Product Development
In my role as a technical product manager at a radiation therapy quality assurance company, I have had the opportunity to lead a talented team of engineers in the full-cycle development and release of innovative radiation measurement devices. Our work embodies almost the entire suite of quality assurance measurement devices found in radiation therapy clinics. These devices are used for commissioning patient planning systems and for routine quality assurance of radiation delivery systems.
Water Scanners
I led development of one and three-dimensional water scanning systems, controlling software and accessories. The Software was designed to control motorized drives which scan radiation detectors through a water bath. Deposited dose is mapped throughout the radiation field. Accessories developed to support scanner functionality include: a) TPR accessory, b) submersible linear detector array, c) portable 50-gallon water transfer system and d) transportation cases. Water scanners are used for quality assurance, constancy checks and commissioning of treatment planning system software.
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LINAC Quality Assurance
I led development of ion chamber and diode detector arrays for LINAC QA along with controlling software and accessories. Accessories developed include: a) mounting fixtures, b) mounting fixture adapter plates and c) specialized buildup plates to monitor energy changes of the LINAC.
These products report the dosimetric "health" of the accelerator as a function of time.
 Water Phantom for Patient PlanningA water phantom measures radiation device output and formats the position and dose data in preparation for use in patient treatment planning. |
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 ReservoirA portable water storage container is required in TPR measurements and assists in water transfer during water phantom setup and tear down. |
 Submersible Detector ArraySubmersible detector arrays are water phantom accessories used to measure large and dynamic radiation fields quickly and consistently. |
 Water Height MonitorMagneto-restrictive sensors can be used to correlate the amount of water over the detector to the measured dose in the radiation detector. |
 Water Phantom SoftwareMark managed thirty-one software releases including eleven major releases. Scanning software schedules scans, controls measurement and processes data. |
 Water Phantom for LINAC QAWater phantom used to change the depth of a radiation detector in water. Water Phantoms are required for monthly and annual QA. |
 Large Field Profile MeasurementMark worked with Varian Medical Systems and Elekta Ltd. LINAC manufacturers to develop a detector array for their manufacturing departments. |
 Small Field Profile MeasurementSRS Detector array used for small radiation field measurement to quantify/qualify LINAC output. |
 Mounting FixturesMounting fixtures designed to hold detector arrays to the head of the accelerator. |
 Profile Measurement SoftwareMark led eleven releases focused on achieving and maintaining OEM business. Detector array software profiles radiation deliveries with time. |
 Small Field Patient Treatment QADetector arrays map radiation patterns prior to patient treatment and software allows comparison with planned delivery to insure consistency. |
 Large Field Patient Treatment QADetector arrays map radiation patterns prior to patient treatment and software allows comparison with planned delivery to insure consistency. |
 Large Field Patient Treatment QADetector arrays map radiation patterns prior to patient treatment and software allows comparison with planned delivery to insure consistency. |
 Daily LINAC QARadiation detection device used to measure key LINAC properties on a daily basis. |
 Daily LINAC QAA single measurement detector, electrometer and visual display provide an integrated LINAC output QA tool. |
 ElectrometerTwo channel reference electrometer used for calibrating the output of linear accelerators and routine QA. |
Patient Treatment Quality Assurance
I contributed to the development of three evolutions of patient treatment quality assurance hardware packages authoring and verifying requirements. These devices measure radiation dictated by the treatment planning system. Dosimetric results are displayed in a map and compared against the planned delivery. Analytical tools are provided to help medical physicists decide the accuracy of delivery.