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mapcheck qa device  (Sun Nuclear Corporation)
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Sun Nuclear Corporation mapcheck qa device
Percentage depth dose (PDD) of the 6-MV photon 15 cm × 15 cm GRID filed, through the central opening of the GRID collimator. The GRID factor is defined as the ratio of dose at D max of a GRID field of given size and dose at D max of a 10 × 10 cm field under machine output calibration condition, times the machine output factor of 1 cGy/MU. We determined the relative dose ratio by measuring the dose on the central diode detector of a <t>MapCHECK</t> array system from a given GRID field radiation and a 10 × 10 cm field radiation under the same setup (100 cm SSD, central axis, with no additional build-up). We assumed that the depth difference between 6 MV D max (1.5 cm) and the measurement depth (2 cm) has negligible effect on the relative GRID factor measurement. SSD = Source to surface distance.
Mapcheck Qa Device, supplied by Sun Nuclear Corporation, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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mapcheck qa device - by Bioz Stars, 2026-03
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Percentage depth dose (PDD) of the 6-MV photon 15 cm × 15 cm GRID filed, through the central opening of the GRID collimator. The GRID factor is defined as the ratio of dose at D max of a GRID field of given size and dose at D max of a 10 × 10 cm field under machine output calibration condition, times the machine output factor of 1 cGy/MU. We determined the relative dose ratio by measuring the dose on the central diode detector of a MapCHECK array system from a given GRID field radiation and a 10 × 10 cm field radiation under the same setup (100 cm SSD, central axis, with no additional build-up). We assumed that the depth difference between 6 MV D max (1.5 cm) and the measurement depth (2 cm) has negligible effect on the relative GRID factor measurement. SSD = Source to surface distance.

Journal: Technology in Cancer Research & Treatment

Article Title: Outcomes of Spatially Fractionated Radiotherapy (GRID) for Bulky Soft Tissue Sarcomas in a Large Animal Model

doi: 10.1177/1533034617690980

Figure Lengend Snippet: Percentage depth dose (PDD) of the 6-MV photon 15 cm × 15 cm GRID filed, through the central opening of the GRID collimator. The GRID factor is defined as the ratio of dose at D max of a GRID field of given size and dose at D max of a 10 × 10 cm field under machine output calibration condition, times the machine output factor of 1 cGy/MU. We determined the relative dose ratio by measuring the dose on the central diode detector of a MapCHECK array system from a given GRID field radiation and a 10 × 10 cm field radiation under the same setup (100 cm SSD, central axis, with no additional build-up). We assumed that the depth difference between 6 MV D max (1.5 cm) and the measurement depth (2 cm) has negligible effect on the relative GRID factor measurement. SSD = Source to surface distance.

Article Snippet: The GRID factor is a function of field size and photon energy (6 and 10 MV) is measured using an ion chamber (PTW 30013 Waterproof Farmer Chamber; RD Inc, Albertville, Minnesota) and Mapcheck QA device (Sun Nuclear Corp, Melbourne, Florida).

Techniques: