[Oradlist] RES: I Cat artefact
giuseppe at rdoradiologia.com.br
giuseppe at rdoradiologia.com.br
Thu Aug 5 07:59:50 PDT 2010
Hello All
Some simple tests with Classic iCat can reproduce images of concentric rings
generated from different areas of the sensor, simulating a fail.
The images produced were obtained from plastic object(shirt button), placed
in different areas of "flat panel" (pictured), whose goal was to "minimize"
the X-ray beam at certain areas, simulating a failed calibration.
I suppose that differents artefacts (ring) with diferent level of
transparencies, could overlay images of the patient, with no dimensional
alterations.
Giuseppe Valduga Cruz DDS, MSc
UNIVILLE School of Dentystry
Joinville, Brazil
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Enviada em: terça-feira, 3 de agosto de 2010 12:44
Para: oradlist at lists.ucla.edu
Assunto: Oradlist Digest, Vol 82, Issue 6
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Today's Topics:
1. Re: Oradlist Digest, Vol 82, Issue 1, I Cat artefact,
concentric rings, patient movement (Garnet Packota)
2. Re: Fwd: New case (Matteson, Stephen R)
3. Re: Continued Professional Development (Garnet Packota)
4. Re: Continued Professional Development (Johan Aps)
5. Re: Fwd: New case (Allan G Farman)
----------------------------------------------------------------------
Message: 1
Date: Tue, 03 Aug 2010 09:18:56 -0600
From: Garnet Packota <garnet.packota at usask.ca>
To: Oral Radiology Discussion Group <oradlist at lists.ucla.edu>
Subject: Re: [Oradlist] Oradlist Digest, Vol 82, Issue 1, I Cat
artefact, concentric rings, patient movement
Message-ID: <4C583360.3050309 at usask.ca>
Content-Type: text/plain; format=flowed; charset=ISO-8859-1
The concentric ring artifact I encountered was not present prior to the
"collision" between the tube head assembly and the chin cup at the time
of scanning a patient. It did not go away after initial re-calibration
(whenever calibration is done, the head rest and chin cup are always
removed). As for patient movement, the artifact occurred with scans
from two young, healthy patients who did not have any difficulty holding
still.
Tech support at Imaging Sciences said the artifact might be caused by a
"bad pixel", and that they might have to recalibrate online. However,
at the time I could not connect to the internet and they did not have a
chance to check it.
The good news is that after after performing the daily calibration
before we scanned patients on Friday, the artifact was gone. So, I am
not exactly sure what the cause was - hopefully I have solved the problem.
Garnet V. Packota, DMD, MSc, RCDC (C)
College of Dentistry
University of Saskatchewan
Joerg wrote:
> Dear all,
>
> those artefacts may occur, if a patient is moving in the meaning of
> shivering or action tremor which you may observe by patients suffering of
> Parkinson's disease.
>
> I am currently working on my dissertation, simulating different patient
> movements - the action tremor is exactly looking like a calibration
problem
> in some of the datasets acquired from different CBCT machines.
>
> BR J?rg Mudrak
>
>
>
>
>
>
>
> J?rg Mudrak
> Oralchirurg
> Am Stetenrain 11
> D - 36251 Ludwigsau/Hess.
> Tel.: +49 (0) 6621 795 0946
> Fax: +49 (0) 6621 795 0947
> Mobil: +49 (0) 176 631 93 964
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------------------------------
Message: 2
Date: Tue, 3 Aug 2010 10:26:10 -0500
From: "Matteson, Stephen R" <MATTESON at uthscsa.edu>
To: Oral Radiology Discussion Group <oradlist at lists.ucla.edu>
Subject: Re: [Oradlist] Fwd: New case
Message-ID:
<711229508920C34AA388EE350C73BFFC1982D8B629 at HSC-M2.win.uthscsa.edu>
Content-Type: text/plain; charset="iso-8859-1"
I am thinking giant cell granuloma.
Steve Matteson
________________________________
From: oradlist-bounces at lists.ucla.edu [oradlist-bounces at lists.ucla.edu] On
Behalf Of Ebtihal Alabdeen [ebtihalh at gmail.com]
Sent: Monday, August 02, 2010 8:15 AM
To: Oral Radiology Discussion Group
Subject: [Oradlist] Fwd: New case
Hi all
This one of my first cases that i wanted to share with you:
A 22 years old female came to the MF clinic with a hard swelling in the
anterior region of the mandible ,the lesion appeared 2 years ago and
diagnosed by general pathologist
and excesional bisobsy was done, this time the aspiration revealed blood.
