TAP (Eli KHOA HOC & CONG NCIIE C.ir TRtONG BAI IKjC KV THI \T t SOTO-20H
GIAI PHAP HO TRO CHAN DOAN H I N H ANH TlT XA DllA THEO CHUAN DICOM TRONG Y TE
A N I M A G E DIAGNOSTIC SUPPORT SOLUTION BASED ON DICOM STANDARD IN TELEMEDICINE
Vu Duy Hdi Trirdng Dai hoe Bach klioa Hd Noi D j n Toa soan 16-9-2013. chSp nhan dang 25-12-2013
T O M T A T
Trong bai bao nay, tac gia da de xuat va xay dirng mot giai ptiap lid tro chin doan hinh anh t&
xa dira theo chudn DICOM trong ytenham giam thoi gian cung nhu chi phi cho benh nhan, dong thoi tang chat luvng dir lieu hinh anh giri di, nang cao liha nang ho tro chin doan cua benh vien tuyen tren cho benh vien tuyen diroi. Ket qua thir nghiem cho tiiiy, trung binh sau khoang tli&i gian 22 phut, bac sy tuyen tren da co thi nhan durrc day du dir lieu hinh anh chan doan cua benh nhan v&i chat twang dat tren 99% so v&i dir lieu goc. Ben canh do, viec xay dung cac tinh nang ve xir ly anh theo chuan DtCOM, Chen kit qua chin doan vao dtr lieu DICOtu! trong giai phap se giiip cho bac sy tuyen tren di dang hon trong phan tich. chin doan va giri kit qua lai cho bac sy tuyen dir&i tham khao.
lir khoa' Chan doan hinh anh Mr xa, chuan DICOM, may chu DICOM, D,comObjects, MRl ABSTRACT
In this paper, the author have proposed and built an image diagnostic support solution based on DICOM standard in tetemedicine to reduce time and costs lor patients, at the same time, it increases the quality ol the sending image data, enhance diagnostic support capabilities of the big hospitals to small hospitals. Test results showed that, after about 22 minutes only, the doctors were able to get all diagnosed image data of patient with the quality of over 99% compared to the original images In addition, building the features of the DtCOM standard image processing, inserted diagnosis result into the DICOM data of the solution wilt help the good doctors more easily on the analysis, diagnosis and send the suppoit results back to the doctors iv/jo need reference
Keywords; Telemedicine, DICOM, DICOM Server, DicomObjects, MRl
I. G I O I T H I E U CO so y te tuyen diroi co th^ nho h6 tro tir cac Cong nghe chin do,in hinh anh hien dai ' ' f " ' ' ,^'^" '"!"^" ^''" "*}"• < ' ' Chuyen benh trong y tJ ngay nay da dem lai nhiSu loi ich cho '*"" .'•=", ''«"'i . ^ ' « " '"5"^" ""=" ( P h i ' ^ B phSp ca nguoi benh va bac sy. Thong qua cac t h i a bi " " ^ ">" '"="' " ' * * ' S'a". kinh phi cilng nhir tao anh, bac sJ da co th^ chan doan va d i j u tri "^uy l„em cho benh nhan); (2) Gpi dien. quel diroc nhilu loai benh nan y nhir cac benh v'c " ' ™ ""'^ " ^ "^^>P " ! " b?"'! "han ro, gir, qua xuong khop, tim mach, so nSo.... Cic th,4t bi f " " ' * ° ^'^ "5" '">"=" " = " « '**> M tro chan chin doan hinh anh nay h k hk cung da duoc ' ' ° ' ' " <™'. P ' " " ' " 8 V^P " * > • <^'> " ? " ^"* ^nh dau tu nhiSu cho cac benh vien tuyen duoi, 81" d, chat luong thap, khong du Ihong tin va tham chi la ca cac co so y ti tu nhjn. Tuy "-'""P "'' P"""" ''"'"• ^." '^ ' ' ' ' lieu de cac bac sy nhien, mot thuc trang chung trong ngimh y t5 ' " y ™ '•"=" ™ "?= ^° '"! "^bin ^oi" <°' "hat), hien nay la doi ngu bac sy co trinh do chuyen ^ . " " 8 kin do, hat, het cac thiet bi tao anh duoc mon cao v l ITnh virc chjn doan hinh anh lai ' ' ' " ' " ^'^" " ^ ^ '^'" '^ hlif'nB tliiel bi chan doan chua du, tap trung chu y l u lai cac benh vien Ion '"."'^ " " ' ' ™"8 "^he cao (nhir may CT, M R l . a tuyin tren. V i t h i , nhu c i u cac bac sy o benh ^""' "" ^°- '^^•••l- "if* I'?" li'nh anh <Jau ra da vien tuyin dudi c i n h6 trr? tir cac bac sJ a benh " l " ^ " '^'^"^" D I C O M trong y te. Den c?nh do, vien l u y i n tren trong qua Irlnh chSn doan va ™'^ ™ ^^ ? ' * ^ien tai ciing da co iihieu may dieu tri la r l t Icrn. Hien tai, mot s6 phirong phap " " ' ' • '"^ ' ^ " " B mang L A N va ket noi Interne!
dang duoc sir dung d l cac benh vien hoac cac ' ' I ' P ^ ' ^ ' "S^- '^° * c tms dung cong nghe
T.Sl'riir KHOA HOC & CONG \G[[E CAC TRI 6\(; DAI HgCKVTHl'AT * SO 98-2014 thong tin vk truyen thong ciing vai co so vat
chat hien c6 t^i cac co so y te de trien khai mgt giai phap h6 trcr chin doan hinh anh tir xa dtra theo chu^n DICOM trong y tfi nbSm giam tbcn gian cijng nhu chi phi cho benh nhan, d6ng thoi tang chat krong dfl lieu hinh anh giri di, nang cao kha nang ho trg chan doan cua benh vien tuyen tren cho benh vien tuyen dudi.
2. BE XUAT XAY DUNG GIAI PHAP Mo hinh giai phap ho tro chan doan hinh anh tir xa dua tlieo chuan DICOM trong y t6 dirge mo ta nhu tren hinh 1.
Hinh /. Ml) hinh giai phdp ho tr(r chdn doan hinh dnh tie xa theo chudn DICOM
Trong giai phap nay, mo hinh dh xuSt gom 3 bg phan chinh g6m: (I) May chu va he quan trj ca so dCi' lieu (CSDL) DICOM, thirc hien luu trii du lieu hinh anh theo DICOM, quan ly va cung cap cac chirc nang nhan va luu trir dO: lieu anh, truy xuat de ISy dir lieu anh tir Server; (2) Tram gui yeu cau ho trg chan doan va phan mem giri dir lieu anli Ien DICOM Server, thuc hien ket noi vai vdi cac tiiiet bi tao anh, lay dir li6u anh DICOM va gui Ien DICOM Server de luu trCl'; (3) Tram nhfln ygu cku h§ trg chan doan va phan mem \u ly anh theo chuan DICOM. thirc hien truy xu^t vao DICOM Server de lay diJ lieu, cung cap cac chirc nang ho trg phan tich, xir ly diJ lieu anh va giri ket qua chan doan lai cho tram yeu cau li6 trg.
Giai phap dugc thuc hien theo quy trinh sau. Trong trirang hgp can ho trg chan doan tir cac benh vien tuyen tren. sau khi benh nhan thirc hien chieu chup tren thiet bj tao anh, benh vien tuyen dual se tbirc hien giri toan bp du* lieu anh cua benh nhan Ien DICOM Server vol vai tro la Tram giri yeu cau ho trg chan doan.
DICOM Server sg thuc hien nhan va hru trii' lai toan bp da lieu anh nay vao CSDL. Tai tram
nhan yeu cau ho trg chan doan, cac bac sJ se truy xuat vao trong CSDL ciia DICOM Server de lay lai toan bg dfl lieu anh cua benh nhan.
Thong qua phan mem xir ly anh DICOM. cac bac sy se phan ti'ch va chen ket qua chan doan vao dir lieu DICOM, dong thai giri thong bao cho benh vien tuyen duoi truy cap vao CSDL de tham khao ket qua phan tich.
Nhu vay vdi quy trinh cua giai phap d^
xudt. du lieu anh chan doan theo chuan DICOM cua benh nhan da dirpc girl tir tuyin dudi Ien tuyen tren, sau do ket qua hd trp chan doan se duoc giii lai cho benh vien tuyen dirdi tham khao chi thong qua dirdng truyen Internet ma khong phai chuyen trirc ti^p benh nhan di, khong phai chup lai cac xet nghiem da lam o tuyen dudi, tir dd cd the giam thdi gian ciing nhu kinh phi cho ngudi benh.
