original Message-----
From: Gayle Callis [mailto:gayle.callis <@t> bresnan.net] 
Sent: Thursday, January 31, 2008 3:57 PM
To: Keller, Charles; Dickey, Coral; histonet <@t> lists.utsouthwestern.edu
Subject: Re: [Histonet] Xray contrast

Dear Charles,

Where were you and your micro CT scanner when I was doing all this
We decalcified most murine bones with formic acid, rinsed with water
radiographic (FAXITRON) checks.  We still had to cut back on kvp and
with our non digital, old but beloved FAXITRON.    The XOMAT film was
contrast if I remember correctly.  EDTA + 100% alcohol will also form 
preciptates in the bone that you may not want to have for any future 
sectioning either.

Also, Coral did not indicate that her FAXITRON was a digital machine?

 Gayle M. Callis
Bozeman MT 59715

----- Original Message ----- 
From: "Keller, Charles" <kellerc2 <@t> uthscsa.edu>
To: "Dickey, Coral" <cad <@t> Stowers-Institute.org>; 
<histonet <@t> lists.utsouthwestern.edu>
Cc: "Prajapati, Suresh" <Prajapati <@t> uthscsa.edu>
Sent: Thursday, January 31, 2008 1:45 PM
Subject: RE: [Histonet] Xray contrast

Dear Coral,

you may be decalcifying the specimen so that it will be hard to take a
good picture.  Changing the buffer to PBS will improve the contrast
above background.  If it isn't an issue with sectioning, you can
transition it to 100% ethanol for much better contrast.  Averaging
several digital exposures will also increase signal:noise.

I can also do a nice overnight scan with our microCT
(http://ccri.uthscsa.edu/MicroCT.html) at no charge if you wish.


Charles Keller, MD
Assistant Professor, Department of Cellular & Structural Biology Adjunct
Assistant Professor, Department of Pediatrics Director, Small Animal
Imaging Facility Greehey Children's Cancer Research Institute The
University of Texas Health Science Center 8403 Floyd Curl Drive, Mail
Code 7784 San Antonio, TX 78229-3900 210-562-9062 [office] 210-562-9014
[fax] http://gccri.uthscsa.edu or www.sarcomalab.org
kellerc2 <@t> uthscsa.edu

Postdoctoral Opportunities and
Undergraduate & Summer Internships: http://ccri.uthscsa.edu/keller

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-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of Dickey,
Sent: Thursday, January 31, 2008 2:25 PM
To: histonet <@t> lists.utsouthwestern.edu
Subject: [Histonet] Xray contrast

Hello in Histoland,

I am trying to track the decalcification of some 42 day old mouse humeri
and femurs by xray. They have been in 10% EDTA for 36hrs and I just took
a film on KODAK BioMax MS film on a Faxitron xray machine. The bones
were exposed for 30 sec at 30kvp. I would like to increase the contrast
on the picture. Does anyone know how to do this.

Thanks in advance.

Coral Dickey
Histology Specialist I

Stowers Institute for Medical Research
1000 E. 50th Street
Kansas City,  Missouri  64110
Phone:  816-926-4305
e-mail:  cad <@t> stowers-institute.org

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