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ﺰﻐﻣﺖﮑﭙﺳﺍﻱﺭﺍﺩﺮﺑﺮﻳﻮﺼﺗﺭﺩﺮﺘﻠﻴﻓﺏﺎﺨﺘﻧﺍ
ﻲﺴﻴﺋر مﺎﻬﻟا
1
، ﺮﺘﻛد ﻲﺒﺟر ﻦﻴﺴﺣ
2
، يﺮﻴﻣﺎﻗآ ﺎﺿر دﻮﻤﺤﻣ ﺮﺘﻛد
3
ﺮﺘﻛد ، هداز ﻲﺟﺎﺣ ﻢﻴﻫاﺮﺑا
4
ﻲﻬﻠﻟا ﻒﻴﺳ ماﺮﻬﺷ ﺮﺘﻛد ،
5
، ﺮﺘﻛد
ﻲﺑﻮﻘﻌﻳ ﺪﻴﻫﺎﻧ
5
، يدﺎﺑآزوﺮﻴﻓ ﻦﺴﺣ ﺪﻴﺳ ﺮﺘﻛد
5
ﻲﺒﺟر نﺎﻓﺮﻄﻴﺑ ﺪﻤﺣا ،
1
1
،ﻲﻜﺷﺰﭘ ﻚﻳﺰﻴﻓ يﺮﺘﻛد يﻮﺠﺸﻧاد ﺖﻴﺑﺮﺗ هﺎﮕﺸﻧاد
سرﺪﻣ ،
2
،سرﺪﻣ ﺖﻴﺑﺮﺗ هﺎﮕﺸﻧاد ﻲﻜﺷﺰﭘ ﻚﻳﺰﻴﻓ هوﺮﮔ رﺎﻳدﺎﺘﺳا
3
،ﻲﺘﺸﻬﺑ ﺪﻴﻬﺷ هﺎﮕﺸﻧاد ﻲﻜﺷﺰﭘ ﻮﺗﺮﭘ هوﺮﮔ رﺎﻳدﺎﺘﺳا
4
سرﺪﻣ ﺖﻴﺑﺮﺗ هﺎﮕﺸﻧاد ﻲﺘﺴﻳز رﺎﻣآ هوﺮﮔ رﺎﻴﺸﻧاد ،
5
ﻲﺋﺎﺟر ﺪﻴﻬﺷ ﺐﻠﻗ نﺎﺘﺳرﺎﻤﻴﺑ يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘ ﺶﺨﺑ رﺎﻳدﺎﺘﺳا ناﺮﻬﺗ ،
)
ﺖﻓﺎﻳردﺦﻳرﺎﺗ
: 19 / 4 / 85
حﻼﺻاﺦﻳرﺎﺗ،
: 10 / 8 / 85
شﺮﻳﺬﭘﺦﻳرﺎﺗ،
: 11 / 9 / 85 (
هﺪﻴﻜﭼ
ﻪﻣﺪﻘﻣ :
ﺮﻳوﺎﺼﺗﺖﻴﻔﻴﻛيورﺮﺑﻪﻛﻲﻜﻴﻨﻜﺗوﻲﻨﻓﻞﻣاﻮﻋزاﻲﻜﻳ وﺖـﺳردﺮﮔاﻪﻛﺪﺷﺎﺑﻲﻣمﺎﺧﺮﻳوﺎﺼﺗنﻮﻴﺳاﺮﺘﻠﻴﻓدرادياﻪﻈﺣﻼﻣﻞﺑﺎﻗﺮﻴﺛﺄﺗﺖﻜﭙﺳا
ﺪﻫدﻲﻣﺶﻳاﺰﻓاياﻪﻈﺣﻼﻣﻞﺑﺎﻗرﻮﻄﺑارﺮﻳوﺎﺼﺗﻲﺼﻴﺨﺸﺗﺖﻗدﺪﻧﻮﺷبﺎﺨﺘﻧاﻖﻴﻗد .
ﻲﺳرﺮﺑشور
: ﺎﺼﺗﻪﻴﻠﻛ ﺮﻳو ﺮﺘﻠﻴﻓنوﺪﺑﺖﻟﺎﺣردﻦﺸﻜﺟوﺮﭘﻚﺑﺮﺘﻠﻴﻓيزﺎﺳزﺎﺑشورﺎﺑراﺰﻓامﺮﻧﻪﻠﻴﺳوﻪﺑ )
Ramp
( يﺎﻫﺮﺘﻠﻴﻓو
Cosine
،
Shepp-Logan
،
Hamming
،
Hanning
،
Butterworth
،
Metz
و
Wiener
ﺪـﻨﺘﻓﺮﮔراﺮﻗشزادﺮﭘدرﻮﻣ .
