id	sid	tid	token	lemma	pos
qb98mc9033z	1	1	obtaining	obtain	VERB
qb98mc9033z	1	2	accurate	accurate	ADJ
qb98mc9033z	1	3	computerized	computerized	ADJ
qb98mc9033z	1	4	tomography	tomography	NOUN
qb98mc9033z	1	5	(	(	PUNCT
qb98mc9033z	1	6	ct	ct	NOUN
qb98mc9033z	1	7	)	)	PUNCT
qb98mc9033z	1	8	images	image	NOUN
qb98mc9033z	1	9	is	be	AUX
qb98mc9033z	1	10	particularly	particularly	ADV
qb98mc9033z	1	11	critical	critical	ADJ
qb98mc9033z	1	12	for	for	SCONJ
qb98mc9033z	1	13	doctor	doctor	NOUN
qb98mc9033z	1	14	to	to	PART
qb98mc9033z	1	15	diagnose	diagnose	VERB
qb98mc9033z	1	16	disease	disease	NOUN
qb98mc9033z	1	17	.	.	PUNCT
qb98mc9033z	2	1	however	however	ADV
qb98mc9033z	2	2	,	,	PUNCT
qb98mc9033z	2	3	the	the	DET
qb98mc9033z	2	4	facts	fact	NOUN
qb98mc9033z	2	5	that	that	SCONJ
qb98mc9033z	2	6	the	the	DET
qb98mc9033z	2	7	x	x	NOUN
qb98mc9033z	2	8	-	-	NOUN
qb98mc9033z	2	9	ray	ray	NOUN
qb98mc9033z	2	10	beam	beam	NOUN
qb98mc9033z	2	11	produced	produce	VERB
qb98mc9033z	2	12	by	by	ADP
qb98mc9033z	2	13	x	x	NOUN
qb98mc9033z	2	14	-	-	NOUN
qb98mc9033z	2	15	ray	ray	NOUN
qb98mc9033z	2	16	tube	tube	NOUN
qb98mc9033z	2	17	has	have	AUX
qb98mc9033z	2	18	a	a	DET
qb98mc9033z	2	19	widely	widely	ADV
qb98mc9033z	2	20	distributed	distribute	VERB
qb98mc9033z	2	21	energy	energy	NOUN
qb98mc9033z	2	22	spectrum	spectrum	NOUN
qb98mc9033z	2	23	and	and	CCONJ
qb98mc9033z	2	24	the	the	DET
qb98mc9033z	2	25	absorption	absorption	NOUN
qb98mc9033z	2	26	coefficient	coefficient	NOUN
qb98mc9033z	2	27	of	of	ADP
qb98mc9033z	2	28	materials	material	NOUN
qb98mc9033z	2	29	has	have	VERB
qb98mc9033z	2	30	a	a	DET
qb98mc9033z	2	31	dependence	dependence	NOUN
qb98mc9033z	2	32	on	on	ADP
qb98mc9033z	2	33	photon	photon	NOUN
qb98mc9033z	2	34	energy	energy	NOUN
qb98mc9033z	2	35	result	result	NOUN
qb98mc9033z	2	36	in	in	ADP
qb98mc9033z	2	37	beam	beam	NOUN
qb98mc9033z	2	38	hardening	hardening	NOUN
qb98mc9033z	2	39	artifacts	artifact	NOUN
qb98mc9033z	2	40	.	.	PUNCT
qb98mc9033z	3	1	the	the	DET
qb98mc9033z	3	2	artifacts	artifact	NOUN
qb98mc9033z	3	3	inhibit	inhibit	VERB
qb98mc9033z	3	4	the	the	DET
qb98mc9033z	3	5	measurement	measurement	NOUN
qb98mc9033z	3	6	from	from	ADP
qb98mc9033z	3	7	establishing	establish	VERB
qb98mc9033z	3	8	a	a	DET
qb98mc9033z	3	9	reliable	reliable	ADJ
qb98mc9033z	3	10	scale	scale	NOUN
qb98mc9033z	3	11	for	for	ADP
qb98mc9033z	3	12	ct	ct	NOUN
qb98mc9033z	3	13	images	image	NOUN
qb98mc9033z	3	14	.	.	PUNCT
qb98mc9033z	4	1	we	we	PRON
qb98mc9033z	4	2	investigated	investigate	VERB
qb98mc9033z	4	3	the	the	DET
qb98mc9033z	4	4	beam	beam	NOUN
qb98mc9033z	4	5	hardening	hardening	NOUN
