For starters, the firm was showcasing ArcCHECK, a newly-released 4D detector array for rotational QA and dosimetry. "This is the first device possessing an isotropic geometry that's designed for use with any rotational technique," explained Roberto Casado, product specialist at Sun Nuclear. "This includes VMAT, TomoTherapy and RapidArc; and it can also perform QA for traditional IMRT."
The device comprises 1386 diode detectors with 1 cm spacing, creating a 21 cm long array with a diameter of 21 cm. Casado explained that the cylindrical detector array enables coherent measurement of the beams-eye-view dose distribution throughout the entire rotational delivery. This provides more data and thus a more thorough QA analysis.
Another highlight at Sun Nuclear's booth was its 3D Scanner - said to be the first circular water phantom tank for performing 3D dosimetry. The circular geometry enables the detector to maintain a consistent orientation for scans in the x, y and diagonal directions, with the detector's long axis remaining parallel to the beam edge throughout.
The system also sells itself on being simple to set-up and easy to use. It performs machine-assisted levelling and can automatically detect the beam centre and water surface. "The really big advantage of this automation, apart from saving time - and what this 3D water phantom was designed for - is that it removes all of the subjectivity introduced by the user," Casado told medicalphysicsweb.
The company plans to perform beta testing of the 3D Scanner in October, with commercial release predicted for early next year.
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