CT l\u00e0 t\u1eeb ti\u1ebfng Anh vi\u1ebft t\u1eaft c\u1ee7a X-ray Computer Tomography, ngh\u0129a l\u00e0 \u201cch\u1ee5p X quang c\u1eaft l\u1edbp b\u1eb1ng m\u00e1y t\u00ednh\u201d. Nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y gi\u1ed1ng h\u1ec7t thi\u1ebft b\u1ecb ch\u1ee5p X quang th\u00f4ng th\u01b0\u1eddng. Sau khi tia X quang xuy\u00ean qua c\u00e1c c\u01a1 th\u1ec3 ng\u01b0\u1eddi, c\u01b0\u1eddng \u0111\u1ed9 tia X quang t\u0103ng hay gi\u1ea3m s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o m\u1eadt \u0111\u1ed9 v\u1eadt ch\u1ea5t. Sau \u0111\u00f3, m\u00e1y t\u00ednh s\u1eed d\u1ee5ng nh\u1eefng th\u00f4ng tin n\u00e0y, ho\u00e0n ch\u1ec9nh, x\u1eed l\u00fd v\u00e0 t\u1ea1o th\u00e0nh h\u00ecnh \u1ea3nh b\u00ean trong c\u1ee7a b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c ch\u1ee5p, \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u00ecnh \u1ea3nh c\u1eaft l\u1edbp c\u1ee7a t\u1ed5 ch\u1ee9c b\u1ecb b\u1ec7nh. \u0110i\u1ec1u kh\u00e1c bi\u1ec7t v\u1edbi ch\u1ee5p X quang th\u00f4ng th\u01b0\u1eddng l\u00e0 khi ch\u1ee5p CT do kh\u00f4ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng t\u1eeb m\u1eadt \u0111\u1ed9 v\u1eadt ch\u1ea5t n\u00ean h\u00ecnh \u1ea3nh s\u1ebd v\u00f4 c\u00f9ng r\u00f5 r\u00e0ng. Hi\u1ec7n t\u01b0\u1ee3ng phim c\u00f3 th\u1ec3 nh\u00f2e khi ch\u1ee5p X quang th\u00f4ng th\u01b0\u1eddng s\u1ebd kh\u00f4ng xu\u1ea5t hi\u1ec7n khi ch\u1ee5p CT. Ngo\u00e0i ra, h\u00ecnh \u1ea3nh ch\u1ee5p CT c\u00f2n ph\u1ea3n \u1ea3nh \u0111\u01b0\u1ee3c nh\u1eefng kh\u00e1c bi\u1ec7t d\u00f9 r\u1ea5t nh\u1ecf gi\u1eefa c\u00e1c t\u1ed5 ch\u1ee9c kh\u1ecfe m\u1ea1nh v\u00e0 c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 b\u1ec7nh. \u0110\u1eb7c bi\u1ec7t h\u01a1n n\u1eefa, sau khi \u0111\u01b0\u1ee3c m\u00e1y t\u00ednh ho\u00e0n ch\u1ec9nh, x\u1eed l\u00fd th\u00f4ng tin v\u1ec1 v\u1ecb tr\u00ed, t\u00ednh ch\u1ea5t, \u0111\u1ed9 l\u1edbn nh\u1ecf c\u1ee7a kh\u1ed1i u trong c\u01a1 th\u1ec3, h\u00ecnh \u1ea3nh s\u1ebd hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh v\u1eeba nhanh v\u1eeba tr\u1ef1c quan. Ch\u00ednh v\u00ec th\u1ebf, thi\u1ebft b\u1ecb ch\u1ee5p CT \u0111\u00e3 tr\u1edf th\u00e0nh \u0111\u1ed3ng nghi\u1ec7p, ng\u01b0\u1eddi tr\u1ee3 l\u00fd \u0111\u1eafc l\u1ef1c c\u1ee7a c\u00e1c b\u00e1c s\u1ef9.<\/p>\n\n\n\n
Thi\u1ebft b\u1ecb ch\u1ee5p CT ch\u1ee7 y\u1ebfu g\u1ed3m nh\u1eefng ph\u1ea7n sau:<\/p>\n\n\n\n
M\u00e1y ph\u00e1t ch\u00f9m tia X: c\u00f3 th\u1ec3 ph\u00f3ng ch\u00f9m tia X quang t\u1edbi b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn n\u00e0o, \u1edf m\u1ecdi g\u00f3c \u0111\u1ed9 v\u00e0 d\u00f9 n\u1eb1m s\u00e2u trong c\u01a1 th\u1ec3 ng\u01b0\u1eddi \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n\n\n\n