qb98mc9033z	4	6	effect	effect	NOUN
qb98mc9033z	4	7	contributed	contribute	VERB
qb98mc9033z	4	8	from	from	ADP
qb98mc9033z	4	9	soft	soft	ADJ
qb98mc9033z	4	10	tissue	tissue	NOUN
qb98mc9033z	4	11	and	and	CCONJ
qb98mc9033z	4	12	bone	bone	NOUN
qb98mc9033z	4	13	with	with	ADP
qb98mc9033z	4	14	x	x	NOUN
qb98mc9033z	4	15	-	-	NOUN
qb98mc9033z	4	16	ray	ray	NOUN
qb98mc9033z	4	17	spectra	spectra	NOUN
qb98mc9033z	4	18	emitted	emit	VERB
qb98mc9033z	4	19	from	from	ADP
qb98mc9033z	4	20	x	x	NOUN
qb98mc9033z	4	21	-	-	NOUN
qb98mc9033z	4	22	ray	ray	NOUN
qb98mc9033z	4	23	tube	tube	NOUN
qb98mc9033z	4	24	at	at	ADP
qb98mc9033z	4	25	four	four	NUM
qb98mc9033z	4	26	high	high	ADJ
qb98mc9033z	4	27	voltages	voltage	NOUN
qb98mc9033z	4	28	:	:	PUNCT
qb98mc9033z	4	29	80kev	80kev	NUM
qb98mc9033z	4	30	,	,	PUNCT
qb98mc9033z	4	31	100kev	100kev	NUM
qb98mc9033z	4	32	,	,	PUNCT
qb98mc9033z	4	33	120kev	120kev	NUM
qb98mc9033z	4	34	and	and	CCONJ
qb98mc9033z	4	35	140kev	140kev	NUM
qb98mc9033z	4	36	.	.	PUNCT
qb98mc9033z	5	1	a	a	DET
qb98mc9033z	5	2	polynomial	polynomial	NOUN
qb98mc9033z	5	3	was	be	AUX
qb98mc9033z	5	4	first	first	ADV
qb98mc9033z	5	5	generated	generate	VERB
qb98mc9033z	5	6	to	to	PART
qb98mc9033z	5	7	represent	represent	VERB
qb98mc9033z	5	8	the	the	DET
qb98mc9033z	5	9	deviation	deviation	NOUN
qb98mc9033z	5	10	of	of	ADP
qb98mc9033z	5	11	polyenergetic	polyenergetic	ADJ
qb98mc9033z	5	12	projection	projection	NOUN
qb98mc9033z	5	13	data	datum	NOUN
qb98mc9033z	5	14	with	with	ADP
qb98mc9033z	5	15	respect	respect	NOUN
qb98mc9033z	5	16	to	to	ADP
qb98mc9033z	5	17	ideal	ideal	ADJ
qb98mc9033z	5	18	monoenergetic	monoenergetic	ADJ
qb98mc9033z	5	19	projection	projection	NOUN
qb98mc9033z	5	20	.	.	PUNCT
qb98mc9033z	6	1	when	when	SCONJ
qb98mc9033z	6	2	the	the	DET
qb98mc9033z	6	3	phantom	phantom	NOUN
qb98mc9033z	6	4	contained	contain	VERB
qb98mc9033z	6	5	both	both	DET
qb98mc9033z	6	6	materials	material	NOUN
qb98mc9033z	6	7	,	,	PUNCT
qb98mc9033z	6	8	applying	apply	VERB
qb98mc9033z	6	9	soft	soft	ADJ
qb98mc9033z	6	10	tissue	tissue	NOUN
qb98mc9033z	6	11	and	and	CCONJ
qb98mc9033z	6	12	bone	bone	NOUN
qb98mc9033z	6	13	polynomial	polynomial	ADJ
qb98mc9033z	6	14	correction	correction	NOUN
qb98mc9033z	6	15	successively	successively	ADV
qb98mc9033z	6	16	was	be	AUX
qb98mc9033z	6	17	not	not	PART
qb98mc9033z	6	18	able	able	ADJ
qb98mc9033z	6	19	to	to	PART
qb98mc9033z	6	20	fully	fully	ADV
qb98mc9033z	6	21	remove	remove	VERB
qb98mc9033z	6	22	the	the	DET
qb98mc9033z	6	23	beam	beam	NOUN
qb98mc9033z	6	24	hardening	harden	VERB
qb98mc9033z	6	25	artifacts	artifact	NOUN
qb98mc9033z	6	26	.	.	PUNCT