زاﻚـﻳﺮـﻫ ردﻚـﻴﻓاﺮﮔﻮﻣﻮﺗﺮﻳوﺎـﺼﺗ
6200
ﻊﺟﺮﻣﺮﻳﻮﺼﺗﺎﺑرﺎﺑﺮﻫويزﺎﺳﻪﻴﺒﺷﺖﻟﺎﺣ ﻊﻄﻘﻣنآﻪﺑطﻮﺑﺮﻣ
ﺮﻳﻮﺼﺗﺖﻴﻔﻴﻛﻲﻠﻛﺺﺧﺎﺷراﺪﻘﻣوﻪﺴﻳﺎﻘﻣ ﻮـﺼﺗﺎﺑﺖﻫﺎﺒﺷكﻼﻣناﻮﻨﻋﻪﺑ
ﻳ ﺮ ﻊـﺟﺮﻣ
ﺪﺷﻪﺒﺳﺎﺤﻣ .
رﻮـﻄﺑوﺮﻳﻮـﺼﺗندﻮـﺑفﺎﺻ،ﺖﺳاﺮﺘﻨﻛ،ﻚﻴﻜﻔﺗترﺪﻗﺮﻈﻧزاياﻪﺘﺴﻫﻲﻜﺷﺰﭘﻦﻴﺼﺼﺨﺘﻣﻂﺳﻮﺗهﺪﺷشزادﺮﭘﺮﻳوﺎﺼﺗﻲﻔﻴﻛشوررد
ﺖﻓﺮﮔراﺮﻗﻲﺳرﺮﺑوﻲﺑﺎﻳزرادرﻮﻣﺮﻳﻮﺼﺗﻦﻳﺮﺘﻬﺑﻲﻠﻛ .
ﻳ
ﺎﻫﻪﺘﻓﺎ
: ﺮﺘﻠﻴﻓبﺎﺨﺘﻧا ﺰﻐﻣيﺪﻌﺑﻪﺳ مﻮﺘﻧﺎﻓرد
ﺮﺑ سﺎﺳا ﺮﻳﻮﺼﺗﻦﻳﺮﺘﻬﺑوﺮﻳﻮﺼﺗ ندﻮﺑفﺎﺻ،ﺖﺳاﺮﺘﻨﻛ، ﻚﻴﻜﻔﺗترﺪﻗﺮﺘﻣارﺎﭘرﺎﻬﭼ هوﺮﮔ
يﺪﻨﺑ
ﺪﻧﺪﺷ . لوﺪﺟﺞﻳﺎﺘﻧسﺎﺳاﺮﺑ
Test-Statistics
دراددﻮﺟويرادﻲﻨﻌﻣفﻼﺘﺧاﺎﻫﺮﺘﻠﻴﻓﻪﺑطﻮﺑﺮﻣﺪﺻردﻦﻴﺑ، )
> p-value
05 / 0 .(
يﺮﻴﮔﻪﺠﻴﺘﻧ
: ﺠﻴﺘﻧ ﻛﻪ ﻲﻔﻴ ﻲﻣدﺎﻬﻨﺸﻴﭘﻪﻌﻟﺎﻄﻣﻦﻳا ﻪﻛﺪﻨﻛ
ﺮﺘﻠﻴﻓ
Wiener
و
Metz
ﻲﻣﺶﻳﺎﻤﻧارﺖﺳاﺮﺘﻨﻛوﻚﻴﻜﻔﺗترﺪﻗﺮﻈﻧزاﺮﻳﻮﺼﺗﺖﻴﻔﻴﻛﻦﻳﺮﺘﻬﺑ
ﺪﻨﻫد . ﺮﺘﻠﻴﻓﻪﻛﺪﻫدﻲﻣنﺎﺸﻧارﺐﻠﻄﻣﻦﻳاﻲﻔﻴﻛﺞﻳﺎﺘﻧﻦﻴﻨﭼﻢﻫ
Butterworth
ﺪﻨﻛﻲﻣدﺎﺠﻳاﻲﮔﺪﻨﻨﻛفﺎﺻﺮﻈﻧزاارﺮﻳﻮﺼﺗﺖﻴﻔﻴﻛﻦﻳﺮﺘﻬﺑ .
ﺮﻈﻧزا
ﺼﺗﻦﻳﺮﺘﻬﺑ ﺮﺘﻠﻴﻓﻖﻴﻘﺤﺗﻦﻳاﺞﻳﺎﺘﻧﺮﻳﻮ
Butterworth
ﺪﻨﻛﻲﻣﻲﻓﺮﻌﻣﺮﺘﻠﻴﻓﻦﻳﺮﺘﻬﺑناﻮﻨﻋﻪﺑار .