The panoramic view shows a sclerotic multilocular (shown in the occlusal
view) radiolucency extending from 45 to 35 displacing the anterior teeth,
the last panoramic view 2010 shows a remaining root below the apex of 45 and
44 but i am not sure since no tooth is missing there.
the x-rays available are as follow 1. panoramic 2008 2.panoramic 2008 after
surgery 3.panormaic 2010 recurrence 4. Occlusal 2010 recurrence
I have requested CT for her but in the meantime what do suggest as
defferential diagnosis ? i suggest giant cell granuloma, odontogenic
keratocyst, ameloblastic fibroma, however non of them was in the general
pathologist diagnosis it was reported to be Adenomatoid odontogenic tumor.
Do you suggest take another biobsy to oral pathologist?
--
Ebtihal H. Zain Alabdeen, BDS, Msc
Oral and Maxillofacial Radiology
Ministry of Health
Riyadh, Saudi Arabia
--
Ebtihal H. Zain Alabdeen, BDS, Msc
Oral and Maxillofacial Radiology
Ministry of Health
Riyadh, Saudi Arabia
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Message: 3
Date: Tue, 03 Aug 2010 09:28:57 -0600
From: Garnet Packota <garnet.packota at usask.ca>
To: Oral Radiology Discussion Group <oradlist at lists.ucla.edu>
Subject: Re: [Oradlist] Continued Professional Development
Message-ID: <4C5835B9.7090100 at usask.ca>
Content-Type: text/plain; format=flowed; charset=ISO-8859-1
In Canada, at least in the two provinces in which I have a practicing
licence, faculty members must be licenced in order to be able to teach
and practice any discipline of clinical dentistry. In these two
provinces (and probably most or all of the others), you can obtain a
small number of continuing education points by being a faculty member,
but not enough to maintain your licence.
if you have aAllan G Farman wrote:
> I have active specialty licenses in the USA, South Africa and the
> United Kingdom... and ALL require academics working in Universities to
> take continuing education or demonstrate keeping current with
> knowledge. The ABOMR and the JBOMR also require continuing education
> be documented. Just because you teach does not necessarily mean you
> keep up to date. 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
>
>
> >>> <phrabha at um.edu.my> 8/3/2010 4:11 AM >>>
> Dear colleagues,
>
> The Malaysian Dental Council, which is the regulatory body for
> practising dentists wants everyone to go for Continued Professional
> Development (CPD) courses annually. I am not sure if faculty members
> of dental institutions or universities need to achieve the required
> CPD points for their practising licence. Afterall we always keep
> abreast with latest information and passing this information to our
> students. Is this a norm in your own country? Is there any country
> where this requirement is exempted for academic members? Please let me
> know.
>
> Thanks and with regards,
>
> Phrabha Nambiar
> Faculty of Dentistry
> University of Malaya
> Malaysia
>
> phrabha at um.edu.my
>
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Message: 4
Date: Tue, 03 Aug 2010 17:19:24 +0200
From: "Johan Aps" <johan.aps at ugent.be>
To: "Oral Radiology Discussion Group" <oradlist at lists.ucla.edu>
Subject: Re: [Oradlist] Continued Professional Development
Message-ID: <20100803171924.15142b1rr2aoadmk at webmail.ugent.be>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Dear Allan,
You are absolutely right.
But if you, as an academic, not only teach undergraduates and
postgraduates, but also teach in the "continuing education programm",
one could ask the question, if this is not proof enough of the
engagement of trying to keep up with the literature.
I agree that it is our duty to try to keep up with, but on the other
hand, so far we haven't been able to check if the quality of care has
improved since we introduced the accreditation here in Belgium 11
years ago.
It is an interesting discussion which will wake up some people...
Kind regards,
Johan
--
Prof. dr. Johan Aps (DDS- Cert. Paed. Dent. & Special Care - MSc DMFR
<London
University, UK> - PhD)
Head of Dental & Maxillofacial Radiology
Senior Clinical Consultant
Coordinator Postgraduate Teaching Ghent University Dental
School(accreditation
system Belgium)
Dental School & Ghent University Hospital
Ghent University
UZG-P8- Dental School- De Pintelaan 185, 9000 Gent - Belgium
(tel)+32 9 332 51 02
(fax) +32 9 332 3851
(secretary) +32 9 332 3857
johan.aps at ugent.be
Quoting "Allan G Farman" <agfarm01 at louisville.edu>:
> I have active specialty licenses in the USA, South Africa and the United
> Kingdom... and ALL require academics working in Universities to take
> continuing education or demonstrate keeping current with knowledge. The
> ABOMR and the JBOMR also require continuing education be documented.
> Just because you teach does not necessarily mean you keep up to date.
> 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
>
>
>>>> <phrabha at um.edu.my> 8/3/2010 4:11 AM >>>
> Dear colleagues,
>
> The Malaysian Dental Council, which is the regulatory body for
> practising dentists wants everyone to go for Continued Professional
> Development (CPD) courses annually. I am not sure if faculty members of
> dental institutions or universities need to achieve the required CPD
> points for their practising licence. Afterall we always keep abreast
> with latest information and passing this information to our students.
> Is this a norm in your own country? Is there any country where this
> requirement is exempted for academic members? Please let me know.
