[Oradlist] Pantomographic unit

Ruprecht, Axel axel-ruprecht at uiowa.edu
Tue Sep 23 07:32:33 PDT 2008


Roberto

That was what I assumed that you meant, but I wondered if there was some other calibration that I was unaware of.

Thank you.

Rgds
[cid:image001.jpg at 01C91D5F.4ECF8010]

From: oradlist-bounces at lists.ucla.edu [mailto:oradlist-bounces at lists.ucla.edu] On Behalf Of Roberto Molteni
Sent: Tuesday, September 23, 2008 8:56 AM
To: Oral Radiology Discussion Group
Subject: Re: [Oradlist] Pantomographic unit

Verona, 2008 September 23

Axel, I cannot because (as I indicated) I am not "associated" with that particular model and make of panoramic machine, hence I don't know the detailed technicialities of its calibration.
My comment was of general and universal nature for any panoramic system: if a patient happens to be displaced sidewise (or rotated), the side opposite to the displacement gets distorted (over-magnified). It the displacement is modest (and perhaps combined with a compensating slight rotation of the head), then the only effect may be the different density noticeable in Laurie's images.
It is not uncommon that the saggital positioning vertical light line may get a little out of adjustment, and since patients are positioned with respect to it, they would be systematically (slightly) mispositioned. Panoramic machines generally have procedures to check and re-adjust the position of the sagittal light with respect to to the midline axis of the machine.
Roberto

Dr Roberto Molteni
Chief Technical Officer
AFP Imaging Corporation
 [cid:image002.gif at 01C91D5F.4ECF8010] <http://www.afpimaging.com/>




From: oradlist-bounces at lists.ucla.edu [mailto:oradlist-bounces at lists.ucla.edu] On Behalf Of Ruprecht, Axel
Sent: Tuesday, 2008 September 23 15:19
To: 'Oral Radiology Discussion Group'
Subject: Re: [Oradlist] Pantomographic unit

Good morning Roberto

You mention calibration for the left and right density difference. Could you provide more details as to what you are suggesting?

Thank you.

Rgds
[cid:image001.jpg at 01C91D5F.4ECF8010]



From: oradlist-bounces at lists.ucla.edu [mailto:oradlist-bounces at lists.ucla.edu] On Behalf Of Roberto Molteni
Sent: Tuesday, September 23, 2008 7:36 AM
To: Oral Radiology Discussion Group
Subject: Re: [Oradlist] Pantomographic unit

Verona 2008 September 23rd

Dear Prof. Carter (Laurie)

By looking at the two full panoramic images that you posted, it seems to me that the panoramic machine on which they were taken might benefit from a slight recalibration: in both cases the left side of the patient is shown slightly darker than the right side (in the cuspid-premolar area). Also, in one case the right condyle was partially missing (of course I don't know whether the last circumstance was a consequence of you cropping the image at that side for the web posting - which seem a likely possibility since the two images have different aspect ratios).
Anyway, that phenomenon (the asymmetrical density especially in the cuspid area) is often associated to the patient being positioned slightly to one side (the left, in this case) which may happen consistently if the light for the sagittal line points slightly to the left (say, a couple of mm) of the central axis of the machine.

Roberto Molteni
CTO
AFP Imaging / Dent-X / QR

Oh, I almost forgot: in line with the recommendations from Prof. Allan Farman (with which I fully concur), I must disclose that I am very associated with commercial panoramic machines (actually, I am a vendor), and currently that is the Dent-X Strato and Dent-X Rotograph.



From: oradlist-bounces at lists.ucla.edu [mailto:oradlist-bounces at lists.ucla.edu] On Behalf Of Laurie C Carter/HSC/VCU
Sent: Tuesday, 2008 September 23 14:01
To: Oral Radiology Discussion Group
Subject: Re: [Oradlist] Pantomographic unit


Allan,
I agree that multiple factors need to be considered when selecting any imaging system. With panoramic systems, the focal trough should also be taken into consideration with respect to the nature of the practice. I have also consulted for Instrumentarium Imaging, along with other companies. I offered support for their panoramic imaging system because I like the images it produces on a consistent basis - with very good resolution. My endorsement was not a negative reflection on other products. A few examples are attached.
Laurie



Laurie C. Carter, D.D.S., Ph.D.
Professor and Director, Oral and Maxillofacial Radiology
Director of Advanced Dental Education
Virginia Commonwealth University School of Dentistry
315 Lyons Bldg., 520 N. 12th St., P.O. Box 980566
Richmond, Virginia 23298
(804)828-1778, (804)828-6234 FAX
lccarter at vcu.edu
Allan G Farman <agfarm01 at louisville.edu>
Sent by: oradlist-bounces at lists.ucla.edu

09/23/2008 06:35 AM
Please respond to
Oral Radiology Discussion Group <oradlist at lists.ucla.edu>