يﺪﻴﻠﻛيﺎﻫهژاو
: ﺮﻳﻮﺼﺗﺖﻴﻔﻴﻛﻲﻠﻛﺺﺧﺎﺷ،نﻮﻴﺳاﺮﺘﻠﻴﻓ،ﺖﻜﭙﺳا
هرود ،ناﺮﻳا يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘ ﻪﻠﺠﻣ 15
هرﺎﻤﺷ ، 27 لﺎﺳ ، 6 138 تﺎﺤﻔﺻ ، 8
-1
ﺴﻣهﺪﻨﺴﻳﻮﻧ
ﺌ لﻮ : ﺮﺘﻛد ﻲﺒﺟرﻦﻴﺴﺣ ،ناﺮﻬﺗ،
ﺪﻤﺣالآلﻼﺟهاﺮﮔرﺰﺑ ،
،ﻲﻜﺷﺰﭘﻚﻳﺰﻴﻓهوﺮﮔ،ﻲﻜﺷﺰﭘهﺪﻜﺸﻧاد،سرﺪﻣﺖﻴﺑﺮﺗهﺎﮕﺸﻧاد
Downloaded from
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on Monday, August 13, 2012
هرود ،ناﺮﻳا يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘ ﻪﻠﺠﻣ 15
هرﺎﻤﺷ ، 27 لﺎﺳ ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
ﻪﻣﺪﻘﻣ
ﻴﺘﻛاﻮﻳداريﺎﻫﻪﺘﺴﻫ ﻪﻟﺎﺤﺘﺳاﻲﻓدﺎﺼﺗ ﺖﻴﻫﺎﻣ ﻮ
ﻲﮔﺪﻨﻛاﺮﭘ ،
و
ﺢﻄﺳ ﻪﺑ نﻮﺗﻮﻓ درﻮﺧﺮﺑ ،ﻲﻧﻮﺗﻮﻓ نﺎﻳﺮﺟ ﻒﻴﻌﻀﺗ
،ﻦﻜﺳا تﺪﻣ لﻮﻃ ،ﺖﺳردﺎﻧ يزﺎﺳرﺎﻜﺷآ و رﻮﺗﺎﻤﻴﻟﻮﻛ
ود ناﺰﻴﻣ دﺎﺠﻳا ﺄﺸﻨﻣ زﺎﺳرﺎﻜﺷآ هزاﺪﻧا ،رﺎﻤﻴﺑ ﻪﺑ ﻲﻘﻳرﺰﺗ ز
ﺪﻨﺷﺎﺑ ﻲﻣ يا ﻪﺘﺴﻫﻲﻜﺷﺰﭘ ﺮﻳوﺎﺼﺗرد ﺰﻳﻮﻧ
.
ﺰﻳﻮﻧ ﻞﻜﺸﻣ
ﻲﻟﺎﺘﻴﺠﻳديﺎﻫﺮﺘﻠﻴﻓ دﺮﺑرﺎﻛ ﺎﺑ ٌﻻﻮﻤﻌﻣ يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘرد
دﻮﺷ ﻲﻣ ﻞﺣ رﺬﮔ ﻦﻴﻳﺎﭘ
) 2 -1 .( رﻮﻈﻨﻣ ﻪﺑ ﺎﻫﺮﺘﻠﻴﻓ ﻦﻳا
ﻻﺎﺑﺲﻧﺎﻛﺮﻓ فﺬﺣ
) ﺰﻳﻮﻧﺎﻳ دراﺪﻧدﻮﺟولﺎﻨﮕﻴﺳ ﻪﻛﻲﻳﺎﺟ
هدﻮﺑ ﺐﻟﺎﻏ
(
ﺪﻧا هﺪﺷ ﻲﺣاﺮﻃ
.
