Geometric QA Phantom
The ISIS QA-1 Phantom was designed to provide an easy, low-cost approach to the daily, monthly and annual QA tasks for the Physicist and Therapists. The ISIS QA-1 phantom will aid in verifying the geometric laser position accuracies with multiple laser systems within your department. The ISIS QA-1 also provides the Physicist and Dosimetrist the ability to verify electron beam density values produced by your CT / CT-Simulator. Staff members scan the four unique density value inserts, then transfer this image to the RTP system for verification of the electron density values of the Bone, Water, Inhale and Exhale Lung density inserts. Comparing the individual value for each known density value, the user can quickly verify CT image electron density values for treatment planning image QA.
Additionally, the ISIS QA-1 provides an internal known object insert that is scanned with the CT / CT-Simulator. With this multiple image slice set you can create a Treatment Plan / Virtual Simulation plan of the known object for size and location verification though your RTP and Virtual Simulation system. The ISIS QA-1 then goes one step further to use these known geometric phantom positions for verification of the laser positions as verified with the scanned ISIS QA-1 phantom. This QA process provides a geometric QA of the processed RT Plan for use with IMRT treatment machine lasers and mechanical treatment field setup verifications. The dose chamber insert will provide the physicists the ability to quickly measure single-point expected dose values without using additional phantom devices. This removable insert is matched to your existing standard dose chamber (model and manufacturer of chamber must be specified).
The ISIS QA-1 helps standardize the QA program for the installation engineer, maintenance engineer, therapist, dosimetrist and/or physicist. These QA tasks are accomplished by using a common single QA alignment/verification tool, thus producing a common geometric theme within the radiation therapy department prior to implementation of an IMRT or standard external beam treatment program. The continuing review of the geometric accuracy between all department systems is important with using today's high-quality and technical treatment protocols.