qb98mc9033z	7	1	the	the	DET
qb98mc9033z	7	2	reason	reason	NOUN
qb98mc9033z	7	3	is	be	AUX
qb98mc9033z	7	4	that	that	SCONJ
qb98mc9033z	7	5	soft	soft	ADJ
qb98mc9033z	7	6	tissue	tissue	NOUN
qb98mc9033z	7	7	path	path	NOUN
qb98mc9033z	7	8	length	length	NOUN
qb98mc9033z	7	9	as	as	ADV
qb98mc9033z	7	10	well	well	ADV
qb98mc9033z	7	11	as	as	ADP
qb98mc9033z	7	12	bone	bone	NOUN
qb98mc9033z	7	13	path	path	NOUN
qb98mc9033z	7	14	length	length	NOUN
qb98mc9033z	7	15	affect	affect	VERB
qb98mc9033z	7	16	the	the	DET
qb98mc9033z	7	17	extent	extent	NOUN
qb98mc9033z	7	18	of	of	ADP
qb98mc9033z	7	19	beam	beam	NOUN
qb98mc9033z	7	20	hardening	harden	VERB
qb98mc9033z	7	21	simultaneously	simultaneously	ADV
qb98mc9033z	7	22	.	.	PUNCT
qb98mc9033z	8	1	a	a	DET
qb98mc9033z	8	2	correction	correction	NOUN
qb98mc9033z	8	3	table	table	NOUN
qb98mc9033z	8	4	with	with	ADP
qb98mc9033z	8	5	both	both	DET
qb98mc9033z	8	6	bone	bone	NOUN
qb98mc9033z	8	7	and	and	CCONJ
qb98mc9033z	8	8	tissue	tissue	NOUN
qb98mc9033z	8	9	dimension	dimension	NOUN
qb98mc9033z	8	10	was	be	AUX
qb98mc9033z	8	11	then	then	ADV
qb98mc9033z	8	12	developed	develop	VERB
qb98mc9033z	8	13	.	.	PUNCT
qb98mc9033z	9	1	the	the	DET
qb98mc9033z	9	2	polynomial	polynomial	ADJ
qb98mc9033z	9	3	and	and	CCONJ
qb98mc9033z	9	4	the	the	DET
qb98mc9033z	9	5	table	table	NOUN
qb98mc9033z	9	6	correction	correction	NOUN
qb98mc9033z	9	7	were	be	AUX
qb98mc9033z	9	8	incorporated	incorporate	VERB
qb98mc9033z	9	9	into	into	ADP
qb98mc9033z	9	10	a	a	DET
qb98mc9033z	9	11	statistical	statistical	ADJ
qb98mc9033z	9	12	model	model	NOUN
qb98mc9033z	9	13	on	on	ADP
qb98mc9033z	9	14	which	which	PRON
qb98mc9033z	9	15	an	an	DET
qb98mc9033z	9	16	iterative	iterative	ADJ
qb98mc9033z	9	17	reconstruction	reconstruction	NOUN
qb98mc9033z	9	18	algorithm	algorithm	PROPN
qb98mc9033z	9	19	was	be	AUX
qb98mc9033z	9	20	based	base	VERB
qb98mc9033z	9	21	.	.	PUNCT
qb98mc9033z	10	1	since	since	SCONJ
qb98mc9033z	10	2	the	the	DET
qb98mc9033z	10	3	correction	correction	NOUN
qb98mc9033z	10	4	term	term	NOUN
qb98mc9033z	10	5	was	be	AUX
qb98mc9033z	10	6	imbedded	imbedded	ADJ
qb98mc9033z	10	7	into	into	ADP
qb98mc9033z	10	8	iterative	iterative	ADJ
qb98mc9033z	10	9	reconstruction	reconstruction	NOUN
qb98mc9033z	10	10	loop	loop	NOUN
qb98mc9033z	10	11	and	and	CCONJ
qb98mc9033z	10	12	we	we	PRON
qb98mc9033z	10	13	mainly	mainly	ADV
qb98mc9033z	10	14	focused	focus	VERB
qb98mc9033z	10	15	on	on	ADP
qb98mc9033z	10	16	the	the	DET
qb98mc9033z	10	17	problematic	problematic	ADJ
qb98mc9033z	10	18	bone	bone	NOUN
qb98mc9033z	10	19	component	component	NOUN
qb98mc9033z	10	20	,	,	PUNCT