و تﺎﻌﻟﺎﻄﻣ ياﺮﺑ
ﻤﺘﺴﻴﺳ ﺎﻬ
ﻲﺣاﺮﻃ يدﺪﻌﺘﻣ ﻲﻟﺎﺘﻴﺠﻳد يﺎﻫﺮﺘﻠﻴﻓ ﻒﻠﺘﺨﻣ ي
ﺖﺳا هﺪﺷ
. ﺐﺳﺎﻨﻣ ﺮﺘﻠﻴﻓ بﺎﺨﺘﻧا ياﺮﺑ ﻲﺗوﺎﻔﺘﻣ يﺎﻫرﺎﻴﻌﻣ
دراددﻮﺟو
. ترﺪﻗ،ﺖﺳاﺮﺘﻨﻛدﻮﺒﻬﺑناﻮﺗﻲﻣﺎﻬﻧآﻪﻠﻤﺟزا
و فﺎﺻ ﺮﻈﻧ زا ،ﺰﻳﻮﻧ ﻪﺑ لﺎﻨﮕﻴﺳ ﺖﺒﺴﻧ ﺶﻳاﺰﻓا ،ﻚﻴﻜﻔﺗ
ﺮﻳﻮﺼﺗ ندﻮﺑ مﺮﻧ
) Smoothing (
مﺎﻧ دﺮﺑ ) 3 .( عﻮﻨﺗ
ﺮﺘﻠﻴﻓ
ﺮﻳوﺎﺼﺗ ﺖﻴﻔﻴﻛ رد هدﺮﺘﺴﮔ توﺎﻔﺗ و دﻮﺟﻮﻣ يﺎﻫ
ﻢﻴﻈﻨﺗ و بﺎﺨﺘﻧا ياﺮﺑ ار يا هﺪﻴﭽﻴﭘ ﻂﻳاﺮﺷ
دﺎﺠﻳا ﺮﺘﻠﻴﻓ
ﻲﻣ ﺪﻨﻛ ) 5 -4 .(
رﺎﻜﺷآ ﻪﻛ هداد نﺎﺸﻧ تﺎﻌﻟﺎﻄﻣ يداﺪﻌﺗ
صﻮﺼﺧ ﻪﺑ و ﺮﺘﻠﻴﻓ عﻮﻧ بﺎﺨﺘﻧا ﺎﺑ تﺎﻌﻳﺎﺿ ندﺮﻛ
راﺮﻗ ﺮﻴﺛﺄﺗ ﺖﺤﺗ يﺪﺟ رﻮﻃ ﻪﺑ ﺮﺘﻠﻴﻓ ﻊﻄﻗ ﺲﻧﺎﻛﺮﻓ
ﻲﻣ ﺪﻧﺮﻴﮔ ) 6 ( . وﺮﻨﻳا زا
ﻮﺳ ﻚﻳزا ﺮﺘﻠﻴﻓ ﺐﺳﺎﻨﻣﺎﻧبﺎﺨﺘﻧا
ﺎﻳ وﻚﭼﻮﻛ تﺎﻌﻳﺎﺿفﺬﺣ ﺎﺑﺪﻧاﻮﺗ ﻲﻣ
ﺖﺳاﺮﺘﻨﻛﺶﻫﺎﻛ
ﻲﻌﻗاو ﺮﻴﻏ ﺶﻳاﺰﻓا ﺎﻳ و يرﺎﻤﻴﺑ ﺺﻴﺨﺸﺗ مﺪﻋ ﺐﺟﻮﻣ
ﺖﻜﻔﻴﺗرآ دﺎﺠﻳا و ﺖﺳاﺮﺘﻨﻛ
ﺖﺳردﺎﻧ ﺺﻴﺨﺸﺗ ﺐﺟﻮﻣ
ددﺮﮔ .
رد هﺪﻨﻛاﺮﭘ يﺎﻫ ﻮﺗﺮﭘ يﻻﺎﺑ ناﺰﻴﻣ ﻪﺑ ﻪﺟﻮﺗ ﺎﺑ
ﻪﻤﺠﻤﺟ ناﻮﺨﺘﺳا
ﺮﺑ ﺮﻳﻮﺼﺗ رد ﻞﻜﺸﻣ ﻦﻳا
ﺰﻐﻣ زا يراد
ﺖﺳا ﺮﺗ هﺪﻴﭽﻴﭘ و ﺮﺗزرﺎﺑ
) 2 .(
ﻞﻳﻻد ﻦﻳﺮﺗ هﺪﻤﻋ زا ﻲﻜﻳ
دراﺪﻧﺎﺘﺳا شور دﻮﺟو مﺪﻋ ﺖﻴﻘﻓﻮﻣ مﺪﻋ ﻦﻳا
ياﺮﺑ
ﺖﺳاﺰﻐﻣ ﺮﻳوﺎﺼﺗ شزادﺮﭘ
.
