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Radiation Safety Expert Witnesses

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John D. Baker, MD, FACC, FACP, FSCAI
4790 Irvine Blvd. #105-141
Irvine CA 92620-1973
USA
phone: 877- 924-9009
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John D. Baker, MD, FACC, FACP, FSCAI, is dual Board Certified in Cardiology and Interventional Cardiology by the American Board of Internal Medicine. Actively practicing, he has over 20 years of experience in Cardiology, Invasive and Interventional Cardiology.. Dr. Baker is currently the Director of Cardiac Catheterization Laboratories and Invasive/Interventional Cardiology for Anaheim Regional Medical Center.

Dr. Baker provides evidence based opinions regarding the medical facts of each case, for attorneys representing both Plaintiff and Defense. His services include medical record review for causation, angiogram review, depositions, expert testimony, written reports with writing including statements of merit, case summary opinions, and affidavits.

Dr. Baker also has extensive experience in peer review, in his capacities as prior Chair of Invasive Cardiology, organizing and maintaining high quality accurate peer review for Anaheim Memorial Medical Center, and redesigning the process to meet the Joint Commission's (JCAHO) Standards. He performs guideline and evidence-based reviews and depositions in all areas of Cardiology nationwide.

Areas of Expertise:
  • Medical Malpractice
  • Coronary Heart Disease
  • Stents
  • PTCA
  • Pacemakers
  • Angioplasty
  • Myocardial Infarction
  • Radiation Safety
  • Congestive Heart Failure
  • Fluoroscopy
  • Rotablators
  • Laser Atherectomy
  • View Dr. Baker's Consulting Profile.
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    Luiz Hargreaves
    AAS, MD, MBA, MSc, MA
    Orlando FL
    USA
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    Management and Homeland Security.

    Dr. Hargreaves is a Brazilian emergency physician, holding an MA in Security Management (Webster University) and an MS in Political Science with a focus in International Terrorism. His passion for the field of Crisis and Disaster Preparedness having been engaged for some years as Director of the Medical Department at the Brazilian House of Representatives as well as the Emergency Coordinator of the Special Operations Unit.



    His previous experience extends to planning and managing emergency response operations, disaster preparedness and homeland security, including five presidential inaugurations, mass gathering, sporting and entertainment events involving many celebrities and some official visits by Heads of State and other authorities.



    In the Academic field, he has lectured at different Universities and worked as speaker in many conferences abroad. He also has many years of experience as a Professor and Academic Coordinator for several Graduate programs. He is the author of various books and articles in the field of disaster preparedness, crisis management, and Homeland Security.

    Core Competencies:

    • Emergency and Disaster Preparedness

    • Crisis Management

    • Event Safety & Security

    • Homeland Security / CBRNE

    • Multicultural Team Integration

    • Online Education

    • Public Safety

    • Organizational Security

    • Political Science Languages Spoken: Portuguese, English, Spanish,French (Basic) and Italian (Basic).

    Areas of Expertise:
  • Crisis Management
  • Public Safety
  • Emergency Preparedness
  • Disaster Preparedness, Response and Recovery
  • Health Care and Hospital Management
  • Hospital Disaster Plan
  • Security Event
  • Emergency Planning for Mass Gathering Events
  • Disaster Preparedness
  • 1/27/2016 · Crisis Management
    As an emergency professional, we are prepared to deal with unexpected situations, including disasters. Every time we hear about potential or real crisis, we automatically review the procedures in our minds and the desire to help is enormous. On many occasions, I would like to go directly to a scene to assist the victims and my peers. I believe that this feeling is not different among everyone involved in this field.

    10/21/2015 · Crisis Management
    Some articles have been written over the years about panic in disasters and fires. The idea that panic rarely occurs in disasters has been readily accepted. When disasters happen, usually, people act in such a way to show solidarity with the other victims. It is common to see some degree of organization in order to assist searches and reconstruction work.

    In 1903, a fire killed more than 600 people in the Iroquois Theater in Chicago. Most of the victims were children. Among the causes of this tragedy were inadequate emergency exits, insufficient and poorly signposted, overcrowding, lack of fire protection equipment and even suspicion of bribery of persons responsible for overseen the safety conditions of the Theater.

    2/11/2013 · Crisis Management
    The proverb above has received different versions, including this one credited to Benjamin Franklin. A kingdom lost because of a nail. We could also say, a disaster caused by a simple problem that could have been avoided.