qb98mc9033z	10	21	we	we	PRON
qb98mc9033z	10	22	named	name	VERB
qb98mc9033z	10	23	our	our	PRON
qb98mc9033z	10	24	method	method	NOUN
qb98mc9033z	10	25	as	as	ADP
qb98mc9033z	10	26	in	in	ADP
qb98mc9033z	10	27	loop	loop	NOUN
qb98mc9033z	10	28	iterative	iterative	ADJ
qb98mc9033z	10	29	bone	bone	NOUN
qb98mc9033z	10	30	operation	operation	NOUN
qb98mc9033z	10	31	(	(	PUNCT
qb98mc9033z	10	32	ilibo	ilibo	PROPN
qb98mc9033z	10	33	)	)	PUNCT
qb98mc9033z	10	34	.	.	PUNCT
qb98mc9033z	11	1	as	as	ADP
qb98mc9033z	11	2	comparison	comparison	NOUN
qb98mc9033z	11	3	,	,	PUNCT
qb98mc9033z	11	4	we	we	PRON
qb98mc9033z	11	5	also	also	ADV
qb98mc9033z	11	6	tested	test	VERB
qb98mc9033z	11	7	the	the	DET
qb98mc9033z	11	8	traditional	traditional	ADJ
qb98mc9033z	11	9	beam	beam	NOUN
qb98mc9033z	11	10	hardening	harden	VERB
qb98mc9033z	11	11	correction	correction	NOUN
qb98mc9033z	11	12	method	method	NOUN
qb98mc9033z	11	13	which	which	PRON
qb98mc9033z	11	14	was	be	AUX
qb98mc9033z	11	15	performed	perform	VERB
qb98mc9033z	11	16	directly	directly	ADV
qb98mc9033z	11	17	on	on	ADP
qb98mc9033z	11	18	the	the	DET
qb98mc9033z	11	19	projection	projection	NOUN
qb98mc9033z	11	20	data	datum	NOUN
qb98mc9033z	11	21	,	,	PUNCT
qb98mc9033z	11	22	and	and	CCONJ
qb98mc9033z	11	23	referred	refer	VERB
qb98mc9033z	11	24	it	it	PRON
qb98mc9033z	11	25	as	as	ADP
qb98mc9033z	11	26	out	out	ADP
qb98mc9033z	11	27	of	of	ADP
qb98mc9033z	11	28	loop	loop	NOUN
qb98mc9033z	11	29	iterative	iterative	ADJ
qb98mc9033z	11	30	bone	bone	NOUN
qb98mc9033z	11	31	operation	operation	NOUN
qb98mc9033z	11	32	(	(	PUNCT
qb98mc9033z	11	33	olibo	olibo	PROPN
qb98mc9033z	11	34	)	)	PUNCT
qb98mc9033z	11	35	.	.	PUNCT
qb98mc9033z	12	1	experiments	experiment	NOUN
qb98mc9033z	12	2	were	be	AUX
qb98mc9033z	12	3	performed	perform	VERB
qb98mc9033z	12	4	with	with	ADP
qb98mc9033z	12	5	both	both	DET
qb98mc9033z	12	6	simulated	simulate	VERB
qb98mc9033z	12	7	2	2	NUM
qb98mc9033z	12	8	-	-	PUNCT
qb98mc9033z	12	9	d	d	NOUN
qb98mc9033z	12	10	phantoms	phantom	NOUN
qb98mc9033z	12	11	and	and	CCONJ
qb98mc9033z	12	12	3	3	NUM
qb98mc9033z	12	13	-	-	PUNCT
qb98mc9033z	12	14	d	d	NOUN
qb98mc9033z	12	15	clinical	clinical	ADJ
qb98mc9033z	12	16	scans	scan	NOUN
qb98mc9033z	12	17	.	.	PUNCT
qb98mc9033z	13	1	the	the	DET
qb98mc9033z	13	2	table	table	NOUN
qb98mc9033z	13	3	correction	correction	NOUN
qb98mc9033z	13	4	method	method	NOUN
qb98mc9033z	13	5	has	have	VERB
qb98mc9033z	13	6	great	great	ADJ
qb98mc9033z	13	7	advantage	advantage	NOUN
qb98mc9033z	13	8	in	in	ADP
qb98mc9033z	13	9	saving	save	VERB
qb98mc9033z	13	10	computational	computational	ADJ