رد ﻲﻧاواﺮﻓتﺎﻌﻟﺎﻄﻣ ﺪﻨﭼ ﺮﻫ
يرادﺮﺑﺮﻳﻮﺼﺗ ﻪﻨﻴﻣز ﺖﻜﭙﺳا
ﺖﺳاهﺪﺷ مﺎﺠﻧا
) 12 -7 ( ﺎﻣا
ﺐﻠﻗ ﻚﻴﻓاﺮﮔﻮﻣﻮﺗ ﺮﻳوﺎﺼﺗ نﻮﻣاﺮﻴﭘ ﺎﺗﺪﻤﻋ تﺎﻌﻟﺎﻄﻣ ﻦﻳا
ﻛﺮﻤﺘﻣ ﺰ
تﺎﻌﻟﺎﻄﻣ ندﺮﻛ دراﺪﻧﺎﺘﺳا ﻪﺑ ﺮﺘﻤﻛ و ﺪﻧا هدﻮﺑ
ﺖﺳاهﺪﺷﻪﺟﻮﺗﺰﻐﻣﻪﺑطﻮﺑﺮﻣ
. ﻦﻴﻴﻌﺗﻪﻌﻟﺎﻄﻣﻦﻳازافﺪﻫ
ﺮﻳوﺎﺼﺗ يزﺎﺳ ﻪﻴﺒﺷ ياﺮﺑ ﻪﻨﻴﻬﺑ ﻂﻳاﺮﺷ
ﺰﻐﻣ ﻚﻴﻓاﺮﮔﻮﻣﻮﺗ
دﻮﺑ .
ﻲﺳرﺮﺑ شور
يرادﺮﺑﺮﻳﻮﺼﺗﻞﻜﺗوﺮﭘ
:
ﺎﺑ ﺰﻐﻣمﻮﺘﻧﺎﻓزا 4
ﺪـﺷهدﺎﻔﺘـﺳاﻪﻳﻻ .
ﺎـﺑيرادﺮـﺑ ﺮﻳﻮـﺼﺗ
ﻣﺎﮔﻦﻴﺑرودزاهدﺎﻔﺘﺳا ﺎ
د ﺮﺳو Mediso لﺪﻣ
(Nucline
TM) رد
رﻮﺗﺎـﻤﻴﻠﻛﻪـﺑﺰﻬﺠﻣﺖﻟﺎﺣود ﺎـﺑﻦﻴﻳﺎـﭘيژﺮـﻧا
ﻻﺎﺑ ﻦﺷﻮﻟوزر
ﺖﻓﺮﻳﺬﭘمﺎﺠﻧا
.
ﻞـﺻاﻮﻓردﺖـﺨﺗﺮﻳوﺎـﺼﺗ
ﺮﻔــــﺻ و 10 هزاﺪــــﻧاورﻮﺗﺎــــﻤﻴﻠﻛزايﺮﺘﻤﻴﺘﻧﺎــــﺳ
ﺲﻳﺮﺗﺎــﻣ 128
× 128 ﺖــﻓﺮﮔمﺎــﺠﻧا .
يرادﺮــﺑﺮﻳﻮــﺼﺗ
ويﺪـﻌﺑﻪـﺳﺖـﻟﺎﺣردمﻮﺘﻧﺎـﻓندادراﺮﻗﺎﺑ ﻚﻴﻓاﺮﮔﻮﻣﻮﺗ
يزاﻮﻣ
ﻦﻴﺑرودﺶﺧﺮﭼرﻮﺤﻣﺎﺑ
) circular (
رد عﺎﻌﺷ 20
يروآﻊـﻤﺟﺎﺑﺮﺘﻤﻴﺘﻧﺎﺳ 180
ﺶﺧﺮـﭼﻪـﻳوازردﺮﻳﻮـﺼﺗ
360
ردوﻪﺟرد
ﺲﻳﺮﺗﺎـﻣ 128
× 128
ﺖـﻓﺮﮔمﺎـﺠﻧا
. ﻦـﻳا
ﺮﻫردشرﺎﻤﺷوهﺪﺷﺮﻛذرﻮﺗﺎﻤﻴﻠﻛودﺎﺑيرادﺮﺑﺮﻳﻮﺼﺗ
ﻦــﺸﻜﺟوﺮﭘ 40000
و 120000 و
200000 ﺖــﻓﺮﮔ مﺎــﺠﻧا .
ﺮﻣمﺎﻤﺗﻲﻓدﺎﺼﺗيﺎﻫﺎﻄﺧﺶﻫﺎﻛﺖﻬﺟ
ردقﻮـﻓﻞـﺣا 5
رﺎﺑ ﺪﻳدﺮﮔراﺮﻜﺗ .
ﺖـﻣﺮﻓﻪـﺑهﺪـﻣآﺖـﺳﺪﺑﺮﻳوﺎـﺼﺗﻪـﻴﻠﻛ
ﻞﻳﺎﻓﺮﺘﻨﻳا
ﻲﺼﺨﺷﺮﺗﻮﻴﭙﻣﺎﻛﻪﺑوﻞﻳﺪﺒﺗ
ﺪﻳدﺮﮔﻞﻘﺘﻨﻣ .
شزادﺮﭘ
:
ﺎﻫدادياهدﻮﺗشزادﺮﭘﺖﻬﺟ
يراﺰـﻓامﺮـﻧﻪﺘـﺴﺑﻚﻳ رد
ﻂﻴﺤﻣ matlab 7 رﺎﺒﺘﻋانﻮﻣزآﺮﻳوﺎﺼﺗﻪﻠﻴﺳﻮﺑوﻲﺣاﺮﻃ
ﺪﻳدﺮﮔﻲﺠﻨﺳ
.
زاﻚﻳﺮﻫ
ردﻚـﻴﻓاﺮﮔﻮﻣﻮﺗﺮﻳوﺎـﺼﺗ 6200
يزﺎـــﺳﻪﻴﺒـــﺷﺖـــﻟﺎﺣ )
يﺎـــﻫﺮﺘﻠﻴﻓ Cosine
،
Shepp-Logan ، Hamming ،
Hanning ردﻚــــﻳﺮــــﻫ
50
ﺮــﺘﻠﻴﻓ،ﺖــﻟﺎﺣ Butterworth
ﺮــﺘﻠﻴﻓ،ﺖــﻟﺎﺣراﺰــﻫود
Metz ﺮﺘﻠﻴﻓ،ﺖﻟﺎﺣراﺰﻫود Wiener
ﺖـﻟﺎﺣراﺰﻫود
( و
ﻊﻄﻘﻣنآﻪﺑطﻮﺑﺮﻣﻊﺟﺮﻣﺮﻳﻮﺼﺗﺎﺑرﺎﺑﺮﻫ راﺪﻘﻣوﻪﺴﻳﺎﻘﻣ
ﺮﻳﻮﺼﺗﺖﻴﻔﻴﻛﻲﻠﻛﺺﺧﺎﺷ
كﻼـﻣناﻮﻨﻋﻪﺑ
ﺎـﺑﺖﻫﺎﺒـﺷ
ﻮﺼﺗ ﻳ ﺮ ﻊﺟﺮﻣ راﺰﻓامﺮﻧﻂﺳﻮﺗ
ﺪـﺷﻪﺒﺳﺎﺤﻣ
) 13 .( ﺮـﻫرد
يﺎــﻫﺮﺘﻠﻴﻓ،راﺰــﻓامﺮــﻧﻂــﺳﻮﺗندﺮــﻛاﺮــﺟارﺎــﺑ Cosine
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هرود ،ناﺮﻳا يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘ ﻪﻠﺠﻣ 15 هرﺎﻤﺷ ، 27 لﺎﺳ ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
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هرود ،ناﺮﻳا يا ﻪﺘﺴﻫ ﻲﻜﺷﺰﭘ ﻪﻠﺠﻣ 15
هرﺎﻤﺷ ، 27 لﺎﺳ ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
1.8
17.8
3.3 2.8 2.8
12.5
27.1
31.8
0 5 10 15 20 25 30 35
ra
mp
sh
e
pp-l
o
g
a
n
co
si
n
e
h
a
mmi
n
g
ha
n
n
in
g
b
u
tte
r
w
o
r
th
me
tz
w
ien
er
Filters
1.3
11.6
2.8 2.1 1.6
8.5
36.5 35.5
0 5 10 15 20 25 30 35 40
ra
m
p
sh
ep
p
-l
o
gan
co
si
n
e
ha
m
m
in
g
ha
nn
in
g
b
u
tt
er
w
o
rth
me
tz
w
ien
er
Filters
ﻞﻜﺷ 1 -ﻚﻴﻜﻔﺗترﺪﻗﻪﺑطﻮﺑﺮﻣيﺎﻫﺮﺘﻣارﺎﭘ