    11/2/2012 · Crisis Management
    It is usual to find on beaches, sand castles being built. They arouse the curiosity of many, especially children and are really true masterpieces. However, the more elaborate and larger they are, the easier it is for them to be destroyed, what ends up constituting a paradox. The more sophisticated, the more fragile.

    11/23/2010 · Crisis Management
    There once was a fire in a forest, the animals were in panic… they saw a hummingbird going towards the river, picking up some water in order to try to extinguish the fire. He repeated this gesture frequently and thoroughly.

    11/23/2010 · Crisis Management
    In recent years, organizations have increasingly been incorporating strategic planning into management. All organizations, including State(s), have missions, values and visions. In other words, it is necessary for everyone in these organizations to understand what it means to work for this corporation or what it means to be a government employee.

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    Michael S. Gossman, MS, DABR, FAAPM
    Chief Medical Physicist & RSO
    Regulation Directive Medical Physics
    104 Hildeen Court
    Russell KY 41169
    USA
    phone: 606-232-9283 (cell)
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    COMPANY DESCRIPTION:
    • Expert Witness - Medical malpractice, misadministration, medical event (Radiation Oncology, Radiology, Nuclear Medicine)
    • Expert Witness - Radiation exposure, radiation dose, radioactivity and radiobiological calculations
    • Expert Witness – Patent infringement (intellectual property all categories)
    • Expert Witness – Medical physics, supervision of (medical physicist, dosimetrist, radiation therapist, radiologic technologist)
    • Expert Witness - Termination of employment
    Michael Gossman Medical Physicist Expert PhotoMichael S. Gossman, M.S., DABR, FAAPM, is a Board Certified Qualified Expert Medical Physicist, an honorary Fellow of the American Association of Physicists in Medicine (AAPM), and currently the Chief Medical Physicist & Radiation Safety Officer (RSO) in Radiation Oncology at Tri-State Regional Cancer Center in Ashland, KY.

    Chief Gossman is extra-professionally an Accreditation Site Reviewer for the American College of Radiation Oncology (ACRO) and the American College of Radiology (ACR), was a 2-term Ohio River Valley Chapter President of the AAPM, and formerly a Graduate School Professor of Clinical Medical Physics at Wright State University. He is the highest ranking scientist in medicine and has been in the field for 17 years.

    Chief Gossman's expertise involves the safe, effective and precise delivery of radiation to achieve the therapeutic result prescribed in patient care by radiation oncologists striving to treat cancer patients with particle accelerators and radioactive material. Extra-professionally, he is retired as the Interim Editor-in-Chief and Editorial Board Member for the Medical Dosimetry Journal, Editorial Board Member for the Journal of Applied Clinical Medical Physics, and served four years as a Medical Consultant to the U.S. Nuclear Regulatory Commission.

    Chief Gossman is directly and ultimately responsible for all technical and scientific aspects of cancer treatment. He directly supervises and oversees efforts from staff medical physicists, dosimetrists, radiation therapists and x-ray technologists. As an expert in radiation detector measurements, particle accelerator and radioactive material calibrations, and radioactive material handling, Mr. Gossman is a highly respected medical physicist by medical physicists nationally. He is also the owner of the Radiation Oncology Medical Physics consulting company Regulation Directive Medical Physics, LLC and employed extraprofessionally as a Senior Managing Scientist at Exponent, Inc. for medical device testing and expert witness efforts.

    Services Provided:
    • Medical expert witness
    • Medical consultant
    • Legal consultant
    • Review of: medical event, malpractice, and misadministration
    • Regulatory compliance
    • Investigation and audits
    • Independent medical evaluation of the probable deterministic effects of radiation exposures
    • Facility practice vs. standards review
    • Accreditation preparation
    • Shielding calculations
    • Accelerator acceptance testing & commissioning
    • Quality assurance
    • Peer review of the Chief Medical Physicist
    • Radiation measurements
    • Radiation calculations
    • Radiation safety
    • Dose determination
    • Calibration of medical accelerators
    • Treatment planning
    • Calculation of time and dose for treatment
    • Handling, shipping, receiving, and storing radioactive material
    • Calibrating radioactive material
    • Regulatory compliance
    • Interpretation of bioassay results and other data related to radiation exposure
    • Calculation of internal and external radiation doses, as necessary
    Regulation Directive Medical Physics
    104 Hildeen Court
    Russell, Kentucky, 41169
    Telephone: 606-232-9283
    Website: http://www.rdmpllc.com
    Tri-State Regional Cancer Center
    Department of Radiation Oncology
    706 23rd Street
    Ashland, KY 41101
    Telephone: 606-232-9283
    8/6/2013 · Medical
    Cochlear implants, via direct electrical stimulation of the auditory nerve, allow the restoration of hearing and speech recognition in both adults and children having sensorineural deafness. These devices typically contain both extemal components (speech processor, microphone, transmitter) and intemal components (including the cochlear stimulator and electrode array), which are surgically placed under the skin behind the ear and in the cochlea.

