Uporaba PA projekcije namesto AP pri slikanju SIS

Mekiš, Nejc (author), Mc Entee, Mark F. (author)

Namen: Namen naše raziskave je bil ugotoviti v kolikšni meri se zmanjša vstopna kožna doza (VKD) in obsevanost testisov pri slikanju SIS v posteroanteriorni (PA) projekciji v primerjavi z anteroposteriorno (AP) projekcijo, ter v kolikšni meri se zmanjša ta obsevanost, če uporabimo svinčeno zaščito. Metode dela: V naši raziskavi smo merili vstopno kožno dozo pri slikanju SIS in dozo, ki jo prejmejo testisi, s pomočjo termoluminiscentnih dozimetrov (TLD), ki smo jih pritrdili v centru slikovnega polja in na testise. Pred izvajanjem meritev smo z različnimi ekspozicijskimi pogoji, ki so napisani v Evropskih smernicah naredili 10 rentgenogramov za vsako projekcijo. Glede na pridobljene meritve s produktom doze in površine (DAP), ter ocene kvalitet slik smo določili optimalne pogoje za izvajanje meritev. Rezultati: Glede na meritve DAP smo ugotovili, da je doza, ki jo prejme fantom pri enakih ekspozicijskih pogojih v PA, manjša kot v AP projekciji (p≤0,009), ni pa bilo statistično značilnih razlik v kvaliteti slik (p≤0,483). Doza, ki jo pacient prejme na testise v PA projekciji je pri slikanju SIS za 94% manjša kot doza, ki jo prejme v AP projekciji (p≤0,020; p≤0,019). Nismo ugotovili statistično značilnih razlik med prejeto dozo na testise pri meritvah z in brez uporabe svinčene zaščite (p≤0,559; p≤0,058). Zaključek: Iz pridobljenih rezultatov lahko sklepamo, da je pri slikanju SIS bolje uporabljati PA projekcijo, ker je doza, ki jo prejme moški na testise statistično značilno manjša od doze, ki jo bo prejel v AP projekciji. Uporaba klasične zaščite pri delih telesa, ki ležijo izven slikovnega polja pa ne prispeva veliko k zmanjšanju doze.

• Language: Slovenian
• Keywords: sakroiliakalni sklepi, doza na testise, svinčena zaščita
• Typology: 1.01 - Original Scientific Article
• Organization: ZF - Faculty of Health Sciences
• Year: 2009
• Number of pages: Str. 15-19
• Numbering: Letn. 26, št. 2
• PID: 20.500.12556/RUL-114443
• UDC: 616-073
• ISSN on article: 1855-5136
• URN: URN:NBN:SI:DOC-3GJNDS4T
• COBISS.SI-ID: 3930219
• Publication date in RUL: 28.02.2020

Record is a part of a journal

• Title: Bilten
• Publisher: Društvo radioloških inženirjev Slovenije, Zbornica radioloških inženirjev Slovenije
• ISSN: 1855-5136
• COBISS.SI-ID: 241400320

Secondary language

• Language: English
• Title: Use of PA projection instead of AP in SIJ imaging

Abstract

Purpose: To determine the difference between scattered radiation emitted to testes in anterior (AP) and posterior (PA) projection of sacroiliac joint imaging in conventional radiography, with and without scrotum shield. Methods: The entrance skin dose (ESD) and the dose received by the testicles was measured on the phantom using termoluminiscent dosimeters (TLD). The optimisation was determined according to the European guidelines on quality criteria for diagnostic radiographic images, considering the quality of the image and the dose area product (DAP) measurement. Results: According to the DAP measurements we discovered that the dose received by the phantom in the same exposure conditions in PA is lower than in the AP projections (p≤0,009). However, there were no statistically signifi cant differences in the image quality (p≤0,483). The dose received by patient’s testicles in the PA projection in SIJ imaging is 94% lower than the dose received in the AP projection. No statistically signifi cant differences were determined between the dose received by the testicles in measurements with and without a scrotum shield in AP (p≤0,559; p≤0,058). Conclusion: We can conclude that it is better to use the PA projection in SIJ imaging, because the dose received by male testicles in signifi cantly lower than the dose received in the AP projection. The use of the classical protection used in the body parts outside the primary x-ray beam is not highly relevant for the reduction of the received dose in AP.

• Keywords: sacroiliac joints, dose on testicles, lead shield