IntroRadiology /certified fixed orthodontic courses by IDA

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INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com

Introduction to Radiology:

Introduction to Radiology What you need to know about imaging to get through the next four years Mark Chambers D.V.M., Ph.D., M.D. www.indiandentalacademy.com

Topics of Discussion:

Topics of Discussion How to approach reading any image What are the different imaging modalities What imaging modality is this Tips and tricks for image interpretation Practice! Practice! Practice! www.indiandentalacademy.com

How to Approach Reading any Image:

How to Approach Reading any Image Identify the patient When was the image taken Are these the proper images The five densities Are the images technically adequate www.indiandentalacademy.com

Identify the Patient:

Identify the Patient Always look for the patient name and/or number Even if the film came out of the “right” folder If something seems “wrong”, double check www.indiandentalacademy.com

When was the Image Taken:

When was the Image Taken Observe dates and times closely, especially with serial images Date “stickers” (color keyed) www.indiandentalacademy.com

Are these the Proper Images:

Are these the Proper Images Correct type of study Correct / complete views Correct limb Contrast www.indiandentalacademy.com

The Five Densities:

The Five Densities Metal Bone Soft tissue (water) Fat Gas www.indiandentalacademy.com

Are the Images Technically Adequate:

Are the Images Technically Adequate Exposure Development / display Positioning Proper contrast Artifacts Movement Interference www.indiandentalacademy.com

What are the Different Imaging Modalities:

What are the Different Imaging Modalities Radiography “plain films” Computed axial tomography “CT” Magnetic resonance imaging “MRI” Ultrasound “US” Interventional radiology “angio” www.indiandentalacademy.com

Radiography:

Radiography Also called “plain films” or “standard films” Image formed using broad beam ionizing radiation The image formed is related to the subjects density May involve the use of contrast agents Iodinated Barium Air www.indiandentalacademy.com

Computed Axial Tomography:

Computed Axial Tomography Also called CAT scanning or “CT” Image formed using a rotating thin beam(s) of ionizing radiation Image “slices” reconstructed by computation The image formed is related to the subjects density Image display on computer or multiple films New technology is multislice helical scanner www.indiandentalacademy.com

Magnetic Resonance Imaging:

Magnetic Resonance Imaging Also called “MRI” (used to be NMRI) Image formed by transmitting and receiving radio waves inside a high magnetic field Image “slices” reconstructed by computation The image formed is related to: Scanner settings Patient hydrogen density Patient hydrogen chemical/physical environment Image display on computer or multiple films www.indiandentalacademy.com

Ultrasound:

Ultrasound Also called “sono” or “echo” or “US” Image formed by transmitting and receiving high frequency sound waves Image “slices” reconstructed by computation The image formed is related to interfaces between tissue areas of differing sound transmission characteristics Image display on computer or multiple films www.indiandentalacademy.com

Interventional Radiology:

Interventional Radiology Also called angiography or “angio” or “IR” Image formed using broad beam ionizing radiation (fluoroscopy) Images acquired using digital detector and processed by computer The image formed is related to the subjects density Usually involves the use of iodinated contrast agents and long catheters Many varied techniques including the use of CT or MRI Image display on computer or multiple films www.indiandentalacademy.com

What Imaging Modality is this:

What Imaging Modality is this Is it plain film or interventional Is it CT or MRI www.indiandentalacademy.com

Plain Film or Interventional:

Plain Film or Interventional May look very similar Angio studies usually printed on large sheet film like CT or MRI Will usually see catheter or needle, often with contrast in IR studies www.indiandentalacademy.com

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CT or MRI:

CT or MRI CT images are tissue density related Brightness and contrast may vary Bone is brighter than fat MRI is not density related Brightness and contrast may vary Bone is darker than other tissues www.indiandentalacademy.com

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PowerPoint Presentation:

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PowerPoint Presentation:

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Tips and Tricks for Image Interpretation:

Tips and Tricks for Image Interpretation The “quick read” technique Scrolling through axial images www.indiandentalacademy.com

The “quick read” Technique:

The “quick read” Technique Why did you order the image What did you expect to see Do you see it Now start over fresh www.indiandentalacademy.com

Scrolling Through Axial Images:

Scrolling Through Axial Images Rapid paging through sequential images On computer display of CT and MRI images Allows you to follow long/large structures Helps rapidly identify small higher contrast areas www.indiandentalacademy.com

Practice! Practice! Practice!:

Practice! Practice! Practice! Radiology, News, Education, Service Teenage male with severe left arm pain after hit while playing football. Man with leg swelling and mass in popliteal fossa. History of trauma 8 months ago. Fifty-year-old woman originally presenting with headaches and claudication. www.indiandentalacademy.com

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Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com

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