qb98mc9033z	13	11	cost	cost	NOUN
qb98mc9033z	13	12	compared	compare	VERB
qb98mc9033z	13	13	to	to	ADP
qb98mc9033z	13	14	the	the	DET
qb98mc9033z	13	15	polynomial	polynomial	ADJ
qb98mc9033z	13	16	correction	correction	NOUN
qb98mc9033z	13	17	in	in	ADP
qb98mc9033z	13	18	ilibo	ilibo	PROPN
qb98mc9033z	13	19	.	.	PUNCT
qb98mc9033z	14	1	the	the	DET
qb98mc9033z	14	2	reconstructed	reconstructed	ADJ
qb98mc9033z	14	3	images	image	NOUN
qb98mc9033z	14	4	present	present	VERB
qb98mc9033z	14	5	promising	promise	VERB
qb98mc9033z	14	6	improvement	improvement	NOUN
qb98mc9033z	14	7	with	with	ADP
qb98mc9033z	14	8	the	the	DET
qb98mc9033z	14	9	table	table	NOUN
qb98mc9033z	14	10	correction	correction	NOUN
qb98mc9033z	14	11	in	in	ADP
qb98mc9033z	14	12	ilibo	ilibo	PROPN
qb98mc9033z	14	13	:	:	PUNCT
qb98mc9033z	14	14	the	the	DET
qb98mc9033z	14	15	artifacts	artifact	NOUN
qb98mc9033z	14	16	from	from	ADP
qb98mc9033z	14	17	dense	dense	ADJ
qb98mc9033z	14	18	bone	bone	NOUN
qb98mc9033z	14	19	structure	structure	NOUN
qb98mc9033z	14	20	are	be	AUX
qb98mc9033z	14	21	better	well	ADV
qb98mc9033z	14	22	removed	remove	VERB
qb98mc9033z	14	23	;	;	PUNCT
qb98mc9033z	14	24	small	small	ADJ
qb98mc9033z	14	25	bone	bone	NOUN
qb98mc9033z	14	26	structures	structure	NOUN
qb98mc9033z	14	27	are	be	AUX
qb98mc9033z	14	28	better	well	ADV
qb98mc9033z	14	29	defined	define	VERB
qb98mc9033z	14	30	and	and	CCONJ
qb98mc9033z	14	31	the	the	DET
qb98mc9033z	14	32	edge	edge	NOUN
qb98mc9033z	14	33	of	of	ADP
qb98mc9033z	14	34	the	the	DET
qb98mc9033z	14	35	bone	bone	NOUN
qb98mc9033z	14	36	structures	structure	NOUN
qb98mc9033z	14	37	are	be	AUX
qb98mc9033z	14	38	more	more	ADV
qb98mc9033z	14	39	sharp	sharp	ADJ
qb98mc9033z	14	40	.	.	PUNCT
qb98mc9033z	15	1	based	base	VERB
qb98mc9033z	15	2	on	on	ADP
qb98mc9033z	15	3	these	these	DET
qb98mc9033z	15	4	experiments	experiment	NOUN
qb98mc9033z	15	5	,	,	PUNCT
qb98mc9033z	15	6	we	we	PRON
qb98mc9033z	15	7	consider	consider	VERB
qb98mc9033z	15	8	the	the	DET
qb98mc9033z	15	9	ilibo	ilibo	NOUN
qb98mc9033z	15	10	with	with	ADP
qb98mc9033z	15	11	table	table	NOUN
qb98mc9033z	15	12	correction	correction	NOUN
qb98mc9033z	15	13	as	as	ADP
qb98mc9033z	15	14	an	an	DET
qb98mc9033z	15	15	encouraging	encouraging	ADJ
qb98mc9033z	15	16	beam	beam	NOUN
qb98mc9033z	15	17	hardening	hardening	NOUN
qb98mc9033z	15	18	correction	correction	NOUN
qb98mc9033z	15	19	algorithm	algorithm	X
qb98mc9033z	15	20	in	in	ADP
qb98mc9033z	15	21	statistical	statistical	ADJ
qb98mc9033z	15	22	iterative	iterative	ADJ
qb98mc9033z	15	23	reconstruction	reconstruction	NOUN
qb98mc9033z	15	24	.	.	PUNCT