2.1. Xay dirng CSDL D I C O M Server Giao thiic luu file dnh DICOM.
Viec liru tru file DICOM cSn thuc hien la ghi file nhan dugc vao 6 luu trQ-, ddng thai doc thong tin file va ghi vao co sd dir lieu de phuc vu cho viec tim kiem va ISy lai file. Quy trinh xir ly va ghi file DICOM dugc thuc hien theo cac budc sau [3]:
(1 )Tao mpt dirdng dan du kien se ghi file anh vao. O day ten file anh dugc \iy bang thanh phSn dfl lieu cd nhan (0008, 0018).
Dudng dan nay phai tuan theo each thirc tao chi muc trong cau true file DICOM.
(2) Bdc tach cac thdng tin trong timg file anh roi day thdng tin cimg dudng d§n ghi anh vao CO sd du lieu DICOM dl phuc vu cho viec tim kiem va lay lai anh khi can.
(3)Su dung djch vu M-WRITE trong chuan DICOM, tao cac file mai trong mpt bg file va gan cho chung mpt chi s6 file hoSc cap nhat cac file neu trong bp file da l6n tai.
Viec tao bp file va chi sd file tuan thii theo chudn DICOM [3].
Hinh 2 dudi day md ta so dd hru trfl anh DICOM vao CSDL may chii:
Hinh 2 So do hni dnh DICOM vdo 6 dia
T,\P CHI KEIOA HOC &CO.\G NGHE CAC FRIONG DAI HQC KY THU^T « S O 9 8 - 2 0 H iS'u- dung DicomObjects de lini dnh •
Sau khi DICOM Server da nhan dugc anh, de lull anh c§n tao chi muc cho viec luu du' lieu anh theo dung quy djnh trong chuan DICOM c6 dang sau [3]:
SUBDIR \SUBDIR2 \SUBDIR3 \ABCDEFGH Vdi ABCDEFGH la ten file anh dugc lAy bang thanh phan dir lieu cd nhan (0008,0018). Sau dd can dpc cac thanh phan dO" lieu khac de luu vao CO sd d& lieu de phuc vu cho viec tim kiim thong tin anh sau nay ho^ic lay lai anh. Tren hinh 3 dudi day la k^t qua xay dung CSDL di luu trir file DICOM tren SQL. Cudi ciing sir dung djch vu M-WRITE do DicomObjects hd trg thuc hien ghi anh v^o CSDL theo dudng dan da dugc tao trudc. Dudi day la lenh goi djch vu M-WRITE;
ImageReceived Whte(filename.
"I.2.840.1000H.1.2. I") Trong dd: n filename » la chi muc da tao ra,
"} 2 84010008.1.2.1" la cii phap chuyen ddi (Transfer Syntax) cho dang VR hien va Little Endian. Cd the thay bang cac cii phap chuy6n ddi khac. DicomObjects hd trg tat ca cac cii phap chuygn ddi theo chuSn DICOM da quy djnh [3].
Hinh 3. Cac bang lint trQ- thdnh phdn da lieu anh theo chudn DICOM tren DICOM Server
Hinh 4 Giao dien phdn mem nhdn va lini trie da- lieu dnh theo chudn DICOM ciia benh nhdn vao DICOM Server
Phan mem nhgn va luu tru" di! lieu anh vao DICOM Server da dugc tac gia xay dimg theo cac thuat toan va cii phap mo ta a tren cd giao dien nhu tren hinh 4.
2.2. XSy dung thu$t toan girj anh DICOM Ien DICOM Server
DS gui anh DICOM Ien DICOM Server, phuang thirc giri doi hdi nhfliig thong sd sau [3]:
Dia chi IP ciia may chii nhan anh (SCP) Ten cdng giri anh (SCU) ma SCP sSn sang nhan dCHieu DICOM
Tieu dl thuc thi I'rng dung (AET) ciia SCP AET ma SCU dugc dat ten cho thuSt toan nhan anh.
