Presentation on theme: "Fundamental Imaging Characteristics and Resolution of Metal Alloys By Marc G. Apple, M.D. Mark Michael This presentation will probably involve audience."— Presentation transcript:
Fundamental Imaging Characteristics and Resolution of Metal Alloys By Marc G. Apple, M.D. Mark Michael This presentation will probably involve audience discussion, which will create action items. Use PowerPoint to keep track of these action items during your presentation In Slide Show, click on the right mouse button Select Meeting Minder Select the Action Items tab Type in action items as they come up Click OK to dismiss this box This will automatically create an Action Item slide at the end of your presentation with your points entered.
FWMs Mission Statement Fort Wayne Metals was founded and continues to grow because of our dedication to the medical device field Our mission is to continuously improve the quality of our products, the speed and efficiency with which we respond to our customers requests, and the knowledge of the materials we work with and recommend.
Typical Wire Application Need Diameter Strength Fatigue Corrosion Resistance Electrical Resistance Formability But Now…
Imaging What size wire should I use? Which alloy will work best? Will flat wire be better than round? How can we find answers? –What modality will you use? –What is a good image? –What technology will be used?
Where did we start Most implantable wires lose imaging capability under.004(.1mm) The best still perform around.001(.025mm)
The Concept Choose wire diameters from.001 to.011 (.025mm to.28mm) Choose common alloys and candidate alloys Mount in stable fashion Characterize using common modalities
Selecting Modalities Dr. Marc Apple at Parkview Oncology Center Discuss imaging from a clinician point of view Choose common modalities: Ximatron Hi-Res Fluoroscopy Picker PQS CT Scanning Simulator Siemans Magnetic Resonance Imaging
Ximatron Hi-Res Fluoroscopy 100 cm source to surface distance 110kv; 25ma; 3mas, 1.5mag latitude for technician
Variables in Imaging Media- Impact of bolus was significant Default equipment settings
Siemens Magnetom Harmony magnetic resonance imaging
MRI Measurement Parameters Magnetom Harmony Class 1.0 Tesla magnetic field Operated at a 42 M#2 frequency Used head coil with IR=415.0 15 internal slices with 3-D reconst 3.00mm slice thickness, 0 skip 192 x 256 matrix Contrast setting W=792-798, C=369-376 All images obtained using T-1 weighting
Variables in Imaging Head coil was necessary to obtain images Resolution was better than presented images
Next Step Options Explore impact of form on imaging (flat wire, strand, cable, shapes) Explore surface condition impact (plating, oxides, textures) Move on to other Modalities (Ultrasound)
Conclusions Novel pilot study to preemptively evaluate tissue equivalent characteristics before prototype devices This protocol may prove useful as reference data for diameter and material selection