Nuclear Medicine Expert Witnesses: 2

David N. Tran, MD, is a Doctor of Medicine who specializes in Diagnostic and Interventional Radiology. Dr. Tran attended Stanford University for medical school and completed additional training at UCSF for Radiology and Interventional Radiology. He currently practices at St Johns Health Center in Los Angeles, CA. 

Dr. Tran's clinical expertise is in Image Guided Cancer Therapies, including liver directed Y90 radioembolization and tumor ablations.  He also performs a wide spectrum of endovascular surgeries for vascular disease, fibroid disease, and benign prostate hypertrophy.

Litigation Support: Dr. Tran offers expert witness services to attorneys representing plaintiff and defendant. He performs independent medical examinations, second opinons, and litigation support. He is available for depositions and trial testimony as needed.

Areas of Expertise:

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 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. 

Dr. Gossman 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, Dr. Gossman 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, Dr. 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