КТ калькулятор

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Isibali No. 1

Indlela yokulinganisa umthamo osebenzayo ngesikhathi sokuhlolwa kwe-CT okusekelwe ezilinganisweni zomthamo omunnyiwe kuma-phantom angokomzimba alingisa umzimba wesiguli.

Isebenza njengesilinganiso sengozi yebhayoloji yokuchayeka emisebeni phakathi nokuhlolwa kwe-CT futhi ivumela ukuqhathanisa okuqondile nomthamo osebenzayo wezinye izinhlobo zokuhlolwa kwe-x-ray. Iyunithi yokulinganisa yi-mSv.

Umthamo osebenzayo ubalwa kusetshenziswa ifomula:

E = DLP*Edlp, kuphi

I-DLP (Dose Length Product, umkhiqizo wethamo nobude) - umthamo omuncwa kulo lonke ucwaningo lwe-CT ku-mGy*cm.

I-Edlp - i-dose coefficient yendawo ehambisanayo ye-anatomical mSv/(mGy*cm).

Isibalo senziwa ngokuya nge-MU 2.6.1.3584-19 "Izinguquko ku-MU 2.6.1.2944-19 "Ukulawulwa kwemithamo esebenzayo yemisebe ezigulini ngesikhathi sokuhlolwa kwe-x-ray yezokwelapha"

Isibali No. 2

Isibali sidizayinelwe ukubala iphesenti eliphelele nelihlobene lokugezwa kwe-ejenti yokugqama kusuka kuzindlala ze-adrenal phakathi nocwaningo lokuqhathanisa. Inqubo isetshenziselwa ukuhlukanisa phakathi kwezilonda ezimbi neziyingozi.

Ukuze utolike imiphumela, iphesenti lokuwasha ngokugqamayo kufanele libalwe. Ukuze uyibale, kusetshenziswa amafomula amabili.

Iphesenti lokuwasha eliphelele: 100 x (ukuminyana kwesigaba se-venous (HU) - ukuminyana kwesigaba esibambezelekile (HU))/(Ukuminyana kwesigaba se-venous (HU) - ukuminyana kwesigaba somdabu (HU))

Amaphesenti ahlobene okugeza: 100 x (venous phase density (HU) - ukubambezeleka kwesigaba sokuminyana (HU))/venous phase density (HU)

Isibali No. 3

I-Glomerular filtration rate (GFR) inani legazi elihlanzwa yizinso esikhathini esithile. I-GFR iyinkomba eyinhloko yokuhlola ukusebenza kwezinso kanye nesigaba sokuhluleka kwezinso.

Izinga lokuhlunga kwe-glomerular linqunywa izinga lokuhlanzwa kwegazi (ukucaciswa) kwezinto ezithile ezikhishwe yizinso ezingafihliwe futhi ziphinde zifakwe kumashubhu (imvamisa i-creatinine, inulin, urea).

Isibalo se-CKD-EPI siyifomula enembe kakhulu, yagcina ukulungiswa ngo-2021

142 * min(Scr/k, 1)α * max(Scr/k, 1)-1.200 * 0.9938Iminyaka * 1.012 [yabesifazane], lapho
I-Scr - i-creatinine ye-plasma ku-mg/dl

k = 0.7 (abesifazane) noma 0.9 (amadoda)

α = -0.241 (abesifazane) noma -0.302 (amadoda)

min(Scr/κ, 1) - ubuncane benani le-Scr/κ noma 1.0

ubuningi(Scr/κ, 1) - inani eliphakeme lika-Scr/κ noma 1.0

iminyaka - iminyaka ngeminyaka

Ukuhlola ukusebenza kwezinso ezinganeni, ifomula ye-Schwartz isetshenziswa:

k * ubude (cm) / i-plasma creatinine (µmol/l), lapho

Kubafana abaneminyaka engaphezu kuka-13 ubudala: k = 0.0616

Ezinganeni ezingaphansi kweminyaka emi-3 ubudala: k = 0.0313

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