General Medical Physics Services

Full-range and quality routine medical physics services, backed by a strong group of experienced physicists and certified dosimetrists

  • Daily and monthly QA programs for CT and treatment machines
  • 3D CRT, IMRT, VMAT, SBRT, and SRS treatment planning (on-site and remote)
  • Quality control of the entire radiation treatment process, including plan verification and weekly chart checks
  • Development of technical advances
  • Consultation of routine physics and technical issues
  • Networked support from the entire physics group

Commissioning of Treatment Machines and Planning Software

Fast, accurate, and turnkey linac and RTPS beam data commissioning services to help expedite the process of getting your new machine ready for clinical usage and to receive a treatment permit from the State

  • 30+ years of experience in registering treatment machines with the State of California (We can normally provide acceptance testing, commissioning, and all State documents within ten days of acceptance)
  • Fast and comprehensive commissioning process, thanks to company-owned state-of-the-art 2D/3D beam scanning systems and a well developed, efficient process
  • Capable of commissioning fields as small as 4mm for stereotactic programs with company-owned stereotactic ion chambers and diodes and the TMR scanner
  • Accurate machine output calibration for all photon and electron energies following the AAPM TG-51 protocol
  • Complete commissioning report and beam data book
  • Commissioning of machine data in the treatment planning system with thorough verification and end-to-end IMRT/VMAT testing
  • Independent output verification using the OSLD service from IROC (an MD Anderson program)

HDR Brachytherapy Program

A unique, “worry-free”, and full-service program that provides all your needs for HDR delivery at a fraction of the cost of supporting your own program

For over 23 years, Photon Physics Services has provided mobile High Dose Rate Brachytherapy services to clinics and hospitals in the greater Los Angeles area. HDR is the standard of care for many types of cancer. This unique shared service allows centers to offer HDR treatments for a fraction of the cost of supporting your own program. We supply it all for you, including the HDR unit, applicators, treatment planning system, and most importantly, decades of experience.

We offer HDR treatments for the following cancers:

  • Breast (Accelerated Partial Breast Irradiation)
  • Prostate
  • Gynecological
  • Lung
  • Esophageal
  • Skin

Annual Linear Accelerator Calibrations

Fast, accurate, and comprehensive annual calibration of linacs following TG-51 and TG-142 protocols to ensure safe usage of your treatment machine and precise results from your planning system

Our standard annual linac calibration includes, but is not limited to, the following items:

  • Machine functionality, safety interlock, and integrity
  • Mechanical readout accuracy for all gantry, collimator, and couch settings
  • Isocenter verification for gantry, collimator, and table rotation
  • Light field and radiation field congruence
  • Photon/electron output factor versus field size for each beam energy
  • Output constancy versus gantry angle, dose rate, and MU setting
  • Transmission factor for all treatment accessories
  • TG-51 photon & electron beam output calibrations
  • Percent Depth Dose constancy and off-axis factor constancy for all photon and electron energies
  • Baselines for daily and monthly output checks
  • Machine imager QA for EPID and OBI

Radiation Consultation

Consultation service for your needs in radiation safety, facility design, and other therapeutic medical physics related issues from a group of experienced medical physicists with various specialties

We are also experienced in leading the department through the process of JCAHO, State, ACRO, and ACR accreditation.

We provide consultation services to our contracted radiation oncology facilities and to our medical physics colleagues. Please feel free to contact us anytime here.