C\u00e1c ph\u1ea7n t\u1eed d\u00f2: thu nh\u1eadn c\u00e1c tia X xuy\u00ean qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi. Th\u00f4ng th\u01b0\u1eddng, m\u1ed9t m\u00e1y ch\u1ee5p CT c\u00f3 t\u1edbi c\u1ea3 tr\u0103m, th\u1eadm ch\u00ed ngh\u00ecn ph\u1ea7n t\u1eed d\u00f2 \u0111\u1ec3 c\u00f3 th\u1ec3 thu th\u1eadp \u0111\u01b0\u1ee3c c\u00e1c tia X quang t\u1eeb nhi\u1ec1u g\u00f3c \u0111\u1ed9 kh\u00e1c nhau, \u0111em l\u1ea1i l\u01b0\u1ee3ng th\u00f4ng tin phong ph\u00fa.<\/p>\n\n\n\n
M\u00e1y t\u00ednh chuy\u00ean d\u1ee5ng: bao g\u1ed3m m\u00e1y chuy\u1ec3n \u0111\u1ed5i \u201csao ch\u00e9p \/ s\u1ed1 h\u00f3a\u201d, \u201cs\u1ed1 h\u00f3a \/ sao ch\u00e9p\u201d. M\u00e1y n\u00e0y s\u1ebd ti\u1ebfn h\u00e0nh ho\u00e0n ch\u1ec9nh, x\u1eed l\u00fd, ghi nh\u1edb v\u00e0 hi\u1ec3n th\u1ecb th\u00f4ng tin \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn t\u1eeb ph\u1ea7n t\u1eed d\u00f2.<\/p>\n\n\n\n
Thi\u1ebft b\u1ecb ra phim.<\/p>\n\n\n\n
Qu\u00e1 tr\u00ecnh ch\u1ee5p CT c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n
B\u1ec7nh nh\u00e2n \u0111\u01b0\u1ee3c \u0111\u1eb7t n\u1eb1m tr\u00ean b\u00e0n ch\u1ee5p CT, b\u00e1c s\u1ef9 s\u1ebd \u0111i\u1ec1u ch\u1ec9nh c\u1ef1 ly v\u00e0 v\u1ecb tr\u00ed c\u1ee7a m\u00e1y ph\u00e1t tia X quang v\u1edbi b\u1ed9 ph\u1eadn c\u1ea7n ph\u1ea3i ki\u1ec3m tra tr\u00ean c\u01a1 th\u1ec3 sao cho th\u00edch h\u1ee3p, ph\u00f3ng ch\u00f9m tia X quang, qu\u00e9t (scan) c\u00e1c t\u1ed5 ch\u1ee9c theo t\u1eebng l\u1edbp, \u0111\u1ed3ng th\u1eddi l\u00fac n\u00e0y kh\u1edfi \u0111\u1ed9ng c\u00e1c ph\u1ea7n t\u1eed d\u00f2, thu nh\u1eadn c\u00e1c tia X quang xuy\u00ean qua c\u01a1 th\u1ec3, sau \u0111\u00f3 \u0111\u1ec3 m\u00e1y chuy\u1ec3n \u0111\u1ed5i \u201csao ch\u00e9p \/ s\u1ed1 h\u00f3a\u201d c\u00e1c th\u00f4ng tin v\u00e0 chuy\u1ec3n to\u00e0n b\u1ed9 th\u00e0nh th\u00f4ng tin d\u1ea1ng s\u1ed1. Ti\u1ebfp \u0111\u00f3 l\u1ea1i nh\u1eadp to\u00e0n b\u1ed9 v\u00e0o m\u00e1y t\u00ednh. M\u00e1y t\u00ednh s\u1ebd ti\u1ebfn h\u00e0nh ho\u00e0n ch\u1ec9nh, x\u1eed l\u00fd th\u00f4ng tin, bao g\u1ed3m c\u1ea3 vi\u1ec7c lo\u1ea1i b\u1ecf nh\u1eefng th\u00e0nh ph\u1ea7n l\u00e0m nhi\u1ec5u th\u00f4ng tin, ph\u00e2n t\u00edch nh\u1eefng kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c t\u1ed5 ch\u1ee9c v\u00e0 l\u00e0m t\u0103ng \u0111\u1ed9 n\u00e9t c\u1ee7a c\u00e1c h\u00ecnh \u1ea3nh\u2026 Sau n\u1eefa, c\u00e1c th\u00f4ng tin d\u1ea1ng s\u1ed1 l\u1ea1i \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1edbi m\u00e1y chuy\u1ec3n \u0111\u1ed5i \u201cs\u1ed1 h\u00f3a \/ sao ch\u00e9p\u201d \u0111\u1ec3 hi\u1ec7n th\u1ecb l\u00ean m\u00e0n h\u00ecnh m\u00e1y t\u00ednh. Ra phim l\u00e0 c\u00f4ng \u0111o\u1ea1n cu\u1ed1i c\u00f9ng c\u1ee7a c\u00f4ng vi\u1ec7c ch\u1ee5p X quang.<\/p>\n\n\n\n