NhOng thdng sd tren cho phep thilt lap 1 ket ndi dl giri va nhan du' lieu anh chuin DICOM theo trinh tu sau: Tao mpt kit ndi; Gdi anh nhd djch yu C-STORE trong chuSn DICOM; Ddng kit ndi; Xem xet gia trj tra ve dl danh gia quy trinh giri ("0" gia trj cho gui thanh cdng)
Trong thu vien DicomObjects hd trg dich vu C- STORE, vi vay ta cd thi xay dung thuat toan giii anh DICOM nhu sau; Bk giri anli, trudc tien ta xay dung mdt cira sd thilt lap dl nhap dia chi IP cua DICOM Sever, cdng nhan anh ciia SCP, AET ciia SCP va SCU. Sau khi da cd dirge cic thdng sd tren, thuc hien giri anh theo cii phap dudi day (md phdng sii' dung ngdn ngD' VB.net):
Dim im As Dicomlmage Dim res As Integer im = Viewer. Images
res = im.Send (Dia chi IP ciia SCP. cSng nhdn SCP nhan dnh cita SCP. Tieu de AET ciia img dung (SCU). AET ciia SCP)
Bien "res" nhan gia tri tra vl, nlu "res" ^
"0" thi giri thanh cdng.
Phan mim giri dii lieu anh Ien DICOM Server da dugc tac gia xay dung theo cic thuat loan va cu phap md ta d tren cd giao dien nhu tren hinh 5.
T,^P Clli KHOA HOC & CONG NGHE CAC TRUCfNG D^I HOC K^' THUAT 4. SO 98 - 2014
Hinh 5. Giao dien phdn mem gm dif lieu dnh theo chudn DICOM c-ua benh nhdn cdn chdn dodn Ien DICOM Server
2.3. Xay dyng thugt toan truy xuat vao DICOM Server de lay dir lieu anh
Giao thiic truy xudt de lay dir lieu anh lit DICOM Server:
Su dung lap dich vu chat van va truy vdn dif lieu anh trong chuan DICOM, thuat todn truy xuat sg tao ra va giri di mdt ban tin tdi may chii DICOM Server de chat van ve cac ban ghi anh cd gia tri triing khdp vdi cac gia trj khoa chat van ciia nd. DICOM Server se giri tra lai mdt danh sdch cac hinh anh tuong khdp. Khi da dinh danh dugc cac hinh anh dd, tai tram yeu cau truy xuat se thirc bien lira chpn lay anh tir danh sach hien thi. Khi da lira chpn dugc dfl li?u anh can lay, tai day sS tiep tuc giri mdt ban tin tdi DICOM Server dk. yeu ciu DICOM Server giri dfl lieu ciia chimg tdi tram yeu cau.
DICOM Server se gii'i cac hinh anh dugc yeu cau ciing mdt liic sir dung Idp dich vu kru trfl trong chudn DICOM [3]'.
Dimg DicomObject thuc hien thudt todn truy xudt de lay dCr lieu anh tir DICOM Server:
Thdng qua viec img dung ddi tugng DicomQuery trong DicomObjects, bang each sir dyng ciing mpt ddi tuong cho viec truy van (C- FIND) va lay anh (C-GET. C-MOVE). viec liy dfl lieu anh tir DICOM Server dugc thuc hien theo 3 phuong thiirc sau [3]: (1) DoQuery (C- FIND), (2) Getlmages (C-GET) va (3) GetUsingMove (C-MOVE). Ca 3 phuang thuc tren la ddng bo, nghTa la chi tra lai ket qua khi mang hoat ddng tdt. Cac thdng so can biet khi thuc hien chSt vdn va truy vdn anh gdm: Dja chi IP CLia SCP, Cdng giri anh SCU, Ten AET ctia SCP. Ten AET ciia SCU.
TTinh 6 Giao dien phdn mem truy xudt vdo CSDL tren DICOM Server de lay dii li^u dnh ciia benh nhdn cdn chdn dodn
DicomObjects hd trg viec chat van va truy van cac tang khac nhau trong dfl lieu anh DICOM gdm: PATIENT, STUDY va PATIENT/STUDY. Cac dac tinh chdt vdn theo mdt djnh danh xac dinh dua vao cac thdng tin sau ciia anh DICOM: Name, DateOfBirlh, Sex, PatientID, StudyUID, SeriesUlD, InstanceUID, StudyDate. Phan mem truy xudt vao DICOM Server de lay dfl lieu anh da dugc tac gia xay dirng theo cac thuat toan va cii phap md ta d tr6n cd giao dien nhu tren hinh 6.
