Table 4.

Summary of reported BSF measurements using novel detectors

Study	Machine	Beam Quality (HVL)	Detector	Reference Data	Maximum Difference to Reference Data	Measurement Uncertainty
${\text{Butson and Cheung}}^{(3)}$	Gulmay D3300	50–150 kV $(1.4\text{mm}\text{Al}-0.6\text{mm}\text{Cu})$	GAFCHROMIC EBT	IPEM	1.8%	Not given
${\text{Kim et al}.}^{(4)}$	Pantak DXT300	50,100,280 kV $(1.5\text{mm}\text{Al}-3.2\text{mm}\text{Cu})$	GAFCHROMIC EBT	AAPM	2%	2.5%
${\text{Smith et al}.}^{(5)}$	Pantak DXT300	50,100,280 kV $(1.5\text{mm}\text{Al}-3.2\text{mm}\text{Cu})$	GAFCHROMIC EBT2	AAPM	3.5%	4.0%
${\text{Nelson and Hill}}^{(17)}$	Pantak Therapax (DXT) 300	75–300 kV $(2.2\text{mm}\text{Al}-3.2\text{mm}\text{Cu})$	LiF TLD	AAPM & IPEM	$~6\%$	$1.1\%-4.7\%$
${\text{Mart et al}.}^{(6)}$	Gulmay D3100	20, 100 kV (0.08, 4.0 mm Al)	GAFCHROMIC EBT2	AAPM a IPEM	11%, 7%	$2\%-7\%$
			OSLD	AAPM a IPEM	14%	$1\%-10\%$
This study (2013)	Gulmay D3225	60–220 kV $(1.3\text{mm}\text{Al}-2.2\text{mm}\text{Cu})$	GAFCHROMIC EBT2	IPEM	1.9%	3.2%

^aOriginally, data for 20 kV were compared to a very old publication (BJR supplement 10, 1961) which has since been updated three times and currently (BJR supplement 25, 1996) agrees with AAPM code of practice data within 1%. Therefore current AAPM code of practice values are used for this comparison.