Th\u00f4ng th\u01b0\u1eddng khi ch\u1ee5p CT, ng\u01b0\u1eddi ta s\u1ebd ch\u1ee5p nhi\u1ec1u h\u00ecnh \u1ea3nh, v\u00ec sao th\u1ebf nh\u1ec9? Th\u1ebf n\u00e0y nh\u00e9, n\u1ebfu mu\u1ed1n bi\u1ebft v\u1ecb tr\u00ed hay k\u00edch c\u1ee1 c\u1ee7a l\u00f2ng \u0111\u1ecf qu\u1ea3 tr\u1ee9ng lu\u1ed9c, n\u1ebfu ch\u1ec9 d\u00f9ng dao c\u1eaft \u1edf gi\u1eefa th\u00f4i th\u00ec kh\u00f4ng th\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c l\u1eddi gi\u1ea3i \u0111\u00e1p to\u00e0n di\u1ec7n. Nh\u01b0ng n\u1ebfu b\u1ea1n l\u1ea7n l\u01b0\u1ee3t c\u1eaft ti\u1ebfp n\u0103m, s\u00e1u dao n\u1eefa, ho\u1eb7c c\u1eaft th\u00e0nh c\u00e0ng nhi\u1ec1u l\u1edbp \u0111\u1ec3 so s\u00e1nh, ph\u00e2n t\u00edch, th\u00ec l\u00fac n\u00e0y k\u1ebft lu\u1eadn c\u1ee7a b\u1ea1n s\u1ebd ch\u00ednh x\u00e1c h\u01a1n r\u1ea5t nhi\u1ec1u. Ch\u1ee5p CT c\u0169ng th\u1ebf. S\u1ef1 th\u1eadt l\u00e0, c\u00f3 c\u00e0ng nhi\u1ec1u b\u1ee9c \u1ea3nh c\u1eaft l\u1edbp th\u00ec kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c l\u1edbp c\u1eaft c\u00e0ng nh\u1ecf, k\u1ebft qu\u1ea3 ki\u1ec3m tra c\u00e0ng ch\u00ednh x\u00e1c. V\u00e0 nh\u1edd c\u00f3 s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a m\u00e1y t\u00ednh, d\u00f9 c\u00f3 ch\u1ee5p bao nhi\u00eau l\u00e1t c\u1eaft th\u00ec c\u0169ng l\u00e0 vi\u1ec7c r\u1ea5t d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n
Ch\u1ee5p c\u1eaft l\u1edbp CT ra \u0111\u1eddi n\u0103m 1972, ch\u1ec9 v\u1edbi g\u1ea7n 40 n\u0103m l\u1ecbch s\u1eed, nh\u01b0ng nh\u1edd s\u1ef1 ti\u1ebfn b\u1ed9 v\u01b0\u1ee3t b\u1eadc c\u1ee7a k\u1ef9 thu\u1eadt m\u00e1y t\u00ednh m\u00e0 kh\u1ea3 n\u0103ng ch\u1ee5p CT c\u0169ng ng\u00e0y m\u1ed9t \u01b0u vi\u1ec7t, t\u1ea1o ra c\u00e1c b\u1ee9c \u1ea3nh v\u00f4 c\u00f9ng r\u00f5 r\u00e0ng. Th\u00f4ng tin t\u1eeb \u1ea3nh ch\u1ee5p X quang th\u00f4ng th\u01b0\u1eddng nh\u01b0 t\u1eebng d\u00f9ng trong qu\u00e1 kh\u1ee9 c\u00f2n nhi\u1ec1u h\u1ea1n ch\u1ebf, kh\u00f4ng th\u1ec3 ki\u1ec3m tra \u0111\u01b0\u1ee3c c\u00e1c c\u01a1 quan n\u1ed9i t\u1ea1ng\u2026 Nh\u01b0ng v\u1edbi \u1ea3nh ch\u1ee5p CT, m\u1ecdi th\u1ee9 \u0111\u1ec1u tr\u1edf n\u00ean r\u00f5 r\u00e0ng. Ch\u00ednh v\u00ec th\u1ebf, ch\u1ee5p CT ng\u00e0y c\u00e0ng tr\u1edf n\u00ean th\u00e2n thi\u1ebft h\u01a1n v\u1edbi c\u00e1c b\u00e1c s\u1ef9 v\u00e0 ng\u01b0\u1eddi b\u1ec7nh.<\/p>\n\n\n\n
T\u1eeb kh\u00f3a: CT; Tia X<\/p>\n","protected":false},"excerpt":{"rendered":"
CT l\u00e0 t\u1eeb ti\u1ebfng Anh vi\u1ebft t\u1eaft c\u1ee7a X-ray Computer Tomography, ngh\u0129a l\u00e0 \u201cch\u1ee5p X quang c\u1eaft l\u1edbp b\u1eb1ng m\u00e1y t\u00ednh\u201d. Nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y gi\u1ed1ng h\u1ec7t thi\u1ebft b\u1ecb ch\u1ee5p X quang th\u00f4ng th\u01b0\u1eddng. Sau khi tia X quang xuy\u00ean qua c\u00e1c c\u01a1 th\u1ec3 ng\u01b0\u1eddi, c\u01b0\u1eddng \u0111\u1ed9 tia X quang t\u0103ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,13],"tags":[],"class_list":["post-10420","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tin-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10420","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10420"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10420\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10420"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10420"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}