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هرود،ناﺮﻳاياﻪﺘﺴﻫﻲﻜﺷﺰﭘﻪﻠﺠﻣ 15 هرﺎﻤﺷ، 27 لﺎﺳ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
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هرود،ناﺮﻳاياﻪﺘﺴﻫﻲﻜﺷﺰﭘﻪﻠﺠﻣ 15
هرﺎﻤﺷ، 27 لﺎﺳ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
16.2
7.8
14.8 16.6
28.8
9.7
6.1
0 5 10 15 20 25 30 35
shepp-logan
cosnie
hamming hanning
b
u
tterworth
metz
wiener
Filters
0.7
18.5
5.5 4.8
3.7
32.4
16.6 17.8
0 5 10 15 20 25 30 35
ra
m
p
sh
epp-lo
g
a
n
co
si
n
e
ha
m
m
in
g
ha
nn
in
g
but
te
rw
o
rt
h
me
tz
wi
en
er
Filters
ﻞﻜﺷ 3 -ﺮﻳﻮﺼﺗندﻮﺑفﺎﺻﻪﺑطﻮﺑﺮﻣيﺎﻫﺮﺘﻣارﺎﭘ
ﻞﻜﺷ 4 -طﻮﺑﺮﻣيﺎﻫﺮﺘﻣارﺎﭘ ﻪﺑ
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هرود،ناﺮﻳاياﻪﺘﺴﻫﻲﻜﺷﺰﭘﻪﻠﺠﻣ 15
هرﺎﻤﺷ، 27 لﺎﺳ، 1386 Iran J Nucl Med 2007; Vol 15, No 27
Wiener ﻢﻤﻳﺰﻛﺎﻣ ﻪﻤﻴﻧ رد ﺎﻨﻬﭘ ،
) 9 / 1 ﺎﺗ 1 / 2 ( و ﺐﻴﺷ ) 6
ﺎﺗ 12 ( ﺮﺘﻠﻴﻓ ياﺮﺑ Metz
ﻊﻄﻗ ﺲﻧﺎﻛﺮﻓ و )
1 / 0 ﺎـﺗ 5 / 0 ( و
ﺐﻴﺷ ) 1 ﺎﺗ 5 ( اﺮﺑ ﺮـﺘﻠﻴﻓ ي Butterworth
يﺎـﻫ ﺮﺘﻣارﺎـﭘ
ﺪﺷﺎﺑ ﻲﻣ ﻖﻴﻘﺤﺗ ﻦﻳا زا ﻞﺻﺎﺣ ﻪﻨﻴﻬﺑ .
ﻪـﺘﻜﻧ ﺎﺟ ﻦﻳا رد ﻪﺘﺒﻟا
عﻮﻧ ،ﻲﺳرﺮﺑ درﻮﻣ ﻪﻘﻄﻨﻣ ﻪﺑ ﻪﺟﻮﺗ ﺎﺑ دراد دﻮﺟو ﻲﺜﺤﺑ ﻞﺑﺎﻗ ،ﺪـﺷﺎﺑ ﻲـﻣ توﺎـﻔﺘﻣ نآ ﺮﺘﻣارﺎـﭘ و ﺮـﺘﻠﻴﻓ بﺎﺨﺘﻧا ،ﻪﺿرﺎﻋ يرﺎـﻤﻴﺑ عﻮـﻧ ﻪـﺑ و دراﺪـﻧ نﺎـﻜﻣا ﻪﻨﻴﻬﺑ ﺮﺘﻠﻴﻓ ﻚﻳ ﻦﻳاﺮﺑﺎﻨﺑ
ﻛ ﻦﻳا دراد ﻲﮕﺘﺴﺑ ﺖﻓﺎﺑ ﺎﻳ هﺪﺷ ﻪﺿرﺎﻋ رﺎﭼد ﺪﻴﻔﺳ ﺖﻓﺎﺑ ﻪ
ﺪﺷﺎﺑ ﻲﻣ ﺮﻴﻴﻐﺘﻣ ﺮﺘﻠﻴﻓ بﺎﺨﺘﻧا ﺖﺳا هﺪﺷ ﺮﻴﮔرد يﺮﺘﺴﻛﺎﺧ .