2.4, Thuat toan chen ket qua chan doan vao d& lieu anh DICOM
Viec true tiep chen ket qua chan doan ciia bac sy vao dinh dang DICOM ciia benh nhan va gui lai cho noi yeu cau hd tro la mdt tinh nang can thiet de giam thdi gian chd dgi va true quan trong qua trinh phan tich chSn doan.
Su dung DicomObjects ta cd the thuc hien chen thdng tin chan doan dudi dang van ban vao anh DICOM theo thuat toan sau: Thdng tin chdn doan dugc gan vao mdt bien tam thdi. Ddi tugng DicomViewer dgc thanh phan dir lieu cd nhan la (0008,1030) va gan dfl lieu chdn doan vao thanh phan nay thdng qua bd lenh:
Dim chandoan as stnng= iextboxl.texl //
lap thong tin chdn dodn nhap vdo tit mot Textbox
Dicom Viewer. Images(0008.1030) = chandoan.
Khi do dfl lieu chan doan chua dugc luu hoan toan vao anh. De liru lai thdng tin chan doin trong anh DICOM ta can phai giri lai dfl lieu Ign DICOM Server. Dudi day la ham gui anh dinh kem kit qua chan doan vao thanh phdn
TAP CHI KHOA H^C & CONG NGHE CAC TRIICKNG DAI HQC KV THI AT * S 6 98-2014 dfl lieu StudyDescription Ien DICOM Server
trong DicomObjects:
Function send() Dim res. i As Integer Dim im As Dicomlmage Try
If Viewer.Images.Count = 0 Then MessageBox. Show Else
For i ^ OTo Viewer.Images.Count -1 Viewer.Images(i).StudyDescription = Form2 TextBoxl Text
im - Viewer Images(i) res = im.Send (Dia chi IP cita SCP.
Cong nhdn SCP nhgn dnh cita SCP. Tieu de AET cua ling dimg (liic la SCU). AET ciia SCP)
If (res <> 0) Then
MessageBox.Show("Gifi loi" + res.ToStrlng("X4"))
send = 0 Exit Function End If End Function
Phan mem chen kel qua chan doan vao file DICOM de giri lai cho nai yeu cau hd trg chan doan tham khao da dugc tac gia xay dung theo cac thuat toan va cu phap md ta d tren cd giao dien nhu tren hinh 7.
Hmh 7 Giao dien phdn mem chen kit qud chdn dodn cita bdc sy tuyen iren vdo file DICOM di giri hi cho bdc sy tuyen dudi tham khdo 3. THU NGHIEM VA f>ANH GIA
De CO dfl lieu danh gia giai phip dl xudt, tac gia va ddng nghiep da thilt lap mdt md hinh kit ndi thiJ nghiem bao gdm: (1) DICOM Server va CSDL thilt kl dugc dat tai Ha Ndi (c^i d^ittren miy chu HP LI7IO);'(2)'Tram giri yeu cdu hd trg (tram tuyin dudi) va phdn mIm giri dfl lieu anh DICOM dat tai Benh vien Da
khoa tinh Vmh Phtic (cai dgt tren may tinh xach tay HP ProBook 4520s. kit ndi vdi mSy chup cdng hudng tfl Airis Mate ciia Hitachi). (3) Tram nhin hd trg chan doin tfl xa (tram tuyen tren) vi phan mem xir ly anh DICOM dat tai Benh vien Huu Nghj (cai dat tren may tinh xach tay Sony Vaio SVE-14I26CV). Thuc hiSn gui dfl lieu anh DICOM ciia 10 b?nh nhan (BN) chon ngdu nhien da chup MRl tfl may Airis Mate kit ndi vdi tram tuyen dirdi Ien DICOM Server. Tir tram tuyen tren truy xuat vao CSDL tren DICOM Server de lay lai dfl lieu anh. Thirc hien phan tich, xu ly, chen kSt qua chan doin va gui lai DICOM Server. Cudi ciing, tir tram tuyen dudi se truy xudt vao CSDL ciia DICOM Server de tham khao va ddi chirng ket qua hd tra chan doan ciia tram tuyen tren. Thuc hien danh gia cac thdng sd sau cua giai phap dl cd ca sd phan tich, so sanh:
(1) Daiih gia chdt lugng dfl \\t\i anh DICOM ciia benh nhan nhgn dugc tai tram tuyin tren so vdi dfl lieu anh gdc ciia benh nhan tai may tao anh MRl.
