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Knobology. Kevin deWeber, MD, FAAFP, FACSM Military Sports Medicine Fellowship Director Uniformed Services University, Bethesda, MD Slides from Andrews Institute Ultrasound Course 2011 With a few additions. Courtesy: Sean N. Martin, DO, CAQSM Capt, USAF Faculty, Family Medicine Residency
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Knobology Kevin deWeber, MD, FAAFP, FACSM Military Sports Medicine Fellowship Director Uniformed Services University, Bethesda, MD Slides from Andrews Institute Ultrasound Course 2011 With a few additions. Courtesy: Sean N. Martin, DO, CAQSM Capt, USAF Faculty, Family Medicine Residency Eglin AFB, Florida
What is “Knobology??” “The fabricated word that implies the study of gadgets and gizmos (i.e “knobs”) found on machinery used in musculoskeletal ultrasound.” ~SNM 2008 Wald, Matthew L., For Air Traffic Trainees, Games With a Serious Purpose, New York Times, Oct. 7, 2008 2003 December, C. A. Mobley and Michael Benson, The Complete Idiot's Guide to Aircraft Carriers, page 247, Alpha Books
Agenda Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E, Sonosite M Turbo, Terason T3200
Terason T3200 Ge LogiqE Sonosite M-Turbo
Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E and Sonosite M Turbo
Modes • QUALITATIVE • Gives You: • Presence of Vascularity • Direction of Flow • Does Not Give You: • Flow Velocity
Modes • QUANTITATIVE • Gives You: • Presence of Vascularity • Velocity of Flow
Modes • SUPER SENSITIVE QUALITATIVE • Gives You: • Very Sensitive Assessment of Presence of Flow • Does Not Give You: • Direction of Flow • Velocity of Flow
Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E and Sonosite M Turbo
Frequency Higher Frequency: - Less Penetration - More Resolution Lower Frequency: - More Penetration - Less Resolution
Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E and Sonosite M Turbo
Gain Serves to amplify signal being reflected back to transducer Similar to a VOLUME button
Auto-Optimization Machine provides its own interpretation of the most optimal level of gain For use in B and Doppler Modes only
Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E and Sonosite M Turbo
TGCs Time Gain Compensation (TGC): Series of EQUALIZER sliders that fine tune the “volume” at various depths * Sonosite makes use of the Near and Far Gain feature for this purpose
Basic Controls - Mode - Frequency Image Balance - Gain - TGCs - Depth - Focal Zones Function Miscellaneous - Panoramic View - Capturing Images - Cross Beam (GE), MultiBeam (Sonosite) Examples provided by GE Logiq E and Sonosite M Turbo
Depth This controls the beam’s field of view Idea is to maximize size of image on the screen while also capturing all pertinent anatomy
Depth Centimeters