Table 3.

Mean gray values and standard deviations for the different materials in the pixel intensity insert are reported for different protocols on CS 9300 CBCT.

FOV ${\mathrm{cm}}^2$ (diameter × height)	Patient type	Al	PTFE	POM	LDPE	Air
$17\times 11$	Child	$885\pm 198$	$382\pm 141$	$9\pm 131$	$-299\pm 142$	$-637\pm 124$
	Adult small	$853\pm 190$	$403\pm 130$	$25\pm 117$	$-303\pm 132$	$-637\pm 114$
	Adult average	$811\pm 173$	$382\pm 118$	$12\pm 108$	$-307\pm 124$	$-642\pm 107$
	Adult large	$774\pm 165$	$305\pm 105$	$-54\pm 99$	$-351\pm 117$	$-698\pm 102$
$17\times 6$	Child	$1549\pm 211$	$662\pm 100$	$160\pm 81$	$-195\pm 70$	$-944\pm 57$
	Adult small	$1496\pm 196$	$637\pm 91$	$149\pm 71$	$-200\pm 63$	$-946\pm 55$
	Adult average	$1437\pm 182$	$600\pm 86$	$120\pm 65$	$-223\pm 57$	$-957\pm 49$
	Adult large	$1382\pm 174$	$547\pm 74$	$70\pm 57$	$-278\pm 50$	$-982\pm 33$
$8\times 8$	Child	$2370\pm 230$	$1258\pm 100$	$649\pm 84$	$242\pm 78$	$-634\pm 82$
	Adult small	$2160\pm 196$	$1132\pm 89$	$553\pm 73$	$143\pm 68$	$-688\pm 76$
	Adult average	$2007\pm 197$	$997\pm 85$	$414\pm 64$	$22\pm 60$	$-828\pm 65$
	Adult large	$1992\pm 157$	$980\pm 72$	$409\pm 61$	$18\pm 60$	$-815\pm 74$
$10\times 10$	Child	$2031\pm 241$	$1088\pm 118$	$545\pm 93$	$176\pm 82$	$-626\pm 84$
	Adult small	$1956\pm 217$	$1034\pm 108$	$495\pm 90$	$120\pm 77$	$-680\pm 83$
	Adult average	$1769\pm 197$	$922\pm 101$	$392\pm 81$	$-10\pm 82$	$-701\pm 85$
	Adult large	$1701\pm 195$	$834\pm 91$	$323\pm 69$	$-27\pm 61$	$-801\pm 66$
$10\times 5$	Child	$2287\pm 192$	$1142\pm 103$	$538\pm 92$	$113\pm 80$	$-771\pm 78$
	Adult small	$2398\pm 208$	$1219\pm 117$	$600\pm 102$	$177\pm 88$	$-723\pm 85$
	Adult average	$2285\pm 189$	$1141\pm 103$	$537\pm 92$	$125\pm 82$	$-770\pm 78$
	Adult large	$2210\pm 191$	$1062\pm 94$	$466\pm 81$	$43\pm 72$	$-852\pm 74$
$5\times 5$	Child	$666\pm 133$	$55\pm 77$	$-254\pm 67$	$-447\pm 61$	$-862\pm 56$
	Adult small	$586\pm 106$	$-5\pm 58$	$-304\pm 52$	$-494\pm 49$	$-902\pm 45$
	Adult average	$512\pm 88$	$-47\pm 50$	$-338\pm 46$	$-528\pm 44$	$-931\pm 41$
	Adult large	$512\pm 83$	$-73\pm 42$	$-365\pm 37$	$-558\pm 34$	$-949\pm 33$