(2) Danh gia thdi gian gui todn bd dfl lieu anh ciia benh nhan Ien DICOM Server tu tram tuyen dudi T|.
(3) Danh gia thdi gian truy xudt va nhan lai toan bd dfl lieu anh tir DICOM Server tai may tram tuyen tren Tj.
(4) Thdi gian de bac sJ tuyin tren phan tich, xu \<i dfl lieu anh va chen kit qua hd trg chan doin la T3. Khoang thdi gian nay sg phu thudc vao timg ca chdn doan benh (benh dan gian hay phuc tap), kha nang chdn doan ctia bic sy, chdt lirgng hinh anh chdn doan (thilt bi tao anh mdi hay cu, cdng nghe tao anh cao hay thap) ma khdng phu thudc vao cac ylu td ky thuat ciia giai phap dl xudt trong bai bao. Tren thuc tl hi6n nay, khoang thdi gian T3 nay thirdng dao ddng tu 30 -H 60 phiit cho mdi ca chan doan.
(5) Danh gia thdi gian truy xudt va nhan lai dfl lieu anh cung kit qua chdn dodn tir DICOM Server tai tram tuyin dudi T4.
Tac gia da thirc hien danh gia chdt lugng du Ii6u anh DICOM ciia tram tuyin tren nhan dugc so vdi du lieu gdc sinh ra tai may chup MRl cua tram tuyin dudi cho 10 benh nhan tren thdng qua phuang phap danh gia dugc mo ta
TAP CHI KHOA HOC & CONG NGHE CAC TRI ONG DAI HOC K^' THUAT * SO 98 - 2014 trong [l],[4],[ 5]. Mdi benh nhan sS idy ra nglu
nhien 20-cap khung anh DICOM dl danh gia.
Bieu dd tren binh 8 md ta chat lugng dfl lieu anh DICOM trung binh ciia 10 benh nhan thdng qua gia tri PSNR nhan dirge.
Hinh 8. Chdt luang dir lieu dnh DICOM trung binh cua 10 benh nhdn thong qua gid trj PSNR nhdn duac
Tir bieu do nay ta thay, gia trj PSNR thay ddi tfl 57.28dB din 60.48dB, trung binh la 59.28dB. Ddi chieu vdi yeu cau chat lirong dfl lifiu anh DICOM cho anh MRl sau xir ly, vdi gia tri PSNR trung binh nay thi chdt lugng dfl lieu anh DICOM ma tram tuyen tren nhan dugc cd thi dat dp chinh xac la 99% [4,5].
Tren bang 1 the hien kit qua do 3 thdng sd thdi gian T|, T2, T4 cua 10 benh nhan thdng qua thiet bj ddng hd bam thdi gian.
Bang J Ket qua do j Benh nhan so
Dirlieu(MB) T, (phin) r, (phin) Tj (Phil) Benh nhan so DH lieu (MB)
Tl (pliul) T, (piiin) Tt (phiil)
BNI 79.0 15.8 7.1 8.7 BN6 36.9 7.4 4 1 5.2
thong .Sf j ihdi gian BN2
96.3 16.4 107 12.1 BN7 29.1 4.8 3.2 3.6
BN3 60.6 12 1 6.7 8 6 BN8 98.2 19.6 8.9 13.3
B^4 87.9 14.6 7.9 10.9 BN9 67.0 13.4 7.4 II 1
B^5 132.0 24.3 13.2 14.6 BMO 71.0 13.8 8.8 14.2 Tu bang ket qua do ta thay, vdi dirdng truyen Internet thdng thudng, trung binh dung lugng dfl lieu anh chup MRl ciia I benh nhan la 75.8MB, thdi gian giri dfl lieu tfl Iram tuyin dudi Ien DICOM Sever Ti la 14.2 phiit; thdi gian truy xuat va nhan lai toan bd dCf lieu tai tram tuyen tren T2 la 7.8 phiit; thdi gian truy xuat va nhan lai ket qua hd trg chan doan tai tram tuyen dudi T4 la 10.3 phut. Nhir vay, trung binh thdi gian de tram tuyen tren cd the nhan dugc toan bd dfl lieu anh ciia benh nhan can hd trg chan doan (T1+T2) la 22 phiit; Tdng thdi
gian tfl khi giri yeu cau cho tdi liic nhan lai dugc dfl lieu cung ket qua hd trg chan do^n (T!+T2+T3+T4) la tfl 62.3 ^ 90.3 phut. Vdi thdi gian nay, quy trinh hd trg chan doan tfl xa da thuan tien va ngdn han nhilu so vdi viec phai chuyen true tiep benh nhan Ien tuyin tren.
