Clinical Photography as a Tool for Better Diagnosis and ... · Canon EF 100mm f/2.8 Nikkor 85mm...
Transcript of Clinical Photography as a Tool for Better Diagnosis and ... · Canon EF 100mm f/2.8 Nikkor 85mm...
Glenn D. Krieger, DDS, MS, FAGD
© 2011 The Krieger Continuum
[email protected] www.dentalphotography.blogspot.com
Clinical Photography as a Tool for Better Diagnosis and Case Acceptance
Copyright 2013 Krieger Continuum
§ What do you do before the exam?§ After the exam, how do you determine the
treatment plan?§ How do you explain to the patient what their
next step is?§ Do you have a clear, repeatable process to
educate and motivate patients towards carethat is in their best interests?
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Things one must think about for better case acceptance using photography
Digital Co-Diagnosis
A process whereby the patient helps diagnose the case themselves before any treatment is
presented
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What is the process for success with digital co-diagnosis?
• Consultation
• Exam
• Casts and Images
• Review of Findings
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Consultation What is the goal?
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Exam What do we do differently?
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Casts & Images How do we get there?
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Review of Findings How does it work?
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There are a number of factors to consider:
•Composition
•Lighting
•Camera Equipment
•Camera,Flash,Lens
•Dental Equipment
•Mirrors, Retractors
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Nikon R1 Macro Speedlight
Wireless Less bulky
Less controls to manage
If one likes the flash, but doesn’t shoot a Nikon, the R1C1 can be adapted to almost
any camera. Don’t forget to pop up the built-in flash or
the R1 will not fire
CanonMacro Twin Lite MT-24EX Wired Bulkier
More controls to manage
R1 Flash Setup
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Comparable Nikon and Canon Flashes Compared
Nikon D7200 Canon EOS 80D
Camera Bodies
Weight Cost
730 gms765 gms
$899 $999
Canon EF 100mm f/2.8
Nikkor 85mm f/3.5
Micro-Nikkor 105mm f/2.8
Weight
SuggestedCost
15 oz 25.4 oz
$599 $984
21.2 oz
$599
Lenses
The Histogram
§ We need to understand the histogram inorder to understand how light is seen bythe camera. If we master the control oflight, our images will look perfect.
§ The histogram gives a diagrammatic viewof how the light entering the camera isprocessed by tone.
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All of the tones of the image are captured in the histogram with pure white on the right and pure black on the left.
Pure White Pure
Black
Everything in the middle are the mid-tones such as red, green and blue.
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We want to shoot all of our images with the highest peak centered or slightly left of center, or slightly underexposed (darker). This gives us the best chance to capture a great image.
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The higher the “f-stop”, the less light is allowed into a camera, and the darker the
image will appear.
So, if the peak in the histogram is too far to the left, that means that our image was too ____, and we want to make the “f-stop” ____, to let in _____ light.
If the peak in the histogram is too far to the right, that means that our image was too _____, and we want to make the “f-stop”______, to let in ____light.
Think of it like you would sunscreen…
If there’s too much bright sunlight, we use a higher SPF. A little darker, we use a lower SPF.
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This is an example of an image taken with a
low “f-stop” and aweaker flash setting.
This is an example of an image taken with a
higher “f-stop” and astronger flash setting.
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A proper flash for dental use should have adjustments for at least M (Full power), M1/4 and M1/32. Some allow for even more options than that.
You see, the higher the “f-stop”, the greater the depth of field.
So, if we take an image with the most flash, “M”, and have to turn our “f-stop” way up, we’ll have
great depth of field.
But, if we decide to take the same photo with a flash setting of 1/32, letting in only a little light,
we’ll have to turn the “f-stop” way down and the depth of field is greatly reduced.
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ISO Setting • The ISO setting is the camera sensor’s
sensitivity to light.
• The higher the number the greaterthe sensitivity
• ISO 200 is an excellent setting for thedental setting
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Image type • Choices are generally TIFF, JPEG or
RAW
• Also have a choice of Large/Fine
Other Settings • White Balance
• Aperture Priority
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Mirrors
§ Rhodium coated is the standard§ Traditional mirror design makes it
difficult to capture ideal images
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§ Newly designed mirrors make it easier to capture exquisite images with less discomfort to patients
§ Can be ordered from The Krieger Continuum
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Retractors
§Can be plastic or metal§ Personal preference§Can also be ordered from Continuum
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Appendix
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Approximate Starting Points for Flash and f-stops
Type of Image Flash setting f-stop Magnification
Full Face (smile,repose or profile) M 14 ~1:10 Smile or Repose (close up) ¼ 25 1:3 Retracted (Closed or Open) ¼ 32 1:2.5 Max or Mand Occlusal ¼ 25 1:3 Maxillary Front 6 ¼ 45 1:1.8 (Use black bkgrnd) Mandibular Front 6 ¼ 40 1:1.6 (Use black bkgrnd) Lateral arch ¼ 36 1:2.25 Max 6 Occl ¼ 36 1:2 Mand 6 Occl ¼ 36 1:1.8 2 Centrals(Characterization) 1/32 32 1:1 2 Centrals(Normal) 1/32 29 1:1 Single tooth (mirror) ¼ 57 1:1
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Stellar Lighting Systems 18” Ring Light
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2 Choices for Black Backgrounds
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DIGITAL LIGHTHOUSE WWW.PHOTEKUSA.COM
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[email protected] www.dentalphotography.blogspot.com