>
> Thanks and with regards,
>
> Phrabha Nambiar
> Faculty of Dentistry
> University of Malaya
> Malaysia
>
> phrabha at um.edu.my
>
----------------------------------------------------------------------------
----------------
> UNIVERSITY OF MALAYA - " The Leader in Research & Innovation "
>
> 'This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed. If you have received this email in error, please notify the
> system manager. Please note that any views or opinions presented in
> this email are solely those of the author and do not necessarily
> represent those of the University. Finally, the recipient should check
> this email and any attachments for the presence of viruses. The
> University accepts no liability for any damage caused by any virus
> transmitted by this email.'
>
------------------------------
Message: 5
Date: Tue, 3 Aug 2010 11:42:58 -0400
From: Allan G Farman <agfarm01 at louisville.edu>
To: "Oral Radiology Discussion Group" <oradlist at lists.ucla.edu>
Subject: Re: [Oradlist] Fwd: New case
Message-ID: <4C5800C20200009A00090302 at gwise.louisville.edu>
Content-Type: text/plain; charset="us-ascii"
Definitely a possibility, however one might expect to see floccules of
calcification in the lesion by age 22 years if an AOT. AGF
Kullman <leikul at yahoo.com> 8/3/2010 11:18 AM >>>
Dear Ebtihal
I think you shouldn't rule out an adenomatoid odontogenic tumor either,
it's an uncommon lesion which is found rather often in younger females.
I attach an OPG of an AOT which we found here Kuwait University in a
15 year old girl.
Best regards Leif
Leif Kullman DDS, PhD
Assoc. Professor
Oral and Maxillofacial Radiology
Faculty of Dentistry
Kuwait University
--- On Tue, 8/3/10, Koenig, Lisa <lisa.koenig at marquette.edu> wrote:
From: Koenig, Lisa <lisa.koenig at marquette.edu>
Subject: Re: [Oradlist] Fwd: New case
To: "Oral Radiology Discussion Group" <oradlist at lists.ucla.edu>
Date: Tuesday, August 3, 2010, 10:47 AM
Ebtihal, Location, gender and age are consistent with CGCG which can
recur especially if conservative curettage is performed. Ameloblastoma
would have to also be high on the list because of recurrence,
soap-bubble loculations and straight resorption of the root apices. I
agree with Allan that KOT is much less likely because of the expansion.
And I recommend sending the biopsy specimen to an ORAL pathologist if
available. Lisa
Lisa J. Koenig BChD, DDS, MS
Program Director, Oral Medicine and Oral Radiology
Marquette University School of Dentistry, Rm: 370
PO Box 1881
Milwaukee, WI 53201-1881
Tel: (414) 288-5675
Fax: (414) 288-6081
From: oradlist-bounces at lists.ucla.edu
[mailto:oradlist-bounces at lists.ucla.edu] On Behalf Of Allan G Farman
Sent: Tuesday, August 03, 2010 9:20 AM
To: Oral Radiology Discussion Group
Subject: Re: [Oradlist] Fwd: New case
The cortical expansion at this stage would make keratocystic
odontogenic tumor (OKC) a little less likely than the other choices you
list. Ameloblastoma would be high on the list and another consideration
might be mucoepidermoid tumor. Realistically, the definitive
interpretation will require a biopsy specimen from the growing margin
and histopathological analysis. Look forward to you providing the
histopathology. 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
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
>>> Ebtihal Alabdeen <ebtihalh at gmail.com> 8/2/2010 9:15 AM >>>
Hi all
This one of my first cases that i wanted to share with you:
A 22 years old female came to the MF clinic with a hard swelling in the
anterior region of the mandible ,the lesion appeared 2 years ago and
diagnosed by general pathologist
and excesional bisobsy was done, this time the aspiration revealed
blood. The panoramic view shows a sclerotic multilocular (shown in the
occlusal view) radiolucency extending from 45 to 35 displacing the
anterior teeth, the last panoramic view 2010 shows a remaining root
below the apex of 45 and 44 but i am not sure since no tooth is missing
there.
the x-rays available are as follow 1. panoramic 2008 2.panoramic 2008
after surgery 3.panormaic 2010 recurrence 4. Occlusal 2010 recurrence
I have requested CT for her but in the meantime what do suggest as
defferential diagnosis ? i suggest giant cell granuloma, odontogenic
keratocyst, ameloblastic fibroma, however non of them was in the general
pathologist diagnosis it was reported to be Adenomatoid odontogenic
tumor. Do you suggest take another biobsy to oral pathologist?
--
Ebtihal H. Zain Alabdeen, BDS, Msc
Oral and Maxillofacial Radiology
Ministry of Health
Riyadh, Saudi Arabia
--
Ebtihal H. Zain Alabdeen, BDS, Msc
Oral and Maxillofacial Radiology
Ministry of Health
Riyadh, Saudi Arabia
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