A CT simulator consists of a dedicated, fast CT scanner (often a spiral scanner), a virtual simulator (a set of computer software), and a laser marking device to mark the center of target volume. Therefore, methods of designing and implementing quality control procedures must include quality control on each segment of the process. Accuracy of table movements and lasers should also be checked to be within 1-millimeter accuracy.
Quality control of a virtual simulator is a very complex issue and difficult to verify, due to the nature of software quality. Since geometrical planning is the core of CT simulation, periodic quality control is essential for maintaining optimum image quality and patient care. Hence, the quality control of a virtual simulator consists of testing every segment of the software for possible flaws. A detailed description of such a process can be found in “A Practical Guide to CT Simulation.”1,2 The basic features which must be checked are reconstruction registration error (RRE), and geometrical accuracy in gantry, collimator and table simulations. The test should also include imaging parameters such as low contrast resolution and high contrast detect ability of a DRR.
Dimensions: 15 cm x 15 cm (5.906 in x 5.906 in)
Weight: 4.19 kg (9.24 lb)
1. K.P., McGee, I.J. Das, “Commissioning Acceptance Testing and Quality Assurance of a CT Simulator,” in A Practical Guide to CT Simulation,” L.R. Coia, T.E. Schultheiss, and G.E. Hanks, eds. (Madison, WI.: Advanced Medical Publishing, 1995), 39-50. 2. K.P., McGee, I.J. Das, C. Sims, “Evaluation of Digitally Reconstructed Radiographs (DRRs) Used for Clinical Radiotherapy: A Phantom Study,” Medical Physics, 22 (1995),1815-1827.