4. KET LUAN
Vdi giai phap hd trg chan doan hinh anh tfl xa dira theo chuan DICOM tron^ y tl ma tac gia da de xuat xay dung va tien hanh thu nghiem d tren thdng qua Ihiet lap he thdng ket ndi giiJa tram tuyen dudi la Benh vien Da khoa linh VTnh Phuc, tram tuyen tren la Benh vien Hih! Nghi va DICOM Server dat tai Ha Ndi vdi dfl lieu anh DICOM la anh chup MRl tieu bilu dugc sir dung phd bien trong chan doan hien nay cd the thay:
v l mat chdt lugng dfl lieu anh DICOM nhan dugc tai tram tuyen tren so vdi dfl lieu anh gdc tai may chup MRl ciia tram tuyin dudi, gia trj PSNR thu dugc trung binh la 59.28dB. Vdi chdt lugng dat dugc nay, dfl lieu anh ma tram tuyen tren nhan dugc hoan toan cd the dap ung cac yeu cau ve xu ly dfl lieu anh chan doan dung trong y te vdi dd chinh xac cd the dat la 99%.
Vimat thdi gian, trung binh thdi gian dl tram tuyen tren cd the nhan dugc toan bd dfl lieu anh ciia benh nhan la 22 phiil; tdng thdi gian tfl khi giri din khi nhan lai duac kit qua hd trp chan doan la tir 62.3 -^ 90.3 phut. Nhu vay, vdi phuang thuc va thdi gian thuc hien trong giai phap nay, benh nhan cd the tilt kiem dugc ca ve chi phi ciing nhu thai gian chdn doan benh so vdi giai phap chuyen true tilp ngudi benh Ien tuyin tren.
Tu dd cd the ket luan, giai phap md ta trong bai bao vdi phuang thirc trien khai dan gian (cai dat phan mIm tren may tinh cho luyin tren va tuyen dudi), dua tren co sd ha tdng truyin thdng hien cd tai cac benh vien, chi phi ddu tu thap cung cd thi khac phuc dugc nhung tdn tai hien nay trong khau ho trg chan doan hinh anh tu xa gifla cac co sd y tl tuyin tren va tuyen dudi, mang lai lgi ich cho ngudi benh va nganh y te.
TAP CHi KHOA HOC & CONG NGHE CAC TRll'dNG D^I HOC KV THUAT * S6 98 - 2014
TAI LIEU THAM KHAO
1 Vu Duy Hai, Nguyen Due Thuan, Pham Phuc Ngoc (2012). Automafic Retrieving Data from Medical Imaging Equipments and Evaluation Electronic Health Record Quality. Journal of Science and Technology. No 88/2012. pp: 30-35.
2. Nguyen Due Thuan, Vfl Duy Hai (2006), Trdn Anh Vu. He thdng thdng tin y tl. NXB Bach Khoa Ha Ngi.
3. H.K.Huang (1999). PACS Basic Principles and Applications. John Wiley and Sons, Inc., Publication.
4. Bami, Mauro, et al. (2006). Fractal Image Compression. Docunient and image compression (CRC Press) 968, pp.168-169.
5. Welstead, Stephen T. (1999). Fractal and wavelet image compression techniques. SPIE Publication, pp. 155-156.
Dia chi liHn ht Vu Duy Hai - Tel: 04.38682099 - Email: [email protected].
Bd mdn Cong ngh6 dien tu va Ky thu^t y sinh
Vien Dien tfl Vidn thdng, Trudng Dai hpc Bach khoa Ha Ndi Sd 1 - Dai Cd Viet - Hai Ba Trung - Ha Ndi