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Re: [Oradlist] Pantomographic unit







Andres... I was not referring to you but to others who responded who I
know personally and happen to be able to associate with more cosy
relations to the vendor concerned. I also have no problem with
Instrumentarium or their products which are excellent... but then I too
have consulted for Instrumentarium in the past.  It was the use of the
ORADLIST blog by a number of individuals in succession to highlight
merely one vendor's product without any reflection to other products and
without the caveat that you now supply that I found questionable. I
would like the individuals supporting a product to indicate any
conflicts of interest in the same manner they would be expected to do
prior to giving a continuing education lecture at a congress... and to
more precisely specify the rationales for their endorsements. Best
wishes, Allan

Allan G. Farman, BDS, PhD, MBA, DSc, Diplomate ABOMR

Prof. Radiology & Imaging Science
Univ. Louisville School of Dentistry: SUHD
501 South Preston Street,
Louisville, Kentucky 40292, USA

Tel: +1(502) 852.1241
Fax: +1(502)852.1626


>>> "Andrés Briner" <andresbriner at gmail.com> 09/22/2008 08:26 PM >>>
Dear Professor Farman
It is  important to me to state clearly that I have absolutely no
relation
in any possible way with Instrumentarium except that I work in 2
private clinics dedicated to DMFR and 2 hospitals, using  in total 3 OP
100
and 2 OP 200 Digital units from Instrumentarium.   The only I said is
about
the image quality of those equipments, and I agree with you, that there
are
others factors that have to be considered in the moment to choose a
particular brand, but sincerely I don't fill comfortable with your
comment
about at least 3 of the respondents have some relation with the
company,
because in my case, this is not true.      I have not signed my email
as an
expert, it is an humble and honest opinion coming from a colleague from
a
far country.  I think we will help in a better way our colleague Dr.
Rampa
Ganguluy giving him choices and arguments to make the best possible
choice,
If not, what for is this discussion group?.

Sincerely

Dr. Andres Briner
IMAX radiological centres
Santiago
Chile




On Mon, Sep 22, 2008 at 4:03 PM, Allan G Farman
<agfarm01 at louisville.edu>wrote:

> I have read with great concern the communications related to your
seemingly
> simple request. To date you have had a single recommendation with a
single
> example image provided - and at least three of the respondents to my
> knowledge have provided consulting services or even in one case has
even
> been tantamount to a salesman for the unit concerned. This is not a
> criticism of the Instrumentarium Imaging panoramic system, which I
have also
> had excellent experience in using; it is rather a criticism of the
use of
> this blog to provide apparently "expert" opinion with no need to
reference a
> scientific study or provide actual comparisons of relevant clinical
> information to support the recommendations made.
>
> When making a purchasing decision I would advise anyone to be
extremely
> careful of the information received from a "blog.' There are actually
many
> excellent panoramic systems on the market at this time ad the choice
is
> quite complex dependent on the type of clinic, type of patient, type
of
> procedure, local support provided by a given vendor, budget, and
desired
> recording medium plus details of interoperability of digital systems
with
> the practice management system of the buyer. I obviously cannot talk
about
> systems that I have not used, but in addition to Instrumentarium, I
have
> also had excellent experience with Kodak Dental Imaging, Planmeca,
and
> Sirona systems at the medium to upper end of the market and have
also
> produced excellent images even with an inexpensive Panoramic
Corporation PC
> 1000 when equipped with an AJAT digital sensor capable of permitting
> after-the-fact adjustment of the image layer. There
are undoubtedly
several
> solutions and the one that is best will d!
>  epemd on a multitude of inputs concerning the clinical needs
circumstances
> involved.
>
> AGF
>
> Allan G. Farman, BDS, PhD, MBA, DSc, Diplomate ABOMR
>
> Prof. Radiology & Imaging Science
> Univ. Louisville School of Dentistry: SUHD
> 501 South Preston Street,
> Louisville, Kentucky 40292, USA
>
> Tel: +1(502) 852.1241
> Fax: +1(502)852.1626
>
>
> >>> "Rumpa Ganguly" <gangulyrumpa at gmail.com> 09/21/2008 03:16 PM >>>
> Hi all,
>
> I am a third year resident in Oral & maxillofacial radiology at
UIowa. We
> need to purchase a pantomographic unit (digital) for one of our
> clinics in our school. I am reviewing all the possibilities that are
> available. Any suggestions on the available units and your experience
with
> them would be helpful.
>
> Thanks,
>
> Rumpa Ganguly
> Chief Resident
> Oral and maxillofacial radiology
> College of dentistry, University of Iowa
>
>
> _______________________________________________
> Oradlist mailing list
> Oradlist at lists.ucla.edu
> http://lists.ucla.edu/cgi-bin/mailman/listinfo/oradlist
>

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