    7/18/2013 · Radiology
    Inadequate research exists regarding testing of a ventricular assist device (VAD) for susceptibility to radiation damage. Specifically, minimal data are available to radiation oncologists prescribing treatment plans for patients with an implanted VAD. As the number of implanted devices increases, patients requiring radiation at tissue sites near or at the device will increase.

    6/28/2013 · Medical
    Improved outcomes and quality of life of heart failure patients have been reported with the use of left ventricular assist devices (LVADs).

    1/8/2013 · Radiology
    New research shows the effects of electron beams on implanted vascular access ports composed of plastic, determining how they impair the fluence of radiation around them.

    10/23/2012 · Radiology
    Abstract. Object: Where no society-based or manufacturer guidance on radiation limits to neuromodulation devices is available, this research provides the groundwork for neurosurgeons and radiation oncologists who rely on the computerized treatment plan clinically for cancer patients.

    7/25/2012 · Medical Physics
    Abstract-The medical community is advocating for progressive improvement in the design of implantable cardioverter-defibrillators and implantable pacemakers to accommodate elevations in dose limitation criteria.

    5/14/2012 · Radiology
    Since the first commercial multichannel cochlear implant was marketed by Cochlear in 1985 (1), use of the device has grown exponentially. As of mid-2010, more than 188,000 people worldwide have received a cochlear implant system (2). Recent developments in the manufacturing of cochlear implants by the market leader, Cochlear Limited (based in Australia), have resulted in an aim to provide electronically stable models (3).

    3/13/2012 · Medical Physics
    We detail, derive and correct the technical use of the solid angle variable identified in formal guidance that relates skyshine calculations to dose-equivalent rate.

    12/5/2011 · Radiology
    Abstract -- In order to determine a mouse's dose accurately and prior to engaging in live mouse radiobiological research, a tissue-equivalent tumor-bearing phantom mouse was constructed and bored to accommodate detectors. Comparisons were made among four different types of radiation detectors, each inserted into the mouse phantom for radiation measurement under a 6 MV linear accelerator beam.

    9/9/2011 · Radiology
    Skyshine radiation emanating from medical accelerator facilities is a phenomenon not well understood.

    7/22/2011 · Medical Physics
    In the process of radiation oncology department accreditation, surveyors pay close attention to continuous quality improvement in the clinical section.

    1/3/2010 · Medical Physics
    As promulgated by the Nuclear Regulatory Commission, packaging regulations for radioactive material are confusing (e.g., “activity” vs “contained” activity vs “total” activity). As a consequence, medical physicists are forced to secondguess the intent of the regulations.

    1/2/2010 · Medical Physics
    Recent improvements to the functionality and stability of implantable pacemakers and cardioverter-defibrillators involve changes that include efficient battery power consumption and radiation hardened electrical circuits. Manufacturers have also pursued MRI-compatibility for these devices

    12/31/2009 · Medical Physics
    Vascular access ports are used widely in the administering of drugs for radiation oncology patients. Their dosimetric effect on radiation therapy delivery in photon beams has not been rigorously established. In this work, the effects on external beam fields when any of a variety of vascular access ports were included in the path of a high energy beam are studied. This study specifically identifies sidescatter and backscatter consequences as well as attenuation effects.

    Edited by Oliver Vonend & Siegfried Eckert
    Michael Gossman is the author of Chapter 9: Clinical Concerns For and Strategies With Pacemakers in Radiation Oncology
    Authors: Todd Pawlicki, et al; Editors; Michael Gossman (Ch. 19), et al
    This comprehensive work highlights benefits of quality techniques, approaches to implementation, and guidelines for specific quality assurance steps related to equipment and procedures used in radiotherapy. After an overview of manufacturing and engineering techniques, the text addresses quality and safety issues in radiotherapy from both the physician and physicist viewpoints.