يﺎﻫﺮﺘﻠﻴﻓ ،ﺪﺷﺎﺑ ﻪﺘﺷاد دﻮﺟو يا ﻪﺿرﺎﻋ ﺪﻴﻔﺳ ﺖﻓﺎﺑ ردﺮﮔا دﻮـﺷ ﻲﻣ هداد ﺢﻴﺟﺮﺗ هﺪﻨﻨﻛ ﺖﻳﻮﻘﺗ )
Wiener و
Metz (
دﻮـﺟو يﺮﺘـﺴﻛﺎﺧ ﺖـﻓﺎﺑ رد يا ﻪـﺿرﺎﻋ ﺮـﮔا ﺲﻜﻋ ﺮﺑ و هﺪﻨﻨﻛ فﺎﺻ يﺎﻫﺮﺘﻠﻴﻓ ﺪﺷﺎﺑ ﻪﺘﺷاد )
Butterworth (
ﺮـﺘﻬﺑ
و ﺪﻨﻨﻛ ﻲﻣ ﻞﻤﻋ ﻚﻳ ﺺﻴﺨﺸﺗ ياﺮﺑ دراﻮﻣ ﻲﻀﻌﺑ رد ﻲﺘﺣ
هﺪﻨﻨﻛ فﺎﺻ ﺮﺘﻠﻴﻓ عﻮﻧ ود ﺮﻫ ﺎﺑ ﺮﻳوﺎﺼﺗ ﺖﺳا مزﻻ يرﺎﻤﻴﺑ ﺎـﻫﺮﺘﻠﻴﻓ زا ماﺪـﻛ ﺮـﻫ اﺮـﻳز ﺪﻧﻮﺷ شزادﺮﭘ هﺪﻨﻨﻛ ﺖﻳﻮﻘﺗ و
و ﺮﻴـﺴﻔﺗ ﻪـﺑ ﻪـﻛ ﺪـﻨﻫد ﻲـﻣ ﺶﻳﺎـﻤﻧ ار ﻲﺻﺎﺧ تﺎﻋﻼﻃا ﺪﻨﻛ ﻲﻣ ﻲﻧﺎﻳﺎﺷ ﻚﻤﻛ ﺺﻴﺨﺸﺗ .
ﻲﻧادرﺪﻗوﺮﻜﺸﺗ
زا ﻲﺘـﺴﻬﻣ ﺮـﺘﻛد ﻢﻧﺎـﺧ و ﻚـﻠﻣ يدﺎـﻫ ﺮﺘﻛد يﺎﻗآ بﺎﻨﺟ
ﻮﻤﻋ ﻳ ﻪﻧﺎﻤﻴﻤـﺻ ،ﺪﻧدﻮﻤﻧ يرﺎﻳ ار ﺎﻣ ﺮﻳوﺎﺼﺗ ﺮﻴﺴﻔﺗ رد ﻪﻛ ﻲ
ﻲﻣ يراﺬﮕﺳﺎﭙﺳ ددﺮﮔ
.
ﻊﺑﺎﻨﻣ
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2. King MA, Coleman M, Penney BC, Glick SJ. Activity quantification in SPECT: A study of prereconstruction Metz filtering and use of the scatter degradation factor. Med Phys. 1991; 18(2): 184-189.
3. King MA, Long DT and Brill BA. SPECT volume quantitation: influence of spatial resolution, source size and shape and voxel size. Med Phys.1991; 18(5): 1016-1023. 4. Knoll P, Mirzaei S, Mullner A, Leitha T,
Koriska K, Kohn H, Neumann M. An Artificial neural net and error back propagation to reconstruct single photon emission computerized tomography data. Med Phys. 1999; 26: 244-248.
5. Suzuki S. Spatially limited filters for the two-dimensional convolution method of reconstruction, and their application to SPECT. Phys Med Biol. 1992; 37: 37-52. 6. Pandey A.K, Pant G.S and Malhotra A.
Standarization of SPECT filter parameters. Ind J Nucl Med. 2004;19(2): 30-35.
7. Sankaran S, Frey EC, Gilland KL, Tsui BM. Optimum compensation method and filter cutoff frequency in myocardial SPECT: A human observer study. J Nucl Med. 2002; 43(3): 432-438.
8. Hutton BF, Lau YH.. Application of distance-dependent resolution compensation
and post-reconstruction filtering for myocardial SPECT. Phys Med Biol. 1998; 43: 1679-1693.
9. Manrique A, Hitzel A, Vera P. Impact of
photon energy recovery on the assessment of left ventricular volume using myocardial perfusion SPECT. J Nucl Cardiol. 2004;11(3): 312-317.
10. Manrique A, Hitzel A, Gardin I, Dacher JN,
Vera P. Impact of wiener filter in determining the left ventricular volume and ejection fraction using thallium-201 gated SPECT. Nucl Med Commun. 2003; 24(8): 907-914.
11. Fakhri GE, Buvat I, Benali H, Paola RD.. Relative impact of scatter, collimator response, attenuation, and finite spatial resolution corrections in cardiac SPECT. J Nucl Med . 2000; 41: 1400-1408.
12. Hambye AS, Vervaet A, Dobbeleir A.
Variability of left ventricular ejection fraction and volumes with quantitative gated SPECT: Influence of algorithm, pixel size and reconstruction Parameters in small and normal-sized hearts. Eur J Nucl Med Mol Imaging. 2004; 31(12): 1606-1613.
13. Wang Z, Bovik AC A Universal Image Quality Index. IEEE Signal Processing Letters, 2002; Vol.XX, No.Y:1-4.
14. Taylor D. Filter choice for reconstructs tomography. Nucl Med Commun. 1994; 15:
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