Effect of equalization filters on measurements with kerma-area product meter in a cardiovascular angiography system.

ABSTRACT:

Purpose

This study aimed to evaluate the effect of equalization filters (EFs) on the kerma-area product ( KAPQKM ) and incident air-kerma ( Ka,i,QKM ) using a kerma-area product (KAP) meter. In addition, potential underestimations of the Ka,i,QKM values by EFs were identified.

Materials and methods

A portable flat-panel detector (FPD) was placed to measure the X-ray beam area (A) and EFs dimension at patient entrance reference point (PERP). Afterward, a 6-cm³ external ionization chamber was placed to measure incident air-kerma ( Ka,i,Qext ) at PERP instead of the portable FPD. KAP reading and Ka,i,Qext were simultaneously measured at several X-ray beam qualities with and without EFs. The X-ray beam quality correction factor by KAP meter ( kQ,Q0KM ) was calculated

SUBMITTER: Ichikawa N 

PROVIDER: S-EPMC8664145 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature